SGP/SIRS/E19 - Shadowband Misalignment

The solar tracker appears to have failed on 8/28. Fuse replaced on 09/04/03 and tracker 
returned to service at 15:26GMT

• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• down_long_hemisp_shaded_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• down_short_diffuse_hemisp_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)

SGP/SIRS/E13 - Missing data due to Ice storm and clock problems

Data are missing due to power failures caused by an ice storm
and resulting system/instrument clock problems.

• inst_down_long_shaded_case_temp
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• up_long_hemisp_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• East longitude(lon)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• up_short_hemisp_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• North latitude(lat)
• vBatt
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• down_short_diffuse_hemisp_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Altitude above mean sea level(alt)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• inst_down_long_shaded_dome_temp
• time_offset
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• down_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• base_time
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• down_long_hemisp_shaded_std
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• short_direct_normal_std
• inst_up_long_case_temp
• inst_up_long_dome_temp

SGP/SIRS/E18 - Missing data due to Ice storm and clock problems

Data are missing due to power failures caused by an ice storm
and resulting system/instrument clock problems.

• vBatt
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• short_direct_normal_std
• inst_down_long_shaded_dome_temp
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• up_long_hemisp_std
• down_short_diffuse_hemisp_std
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• up_short_hemisp_std
• inst_up_long_case_temp
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• down_long_hemisp_shaded_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• time_offset
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• down_short_hemisp_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• inst_down_long_shaded_case_temp
• Altitude above mean sea level(alt)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• North latitude(lat)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• inst_up_long_dome_temp
• East longitude(lon)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• base_time

SGP/SIRS/E2 - Missing data due to Ice storm and clock problems

Data are missing due to power failures caused by an ice storm
and resulting system/instrument clock problems.

• down_short_hemisp_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• East longitude(lon)
• time_offset
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• North latitude(lat)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• up_long_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• inst_down_long_shaded_dome_temp
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Altitude above mean sea level(alt)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• inst_up_long_case_temp
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• down_short_diffuse_hemisp_std
• short_direct_normal_std
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• inst_down_long_shaded_case_temp
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• vBatt
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• base_time
• inst_up_long_dome_temp
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• up_short_hemisp_std
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• down_long_hemisp_shaded_std
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)

SGP/SIRS/E2 - Ventilator Fan Failure

Measured downwelling shortwave data was very questionable, reporting 
nighttime values as low as -50 W/m^2, while differing from calculated 
downwelling shortwave by as much as 50 W/m^2 lower during the day. The 
first indication of a problem was around 10 UTC, 9/14, when measured 
DS values suddenly dropped below 10 W/m^2 for about a 2 hour period 
before sunrise, then were consistently lower than calculated DS by as 
much as 40 W/m^2 during the day.

The problem got progressively worse with time until the ventilator fan was
replace on 9/25.  Ventilator fan failure changed the fundamental
operating characteristics of this PSP and resulted in unpredictable biased
measurements which cannot be corrected without additional empirical
characterization of the radiometer in question.

• down_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)

SGP/SIRS/E9 - Possible instrument drift

Downwelling shortwave values were too low, dropping below -10 W/m^2 
                 at night and reading 30-50 W/m^2 lower than DS calculated from 
                 direct and diffuse measurements during the day. This problem became 
                 more noticeable beginning on 10/14, when nighttime values began to 
                 drop below -10 W/m^2 consistently. The problem was corrected with 
                 the annual instrument changout on 10/23/03.  

                   Although the downwelling shortwave instrument (DS) appears to be the 
                 problem a more likely scenario is that the cable connections became 

                 thermopile.  The instrument changeout possibly reseated and corrected 
                 any poor connections.

• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• down_short_hemisp_std

SGP/SIRS/E18 - Instrument noise problem

Upwelling longwave data was somewhat noisy during this period. There
               was a direct relation to the case and dome thermistor measurements for 
               the upwelling longwave PIR (UIR). Data quality does not appear to be 
               greatly affected overall, though instantaneous values had greater 
               than usual variability. The noise disappeared on 10/19.

• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• inst_up_long_dome_temp
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• inst_up_long_case_temp
• up_long_hemisp_std

SGP/SIRS/E7 - Unknown problem with downwelling shortwave instrument (Eppley PSP)

Beginning around 0317 UTC, 11/21, downwelling shortwave values became anamolously high 
during the night, when they should have been around zero. Values returned to normal after 
SGP technicians reseated this instruments connections at 1215UTC 12/02/2003.  The following 
day's data appeared normal.  Appears that a poor connection was the culprit this time.

• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std

SGP/SIRS/E4 - Shadowband Misalignment

The solar tracker failed on 12/4, resulting in bad direct and 
               diffuse measurements. The tracker started working again on 12/8 
               without Ops intervention.  Technician maintenance checks on 12/3
               and 12/17 reported correct tracker operation.

• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• down_short_diffuse_hemisp_std
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std

SGP/SIRS/E1/E2/E3/E5/E8 - Snow on Radiometers

A large discrepancy between the measured values of downwelling hemispheric shortwave 
radiation and the derived values occurred on 2/02 at the listed sites.  The difference is on 
the order of 200 Wm^(-2) at E2 and to a lesser extent at the other affected stations.  
This problem most likely resulted from a previous day or night snow/ice accumulation on 
the Direct(NIP), Downwelling Sortwave(PSP) and/or  Downwelling Diffuse(8-48) instruments.  
During the morning hours of 02/02, Approx 1300-2000GMT, snow/ice was covering one or more 
of these three instruments resulting in faulty readings and incorrect derived 
downwelling shortwave values as well.  Instrument readings indicate the problem resolved itself 
later in the day through normal meltoff.

• down_short_hemisp_std
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_diffuse_hemisp_std
• short_direct_normal_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)

• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• down_short_hemisp_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• short_direct_normal_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• down_short_diffuse_hemisp_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)

SGP/SIRS/E9 - PSP dome contamination

Measured values of diffuse shortwave downwelling radiation fluctuated below derived values 
of downwelling shortwave radiation by 50 W/m^2 during the afternoon hours under clear 
conditions. 

SMOS precipitation and wind speed data reveals rain and wind the night before on 02/20/03 
0100 GMT probably contaminated the PSP dome with dirt.

Precipitation of .25mm on 02/23/04 0300 seems to have effectively cleared the PSP dome 
since PSP data on 02/24/04 compares correctly to direct and diffuse components.

• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• down_short_hemisp_std

SGP/SIRS/E2 - Reprocessing Notice (RID 293)

See below for details of reprocessing that was completed on 20150929.  Original 
DQR category: 4 (Red, Incorrect).

-----------------------------------------------------------

During the pyrgeometer instrument (PIR) changout a datalogger program was loaded with 
incorrect calibration coefficients for the shortwave instruments.  The affected measurements 
were : downwelling diffuse (DD), upwelling shortwave(US), direct normal (NIP) and 
downwelling shortwave(DS)

Recalculate irradiances by determining original mV signal and reapplying the correct 
calibration coefficients.  For each one minute irradiance value perform the following 
calculations by instrument:
DD(corrected) = (DD/107.24)*118.11
US(corrected) = (US/113.19)*118.21
NIP(corrected)= (NIP/120.17)*119.08
DS(corrected) = (DS/118.46)*117.33

• down_short_hemisp_std
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_diffuse_hemisp_std
• short_direct_normal_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• up_short_hemisp_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)

SGP/SIRS/E15 - PSP dome contamination

PSP dome was dirty.  Afternoon values of downwelling shortwave radiation were less than 
derived values by about 50 W/m^2.  

PSP values compare well to derived PSP values after precip event on 02/29/04 1300-1600 
GMT. Maintenance on 03/02 1713 GMT revealed no unusual contamination.  Precip on 02/29 
likely effectively cleaned the PSP dome.

• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• down_short_hemisp_std

SGP/SIRS/E8 - Possible Contamination of DS PSP instrument

Downwelling hemispheric shortwave values drop at about 1500 GMT under clear sky 
conditions, typically from about 14:00GMT to 16:00GMT.  This may be due to a dirty PSP but 
maintenance on 03/23/04 18:11 GMT revealed no more than typical light dust.  The problem was 
essentially undetectable by  03/31/04 12:00. The time of day that the problem exists appears 
to be an exagerated PSP cosine response.  No obvious reason presents why the problem 
appeared and then disappeared within this two week period.

• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)

SGP/SIRS/E7 - PSP dome contamination

Values of hemispheric downwelling shortwave radiation differed from derived values by 45 
W/m^2 on 03/30 around 1430 GMT under clear sky conditions due to dirt on the dome.

Maintenance reported cleaning heavy dust from dome on 04/06 2030 GMT.

• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std

SGP/SIRS/E19 - Metadata errors

The latitude, longitude and altitude of the El Reno (E19) site were
incorrectly entered into the ARM database.  The correct location
of the SIRS.E19 instrument is:
   Lat: 35.557N
   Lon: 98.017W
   Alt:    421m

• East longitude(lon)
• North latitude(lat)
• Altitude above mean sea level(alt)

SGP/SIRS/E15 - NIP cable failure results in missing data

The NIP began reporting -9999 (missing) for all direct normal 
              downwelling shortwave radiation.  Maintenance 6/8 revealed a 
              broken cable. Cable was repaired and NIP data returned to normal.

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

SGP/SIRS/E12 - Incorrect Times

The ntpd server (time adjustment) stopped working on Feb. 19th at 22:12:16 GMT, and the 
clock was corrected by -5600.177269 seconds
on March 10th at 22:47 GMT. The recorded times for observations are
off by amounts ranging from 0 seconds on Feb. 19th to 5600 seconds
on March 10th.

• vBatt
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• down_short_diffuse_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• down_long_hemisp_shaded_std
• inst_down_long_shaded_dome_temp
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• short_direct_normal_std
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• base_time
• up_long_hemisp_std
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• inst_up_long_case_temp
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• inst_up_long_dome_temp
• inst_down_long_shaded_case_temp
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• up_short_hemisp_std
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• time_offset
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• down_short_hemisp_std

SGP/SIRS/E7 - Reprocessed: Corrected downwelling longwave calibrations

While attempting to correct calibration coefficients (see D040831.2) a new datalogger 
program was loaded which applied the wrong serial number and calibration coefficients to the 
downwelling longwave measurement.

The data were reprocessed in September 2006 with the correct downwelling longwave 
calibrations and archived on 20061003.

• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• down_long_hemisp_shaded_std
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)

SGP/SIRS/E22 - Failed NIP sensor cable

The suntracker was driven past it optical limit switch and pulled the direct normal (NIP) 
instrument cable from its connector.

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)

SGP/SIRS/E7  - Reprocessing Notice (RID 287)

See below for details of reprocessing that was completed on 20150929.  Original 
DQR category: 4 (Red, Incorrect).

-----------------------------------------------------------

During the pyrgeometer instrument (PIR) changout a datalogger program was loaded with 
incorrect calibration coefficients for the shortwave instruments.  The affected measurements 
(instruments) were : downwelling diffuse (8-48), upwelling shortwave(PSP), direct normal 
(NIP) and downwelling shortwave (PSP)

Recalculate irradiances by determining original mV signal and reapplying the correct 
calibration coefficients.  For each one minute irradiance value perform the following 
calculations by instrument:
DD(corrected) = (DD/107.24)*108.50
US(corrected) = (US/113.19)*110.10
NIP(corrected)= (NIP/120.17)*122.26
DS(corrected) = (DS/118.46)*122.56

• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• short_direct_normal_std
• down_short_hemisp_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• down_short_diffuse_hemisp_std
• up_short_hemisp_std

SGP/SIRS/E8  - Reprocessing Notice (RID 291)

See below for details of reprocessing that was completed on 20150929.  Original 
DQR category: 4 (Red, Incorrect).

-----------------------------------------------------------

During the pyrgeometer instrument (PIR) changeout a datalogger program was loaded with 
incorrect calibration coefficients for the shortwave instruments.  The affected measurements 
(instruments) were: downwelling diffuse (8-48), upwelling shortwave (PSP), direct normal 
(NIP) and downwelling shortwave (PSP)

Recalculate irradiances by determining original mV signal and reapplying the correct 
calibration coefficients.  For each one minute irradiance value perform the following 
calculations by instrument:
DD(corrected) = (DD/107.24)*116.37
US(corrected) = (US/113.19)*121.78
NIP(corrected)= (NIP/120.17)*122.47
DS(corrected) = (DS/118.46)*122.34

• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• down_short_hemisp_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• short_direct_normal_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• up_short_hemisp_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• down_short_diffuse_hemisp_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)

SGP/SIRS/C1/E13 - Incorrect calibration coefficients

After the DIR changeout on 8/27, the DLH measurements at the central facility vary 
significantly between pyrgeometers by as much as 65 Wm^(-2).  It was discovered that the two 
downwelling pyrgeometers destined for C1 and E13 may have been swapped during installation.  
The instrument mentor is unsure of applied calibration coefficients during this DQR's 
time period.  Backing out new downwelling longwave irradiances would be difficult in this 
case. Fortunately, the problem period is less than a fortnight.

• inst_down_long_shaded_case_temp
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• down_long_hemisp_shaded_std
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• inst_down_long_shaded_dome_temp

SGP/SIRS/E12 - Ice obscured NIP

During the morning hours of 01/06, the direct normal shortwave readings are anomalously 
low in clear sky conditions, causing very large differences (approaching/exceeding 300 
W/m^2) between the downwelling shortwave hemispheric (DSH) readings and the derived 
downwelling shortwave hemispheric readings.  It would appear the NIP window had iced over during 
the previous days storm.  The NIP window appears to have cleared itself by the morning of 
2005/01/08.

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)

SGP/SIRS/E15 - Failed NIP cable

After the ice storm, the SHORT_DIRECT_NORMAL values were bad or
              missing continuously. Corrective Maintenance on 01/18 found
              the NIP cable had broken inside the Bendix connector. The NIP 
              cable was repaired and returned to service.

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

SGP/SIRS/E9 - Unknown -failed PSP ventilator fan

Downwelling shortwave hemispheric (DSH) readings appear to have a slight to moderate 
negative offset from derived DSH values.  At night, this negative offset causes qc flags 
(since values are below the minimum threshold of -10 W/m^2).  Differences between derived and 
actual DSH values are sometimes on the order of 50 W/m^2 due to this offset. 
The offset was discovered to be due to a failed ventilator fan which is used to clear the 
dome of the PSP, the instrument which measures the DSH.  The ventilator likely seized or 
was intermittent and heated the PSP base giving an erroneous DSH reading.  Field techs 
replaced the fan on 01/25/2005 1745GMT.  The DSH has been reading normally since that time.

• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• down_short_hemisp_std

SGP/SIRS/E20 - Reprocessed and Corrected: Incorrect calibration coefficients

DATA REPROCESSED and CORRECTED: 

Data were archived in September 2016.

SGP/SIRS/E20 - Reprocessed data to correct calibration coefficients, as noted below.

SUGGESTIONS:
Shortwave instrument measurements: Back out original mV readings and then reapply correct
calibration coefficients.
DownwellingDiffuse(corrected) = 
(DiffusePSP(incorr)[W/m2]/118.49(incorr)[W/m2*mV])*115.32[W/m2*mV)
UpwellingShortwave = (US/121.67)*126.36
DirectShortwave=(NIP/123.58)*117.99
DownwellingShortwave = (DS/119.23)*126.47

Longwave instrument measurements: Back out original mV readings from NetIR and
case and dome thermistor values from b1 file and reapply longwave eqn.
described in the SIRS handbook
(http://www.arm.gov/publications/tech_reports/handbooks/sirs_handbook.pdf
section 7)using the correct calibration coefficients.
UpwellingIRnet[uV](corrected) =
(UIRnet[W/m2]/0.23585(incorr)[W/m2*uV])*0.2371(corr)[W/m2*uV)
Then apply K0=-21.18(W/m2),K1=.2731(W/m2*uV),K2=1.0400,K3=-2.4460,Kr=7.044E-4
to the 4 coefficient eqn described in sec7 of the SIRS handbook
DownwellingIRnet[uV](corr) = (DIRnet/0.27855)*0.2455
then apply K0=-21.19(W/m2),K1=.2455(W/m2*uV),K2=1.0390,K3=-2.4910,Kr=7.044E-4 


ORIGINAL DQR CATEGORY: Red( Incorrect)

REPROCESSED and CORRECTED DATA ARCHIVED:2016-09

REPROCESS IDENTIFICATION NUMBER: RID 187

---------------------------------------------------
--- ORIGINAL DQR DESCRIPTION ---
---------------------------------------------------

Sometime during the day of 12/27/2004(first avialable day of data) or 12/24-12/26 (no 
archive data available) the SIRS datalogger at E20 was loaded with an old version of an E20 
program.  The calibration coefficients and serial numbers do not match those installed.  
Field techs installed a correct datalogger program on 1/19/2005 1900GMT.  However, 
sometime during 1/20/2005 the datalogger reverted to the wrong program again without user 
intervention.  On 2/16/2005 the correct SIRS program was reloaded on the E20 datalogger.

• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• up_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• short_direct_normal_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• up_long_hemisp_std
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• down_long_hemisp_shaded_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• down_short_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• down_short_diffuse_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)

SGP/SIRS/E15 - Ice storm

Data missing due to an ice storm.

• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• up_short_hemisp_std
• base_time
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• up_long_hemisp_std
• inst_down_long_shaded_case_temp
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• inst_down_long_shaded_dome_temp
• time_offset
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Altitude above mean sea level(alt)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• down_long_hemisp_shaded_std
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• down_short_diffuse_hemisp_std
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• inst_up_long_case_temp
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• down_short_hemisp_std
• East longitude(lon)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• North latitude(lat)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• short_direct_normal_std
• inst_up_long_dome_temp
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• vBatt

SGP/SIRS/E2 - Ice storm

Data missing due to ice storm.

• down_short_hemisp_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• East longitude(lon)
• time_offset
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• North latitude(lat)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• up_long_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• inst_down_long_shaded_dome_temp
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Altitude above mean sea level(alt)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• inst_up_long_case_temp
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• down_short_diffuse_hemisp_std
• short_direct_normal_std
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• inst_down_long_shaded_case_temp
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• vBatt
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• base_time
• inst_up_long_dome_temp
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• up_short_hemisp_std
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• down_long_hemisp_shaded_std
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)

SGP/SIRS/E8 - Ice storm

Data missing due to ice storm.

• down_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• East longitude(lon)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• time_offset
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• up_short_hemisp_std
• vBatt
• down_short_diffuse_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• inst_up_long_dome_temp
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Altitude above mean sea level(alt)
• inst_up_long_case_temp
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• inst_down_long_shaded_dome_temp
• short_direct_normal_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• base_time
• inst_down_long_shaded_case_temp
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• down_long_hemisp_shaded_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• North latitude(lat)
• up_long_hemisp_std

SGP/SIRS/E9 - Ice storm

Data missing due to ice storm.

• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• up_short_hemisp_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• inst_down_long_shaded_case_temp
• inst_down_long_shaded_dome_temp
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• time_offset
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• inst_up_long_dome_temp
• vBatt
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• up_long_hemisp_std
• East longitude(lon)
• short_direct_normal_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• down_short_hemisp_std
• base_time
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• North latitude(lat)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Altitude above mean sea level(alt)
• down_long_hemisp_shaded_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• inst_up_long_case_temp
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• down_short_diffuse_hemisp_std

SGP/SIRS/E2 - Tracker mis-alignment

The solar tracker was not working correctly at this site from 2/3/2005 to 2/5/2005 
2359GMT.  After this time tracker mounted instruments appear to have been responding correctly.  
There was no maintenance intervention that rectified the tracking problem. This has 
happened in the past with the SGP SciTec trackers.

• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_diffuse_hemisp_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• short_direct_normal_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)

SGP/SIRS/E18 - Possible PSP dome contamination

Downwelling shortwave hemispheric (DSH) measurements did not agree with derived DSH 
readings during the morning hours up to 1500GMT each clear day.   PM cleaning on 2/16 2250 
revealed nothing other than dirty water spots.  A dirty or ice covered PSP dome may have been 
the cause, clearing itself before the PM crew arrived.

• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)

SGP/SIRS/E13 - Monthly Report

:Data quality this site-month is good. The offset for the Global PSP is about -7 W/m^2.
The dominant problem here is the daytime 3 component problem. Direct and Diffuse are
always too high and Global is too low. The problem occurs around the time that the
testing regime switches from twilight to daytime testing regimes or from daytime to
twilight. The flags occur in significant numbers on the 1st - 5th, 7th - 20th, 24th - 
28th,
30th, and 31st. The failures vary in magnitude and duration. The worst flags for a 
particular

respect to this problem. Global goes below daytime empirical limits on both the 5th and
6th for substantial periods of time. Diffuse
also goes below daytime empirical limits on the 6th in the afternoon. Upwelling Longwave
is
below empirical limits on the 24th. This may not be a problem, as many sites exhibited
the same problem on the same night. Exceptionally cold temperatures may be the cause.

• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)

SGP/SIRS/E7 - Reprocessed: Corrected Downwelling Longwave calibrations

Incorrect DIR calibration coeffs and serial numbers were applied to the data from 
11/02/2004 when the shortwave instruments were changed out.  Field techs corrected the program 
during longwave instrument replacement on 2/22/2005.

The data were reprocessed in September 2006 to apply the correct calibrations.  The 
reprocessed data were archived in October 2006.

• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• down_long_hemisp_shaded_std
• inst_down_long_shaded_dome_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• inst_down_long_shaded_case_temp
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)

SGP/SIRS/E2 - Reprocessed: Incorrect DIR calibration coefficients

During the DIR/UIR instrument changeout on 2/10/2005 the new datalogger program contained 
incorrect calibration coefficients for the DIR instrument. The program was corrected on 
3/10/2005.

These data were reprocessed and archived in September 2006.

• inst_down_long_shaded_case_temp
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• inst_down_long_shaded_dome_temp
• down_long_hemisp_shaded_std
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)

SGP/SIRS/E7 - Downwelling Shortwave incorrect

Downwelling shortwave values dropped off to unrealistic values frequently 
at this site (usually between 1600 GMT and 0000 GMT).  SGP techs found this was due to a 
bad multiplexer and it was replaced 04/05/2005 1950GMT along with the downwelling 
shortwave cable.

• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std

SGP/SIRS/E9 - Downwelling Shortwave values low

Downwelling Shortwave Hemispheric (DSH) irradiance values from the pyranometer instrument 
were frequently below the MIN value of -10 W/m^2 at night.  DSH values also frequently 
disagreed with derived readings (at times well over 50 W/m^2 difference) during the 
daylight hours, especially in the morning. Field techs performed maintenance but could not find 
obvious instrument or connection problems.  

The low DSH values during nighttime were on the threshold of acceptable. Largest offsets 
acceptable with these pyranometers is typically -10 W/m2.  The large derived vs. actual 
DSH differences during the daylight hours are the subject of ongoing ARM investigation. No 
instrument problems could be identified.

• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• down_short_hemisp_std

SGP/SIRS/E12 - Reprocessed and Corrected: Incorrect calibrations

DATA REPROCESSED and CORRECTED: 

During a site corrective maintenance, the SIRS.E12 data logger was power cycled. The data 
logger reverted to an old SIRS program with incorrect S/Ns and calibration coefficients 
for all Instruments at this a station. The raw data were modified and were run through the 
ingest to recalibrate the SW and LW data.

The data were Archived in August 2016. Please retrieve the reprocessed data for use in 
your Analysis.

You may find these data using the ARM Discovery tool at the following link:
http://www.archive.arm.gov/discovery/#v/results/s/finst::sirs/fsite::sgp/ffac::sgp.E12 


ORIGINAL DQR CATEGORY: Red( Incorrect)

REPROCESSED and CORRECTED DATA ARCHIVED:2016-08

REPROCESS IDENTIFICATION NUMBER: RID 202

---------------------------------------------------
--- ORIGINAL DQR DESCRIPTION ---
---------------------------------------------------


During site corrective maintenance to resolve an Extended Facility data collection 
problem, the SIRS.E12 datalogger was power cycled (1725 GMT).  The datalogger reverted to an old 
SIRS program with incorrect S/Ns and calibration coefficients for all instruments at 
this station.

The SW data can be recalibrated as follows:
First divide value by incorrectly applied cal coeff (first number) then multiply by 
correct cal coeff (second number)
  down_short_diffuse_hemisp     107.27	118.68
  up_short_hemisp	        113.19	127.95
  short_direct_normal           120.17	120.52
  down_short_hemisp             118.46	102.11

The LW data were recalibrated and reprocessed as part of a larger LW calibration task.  
The reprocessed data were archived in October 2006.

• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• down_short_diffuse_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• down_long_hemisp_shaded_std
• inst_down_long_shaded_dome_temp
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• short_direct_normal_std
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• base_time
• up_long_hemisp_std
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• inst_up_long_case_temp
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Altitude above mean sea level(alt)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• inst_up_long_dome_temp
• inst_down_long_shaded_case_temp
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• up_short_hemisp_std
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• time_offset
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• down_short_hemisp_std

SGP/SIRS/E22 - Intermittent upwelling longwave data loss

Upwelling longwave hemispheric data drops out occasionally during the afternoon hours.  
Maintenance determined that the Upwelling LW Hemispheric irradiance instrument, the PIR, 
had a failed cable affecting only the thermopile measurement of this instrument.  Cable was 
replaced 7/20/05 2000GMT.

• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• up_long_hemisp_std

SGP/SIRS/E13 -  Reprocessed and Corrected: incorrect calibrations

DATA REPROCESSED and CORRECTED: 

After a long data gap on 05/25/2005, presumably a power outage, short_direct_normal (NIP) 
was showing incorrect value as well as incorrect calibration coefficients in the data 
logger program. The SIRS. E13 data logger was power cycled (6/2/2005 GMT) and the correct 
program loaded into the SIRS data logger and storage module. The data during this time 
range were reprocessed to apply the correct calibration coefficients for Short_direct_normal 
data.

The data were archived in September 2016. Please retrieve the reprocessed data for use in 
your analysis.

You may find these data using the ARM Discovery tool at the following link:
http://www.archive.arm.gov/discovery/#v/results/s/finst::sirs/fsite::sgp/ffac::sgp.E1 

ORIGINAL DQR CATEGORY: Red( Incorrect)

REPROCESSED and CORRECTED DATA ARCHIVED:2016-09

REPROCESS IDENTIFICATION NUMBER: RID 318

---------------------------------------------------
--- ORIGINAL DQR DESCRIPTION ---
---------------------------------------------------


After a long data gap on 5/25/2005, presumably a power outage, the following datastreams 
were showing incorrect values as well as incorrect calibration coefficients in the 
datalogger program:
down_long_hemisp_shaded (downwelling PIR instrument)
up_long_hemisp (upwelling PIR instrument)
short_direct_normal (NIP instrument)

The SIRS.E13 datalogger was power cycled (6/2/2005 2200GMT) and the correct program loaded 
into the SIRS datalogger and storage module.

The data during this time range can be recalibrated as follows:
First divide value by incorrectly applied cal coeff (first number) then multiply by 
correct cal coeff (second number)
  short_direct_normal           120.28	124.58
  up_long_netir                 0.2386	0.2595
  down_long_netir               0.3052	0.2304

Reapply cal coeffs below using up_long_netIR(uV), inst_up_long_dome_temp(K),   
inst_up_long_dome_temp(K) using procedure described in SIRS instrument manual.
  up_long_hemisp
	k0	-18.3400 W/m^2\n,
	k1	0.2595 W/(m^2*uV)\n,
	k2	1.0380 unitless\n,
	k3	-2.7420 unitless\n,
	kr	0.0007044 K/uV\n,

Reapply cal coeffs below using down_long_netIR(uV),inst_down_long_dome_temp 
(K),inst_down_long_dome_temp(K).
  down_long_hemisp_shaded	
        k0	-11.6300 W/m^2\n,
	k1	0.2304 W/(m^2*uV)\n,
	k2	1.0190 unitless\n,
	k3	-2.4230 unitless\n,
	kr	0.0007044 K/uV\n,

• inst_down_long_shaded_case_temp
• up_long_hemisp_std
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• down_long_hemisp_shaded_std
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• inst_up_long_case_temp
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• inst_up_long_dome_temp
• inst_down_long_shaded_dome_temp

SGP/SIRS/E7 - Downwelling longwave incorrect

During maintenance to correct a problem with the downwelling shortwave data, the 
downwelling longwave instrument wiring was not properly fastened resulting in incorrect 
downwelling longwave hemispheric data.

• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• down_long_hemisp_shaded_std
• inst_down_long_shaded_dome_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• inst_down_long_shaded_case_temp
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)

SGP/SIRS/E9 - Sensor cable failure

The short_direct_normal measurements from the normal incident pyrheliometer (NIP) 
instrument were missing beginning 6/13/2005 2115GMT.  On 6/20/2005 technicians found the NIP 
instrument cable broken, replaced it, and returned the instrument to service at 2200GMT.

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

SGP/SIRS/E4 - Dirt on Dome

The downwelling shortwave hemispheric radiation data are suspect.  The PSP dome appears to 
have been very dirty, especially during times when the sun angles were low.

• down_short_hemisp_std
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)

SGP/SIRS/E8 - Downwelling Shortwave hemispheric (PSP) Dome Contamination

The downelling shortwave hemispheric instrument (Eppley PSP) dome at this site had dirt or 
a smudge on it.  This was most noticeable during mid to late afternoon hours (around 
2100 GMT).  PM cleaned the dome on 8/9/05 1940, correcting the problem.

• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)

SGP/SIRS/E20 - Downwelling Shortwave PSP Damaged by Lightning

The PSP was damaged by a lightning strike on 8/04/05 (22:10 GMT).  Data from other 
radiometers are good after this event.  

The PSP, NIP and shaded 8-48 were replaced 8/17/05 and the system returned to service at 
18:40 GMT.

Downwelling Shortwave (DS) data from the unshaded PSP during this period is reported as 
0.0 W/sq m.  The DS can be computed from available Direct Normal (NIP), Downwelling Diffuse 
(DD), and the computed Solar Zenith Angle (SZA) using the following equation:

    DS = NIP * Cos(SZA) + DD

Estimated uncertainties of the computed values are actually lower than those of the 
measured DS  (+/- 3% or 4% vs. +/- 5% to 10% respectively, depending on SZA).

• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• down_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)

SGP/SIRS/E19 - Ventilator failure

Dowenlling shortwave hemispheric instrument signal (Eppley PSP) is very erratic due to 
failed ventilator fan which was replaced during PM on 04/13/2006.

• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)

SGP/SIRS/E20 - Instrument noise problem

Afer recovery from lightening strike the upwelling longwave SIRS Eppley PIR (UIR) has had 
noise on both dome and case thermistor measurements.  On 4/12/2006 techs replaced 
defective j-panel at base of tower.

• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• inst_up_long_case_temp
• inst_up_long_dome_temp
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• up_long_hemisp_std

SGP/SIRS/E8 - Instrument cable problem

The short_direct_normal, down_short_diffuse_hemisp and up_short_hemisp data are missing or 
are spiking to negative numbers.  On 20060530, technicians discovered cows had chewed on 
the instrument cables.

• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• short_direct_normal_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• up_short_hemisp_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• down_short_diffuse_hemisp_std

SGP/SIRS/E2 - Reprocessed: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in February 2004. 
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.

The data collected while the incorrect procedures were in place have been reprocessed to 
remove the calibration bias.  The reprocessed 60 second averaged data are based on 3 
instantaneous 20 second data records rather than on 60 1 second instanteous data records.  
Still, these data are considered far superior to the originally processed data.  The 
reprocessed data were archived in September 2006.

• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)

SGP/SIRS/E4 - Reprocessed: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in March 2004. 
These modified procedures introduced a calibration bias in the longwave data. The previous 
procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.

The data collected while the incorrect procedures were in place have been reprocessed to 
remove the calibration bias.  The reprocessed 60 second averaged data are based on 3 
instantaneous 20 second data records rather than on 60 1 second instantaneous data records.  
Still, these data are considered far superior to the originally processed data. The 
reprocessed data were archived in October 2006.

• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)

SGP/SIRS/E7 - Reprocessed: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in February 2004. 
These modified procedures introduced a calibration bias in the longwave data. The previous 
procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.

The data collected while the incorrect procedures were in place have been reprocessed to 
remove the calibration bias.  The reprocessed 60 second averaged data are based on 3 
instantaneous 20 second data records rather than on 60 1 second instantaneous data records.  
Still, these data are considered far superior to the originally processed data. The 
reprocessed data were archived in October 2006.

• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)

SGP/SIRS/E8 - Reprocessed: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in February 2004.  
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.

The data collected while the incorrect procedures were in place have been reprocessed to 
remove the calibration bias.  The reprocessed 60 second averaged data are based on 3 
instantaneous 20 second data records rather than on 60 1 second instanteous data records. 
Still, these data are considered far superior to the originally processed data. The 
reprocessed data were archived in September 2006.

• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)

SGP/SIRS/E9 - Reprocessed: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in December 2003. 
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.

The data collected while the incorrect procedures were in place have been reprocessed to 
remove the calibration bias.  The reprocessed 60 second averaged data are based on 3 
instantaneous 20 second data records rather than on 60 1 second instanteous data records. 
Still, these data are considered far superior to the originally processed data. The 
reprocessed data were archived in October 2006.

• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)

SGP/SIRS/E12 - Reprocessed: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in July 2003. These 
modified procedures introduced a calibration bias in the longwave data. The previous 
procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations. 

The data collected while the incorrect procedures were in place have been reprocessed to 
remove the calibration bias.  The reprocessed 60 second averaged data are based on 3 
instantaneous 20 second data records rather than on 60 1 second instantaneous data records. 
Still, these data are considered far superior to the originally processed data. The 
reprocessed data were archived in October 2006.

• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)

SGP/SIRS/E13 - Reprocessed: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in December 2003. 
These modified procedures introduced a calibration bias in the longwave data. The previous 
procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations. 

The data collected while the incorrect procedures were in place have been reprocessed to 
remove the calibration bias.  The reprocessed 60 second averaged data are based on 3 
instantaneous 20 second data records rather than on 60 1 second instantaneous data records. 
Still, these data are considered far superior to the originally processed data. The 
reprocessed data were archived in October 2006.

• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)

SGP/SIRS/E15 - Reprocessed: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in July 2003. These 
modified procedures introduced a calibration bias in the longwave data. The previous 
procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.

The data collected while the incorrect procedures were in place have been reprocessed to 
remove the calibration bias.  The reprocessed 60 second averaged data are based on 3 
instantaneous 20 second data records rather than on 60 1 second instantaneous data records.  
Still, these data are considered far superior to the originally processed data. The 
reprocessed data were archived in October 2006.

• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)

SGP/SIRS/E18 - Reprocessed: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in July 2003. These 
modified procedures introduced a calibration bias in the longwave data. The previous 
procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations. 

The data collected while the incorrect procedures were in place have been reprocessed to 
remove the calibration bias.  The reprocessed 60 second averaged data are based on 3 
instantaneous 20 second data records rather than on 60 1 second instantaneous data records. 
Still, these data are considered far superior to the originally processed data. The 
reprocessed data were archived in October 2006.

• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)

SGP/SIRS/E19 - Reprocessed: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in July 2003. These 
modified procedures introduced a calibration bias in the longwave data. The previous 
procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations. 

The data collected while the incorrect procedures were in place have been reprocessed to 
remove the calibration bias.  The reprocessed 60 second averaged data are based on 3 
instantaneous 20 second data records rather than on 60 1 second instantaneous data records. 
Still, these data are considered far superior to the originally processed data. The 
reprocessed data were archived in October 2006.

• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)

SGP/SIRS/E20 - Reprocessed: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in July 2003. These 
modified procedures introduced a calibration bias in the longwave data. The previous 
procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations. 

The data collected while the incorrect procedures were in place have been reprocessed to 
remove the calibration bias.  The reprocessed 60 second averaged data are based on 3 
instantaneous 20 second data records rather than on 60 1 second instantaneous data records. 
Still, these data are considered far superior to the originally processed data. The 
reprocessed data were archived in November 2006.

• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)

SGP/SIRS/E22 - Reprocessed: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in July 2003.  
These modified procedures introduced a calibration bias in the longwave data.  The previous 
procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.    
                                                                         
The data collected while the incorrect procedures were in place have been reprocessed to 
remove the calibration bias.  The reprocessed 60 second averaged data are based on 3 
instantaneous 20 second data records rather than on 60 1 second instantaneous data records. 
Still, these data are considered far superior to the originally processed data. The 
reprocessed data were archived in August 2006.

• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)

SGP/SIRS/E9 - Tracker Failure

On July 12th the SIRS tracker failed to wake up that morning.  On the 21st of July CM 
repaired the tracker.

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• short_direct_normal_std
• down_short_diffuse_hemisp_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

SGP/SIRS/E18 - Upwelling SW cable severed

The Upwelling Shortwave signal was exceeding physical limits.  Ops reported the upwelling 
shortwave cable was damaged by rodents. The cable was repaired and returned to service.

• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• up_short_hemisp_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)

SGP/SIRS/E7 - Instrument noise

Beginning around 10/31, the E7 UIR experienced an increasingly noisy signal.  The 
thermopile signal was noisy, but case and dome thermistors are well behaved.  Maintenance 
reseated the UIR cable connections on 12/12/2006 which effectively eliminated the UIR noise.

The thermopile data from the upwelling pyrgeometer is noisy with resulting irradiance 
variations of up to 5 W/m2, but doesn't appear to have a bias.

• up_long_hemisp_std
• inst_up_long_dome_temp
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• inst_up_long_case_temp
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)

SGP/SIRS/E20 - Noise in Upwelling longwave data

Starting on 12/3/2006 there was occasional noise in the upwelling longwave case thermistor 
measurement adversely affecting the upwelling longwave irradiance measurements. The 
cable was replaced.

• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• up_long_hemisp_std

SGP/SIRS/E18 - Noise in upwelling longwave data

After restart due to ice storm the upwelling longwave case and dome thermistors 
experienced intermittent noise. Last seen 7/24/2007, the noise is intermittent and can last several 
days.  When noise is not apparent, upwelling longwave measurements appear normal.

Only using upwelling longwave data that has been processed with ARMs qcrad VAP during this 
time period.  Or, disregard upwelling longwave data during this time.

• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• up_long_hemisp_std

SGP/SIRS/E9 - Tracker failure

During this time range the solar tracker at E9 was not operating.  PM on 2/20 1800GMT 
power cycled the tracker and it resumed normal operation.

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• short_direct_normal_std
• down_short_diffuse_hemisp_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

SGP/SIRS/E22 - Reprocessed and Corrected: Incorrect calibration coefficients

DATA REPROCESSED and CORRECTED: 

NIP (short_direct_normal) 29541E6 had an incorrect calibration coefficient in the logger 
program. The correct calibration should have been 126.67 [W/m2/mV] instead of 128.97. The 
correct calibration was calculated as NIPIrr(cor) = NIPIrr(orig) * (126.67/128.97) = 
NIP(orig) * 0.982166

The data were archived in October 2016. Please retrieve the reprocessed data for use in 
your analysis.

You may find these data using the ARM Discovery tool at the following link:
http://www.archive.arm.gov/discovery/#v/results/s/finst::sirs/fsite::sgp/ffac::sgp.E22


ORIGINAL DQR CATEGORY:  Red (Incorrect)

REPROCESSED and CORRECTED DATA ARCHIVED:2016-10

REPROCESS IDENTIFICATION NUMBER: RID 387

---------------------------------------------------
--- ORIGINAL DQR DESCRIPTION ---
---------------------------------------------------

NIP (short_direct_normal) 29541E6 had an incorrect calibration coefficient in the logger 
program. 128.97 should have been 126.67 [W/m2/mV].

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)

SGP/SIRS/E9 - Downwelling SW cable problem

The down_short_diffuse_hemispheric data were erratic beginning 0109 GMT March 27 2007.  
Found rodents had chewed DD cable.  Repaired April 3rd 1625GMT.

Data are not recoverable. However, it can be reconstructed using the following shortwave 
instrument relationship on a minute by minute basis:

• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• down_short_diffuse_hemisp_std

SGP/SIRS/E7 - SIRS Power supply problems

Power supply problems to SIRS datalogger resulted in logger voltage dropping below minimum 
for operation.  During these time ranges the datalogger was either not operating or 
operating intermittantly as battery voltage would go above and below logger voltage threshold 
of approx 9VDC.

• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• inst_up_long_case_temp
• short_direct_normal_std
• down_short_hemisp_std
• base_time
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• inst_up_long_dome_temp
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• inst_down_long_shaded_case_temp
• time_offset
• North latitude(lat)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• down_short_diffuse_hemisp_std
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_long_hemisp_shaded_std
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• East longitude(lon)
• Altitude above mean sea level(alt)
• up_long_hemisp_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• inst_down_long_shaded_dome_temp
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• vBatt
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• up_short_hemisp_std

SGP/SIRS/E15 - NIP (short_direct_normal) failure

Short_direct_normal was spiking to large positive and negative values (+2000/-2000) with 
extended periods of missing data.  Repair of broken cable corrected the problem.

Data are not recoverable.  Suggest using remaining components (global hemispheric and 
global diffuse) to reconstruct direct normal data during this time period.   See SIRS 
instrument handbook for details on this process.

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

SGP/SIRS/E7 - Downwelling shortwave data dropouts

The down_short_hemisp data was dropping out to negative numbers and had high negative 
offsets.  PM techs reseated the cable connections and found the ventilator fan had failed.

• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std

SGP/SIRS/E18 - NIP cable failure

NIP cable failed and was repaired on 11/6 2155.

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)

SGP/SIRS/E20 - Failed tracker and improperly configured tracker

On 1/15/2007 the E20 tracker failed due to weather.  On 3/14 it was replaced but 
configured incorrectly (presumably the wrong lat/long).  This wasn't discovered and corrected 
until 6/6/2007 1745GMT.
All shortwave instruments dependent on proper tracker were affected.  This includes 
measurements: downwelling shortwave diffuse and direct normal.  Additionally, the global 
shortwave instrument have also been shaded during the second time range due to improperly set 
tracker.

• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• short_direct_normal_std
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• down_short_hemisp_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• down_short_diffuse_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

SGP/SIRS/E12 - Power supply problem affecting solar tracker

The tracker failed during this time period due to a failed UPS.  Tracker was placed on 
unregulated power on 8/31/2007 to correct the problem while a new UPS was ordered.

• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• down_short_diffuse_hemisp_std
• short_direct_normal_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)

SGP/SIRS/E19 - Reprocessed and Corrected: Incorrect calibration coefficients

DATA REPROCESSED and CORRECTED: 

Sometime on 10/13 the SIRS data logger reverted to the old program used for the Previous 
set of coefficients (i.e. Before the scheduled 09/13 shortwave instrument swap out). 
Coefficients were such that the program change didn't result in easily discernible changes in 
the Data. The long wave instruments were not affected. The data were reprocessed to apply 
the correct calibration coefficients for all shortwave measurements.

The data were archived in October 2016. Please retrieve the reprocessed data for use in 
your analysis.

You may find these data using the ARM Discovery tool at the following link:
http://www.archive.arm.gov/discovery/#v/results/s/finst::sirs/fsite::sgp/ffac::sgp.E19 

ORIGINAL DQR CATEGORY:	Red (Incorrect)

REPROCESSED and CORRECTED DATA ARCHIVED:2016-10

REPROCESS IDENTIFICATION NUMBER: RID 491

---------------------------------------------------
--- ORIGINAL DQR DESCRIPTION ---
---------------------------------------------------

Sometime on 10/13 the SIRS datalogger reverted to the old program used for the previous 
set of coefficients (i.e. before the scheduled 9/13 shortwave instrument swapout).  
Coefficients were such that the program change didn't result in easily discernable changes in 
the data. The longwave instruments were not affected.
The Coefficients applied during this time were as follows (marked "Incorrect"):
Incorrect    "Diffuse PSP: 106.83 W/(m^2*mV)\n",
Correct      "Diffuse PSP: 113.35 W/(m^2*mV)\n",
Incorrect    "PSP-US:      119.40 W/(m^2*mV)\n",
Correct      "PSP-US:      117.97 W/(m^2*mV)\n",
Incorrect    "NIP:         120.41 W/(m^2*mV)\n",
Correct      "NIP:         121.72 W/(m^2*mV)\n",
Incorrect    "PSP-DS:      120.26 W/(m^2*mV)\n",
Correct      "PSP-DS:      122.52 W/(m^2*mV)\n",

Shortwave data can be corrected by dividing by "Incorrect" coefficient and multiplying 
"Correct" coefficient.  (e.g. down_short_diffuse_hemisp(cor) = 
down_short_diffuse_hemisp*(113.35/106.83))

• up_short_hemisp_std
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• down_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• short_direct_normal_std
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• down_short_diffuse_hemisp_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)

SGP/SIRS/E22 - Tracker failure

The E22 tracker failed during the specified time periods.  Power cycling the tracker 
restored normal operation both times.  Adversely affected instruments are the 
down_short_diffuse (8-48) and short_direct_normal (NIP).

• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• short_direct_normal_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• down_short_diffuse_hemisp_std

SGP/SIRS/E12 - Failed ventilator fan

Ventilator fan for the downwelling shortwave hemisheric failed during this time period.  
The thermal effects of daytime heating will skew the radiometric measurements of the 
thermopile instrument.

• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• down_short_hemisp_std

SGP/SIRS/E18 - Instrument noise problem

Starting May 12th 2007 DIR experiencing persistent, intermittent data dropouts and noise.  
PM found a damaged PIR cable and repaired 01/02/08 2240GMT. 

Noise seems to be unbiased and dropouts are beyond QC limits making QC flags a possible 
option in filtering for good data. However, using data during this period is not 
recommended.

• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• down_long_hemisp_shaded_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)

SGP/SIRS/E19 - Tracker failure

On the evening of May 28th (5/29 0145) the E19 suntracker rewound past its limit switches 
breaking the downwelling diffuse instrument cable.  It did not move again until PM found 
it nonoperational and reset it on June 6th.

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• down_short_diffuse_hemisp_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)

SGP/SIRS/E13 - Multiplexer failure

The down_short_hemisp (PSP), down_long_hemisp_shaded (DIR) and up_long_hemisp (UIR) 
experienced frequent dropouts due to a failing multiplexer.  CM replaced mux on 1/7.

• inst_down_long_shaded_case_temp
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• down_short_hemisp_std
• up_long_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• down_long_hemisp_shaded_std
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• inst_up_long_case_temp
• inst_up_long_dome_temp
• inst_down_long_shaded_dome_temp

SGP/SIRS/C1/E1/E10/E11/E12/E13/E15/E16/E18/E19/E2/E20/E21/E22/E24/E25/E27/E3/E4/E5/E6/E7/E8/E9 - Ice

Ice storms affected the SGP central and extended facilities starting Dec 10 0000GMT to 
mid/late December. Each facility was affected at various times and degrees dependant on 
elevation, latitude and whether power failed for short or extended periods of time.  By 
December 15th most ice had melted from the radiometers at all the faclities but power outages 
and tracker failures persisted at some stations.

• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• North latitude(lat)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• down_long_hemisp_shaded_std
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• time_offset
• vBatt
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• base_time
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• inst_down_long_shaded_dome_temp
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• inst_up_long_dome_temp
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• inst_up_long_case_temp
• East longitude(lon)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• Altitude above mean sea level(alt)
• down_short_hemisp_std
• inst_down_long_shaded_case_temp
• up_short_hemisp_std
• down_short_diffuse_hemisp_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• short_direct_normal_std
• up_long_hemisp_std
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)

• down_short_hemisp_std
• inst_up_long_dome_temp
• up_short_hemisp_std
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• short_direct_normal_std
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• inst_down_long_shaded_dome_temp
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• North latitude(lat)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• inst_down_long_shaded_case_temp
• down_long_hemisp_shaded_std
• base_time
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Altitude above mean sea level(alt)
• time_offset
• up_long_hemisp_std
• down_short_diffuse_hemisp_std
• vBatt
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• inst_up_long_case_temp
• East longitude(lon)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)

• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• base_time
• Altitude above mean sea level(alt)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• vBatt
• short_direct_normal_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• inst_down_long_shaded_dome_temp
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• up_short_hemisp_std
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• time_offset
• down_short_diffuse_hemisp_std
• inst_down_long_shaded_case_temp
• East longitude(lon)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• down_short_hemisp_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• inst_up_long_dome_temp
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• inst_up_long_case_temp
• North latitude(lat)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• down_long_hemisp_shaded_std
• up_long_hemisp_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)

• inst_up_long_dome_temp
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• down_long_hemisp_shaded_std
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• time_offset
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• inst_down_long_shaded_case_temp
• up_long_hemisp_std
• inst_up_long_case_temp
• North latitude(lat)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• down_short_hemisp_std
• down_short_diffuse_hemisp_std
• inst_down_long_shaded_dome_temp
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• vBatt
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• short_direct_normal_std
• Altitude above mean sea level(alt)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• base_time
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• up_short_hemisp_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• East longitude(lon)

• Altitude above mean sea level(alt)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• inst_down_long_shaded_dome_temp
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• down_short_hemisp_std
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• base_time
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• North latitude(lat)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• up_short_hemisp_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• down_long_hemisp_shaded_std
• vBatt
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_diffuse_hemisp_std
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• short_direct_normal_std
• up_long_hemisp_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• inst_up_long_dome_temp
• time_offset
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• inst_up_long_case_temp
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• inst_down_long_shaded_case_temp
• East longitude(lon)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)

• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• short_direct_normal_std
• down_short_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• down_short_diffuse_hemisp_std
• down_long_hemisp_shaded_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• East longitude(lon)
• up_long_hemisp_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• inst_down_long_shaded_dome_temp
• Altitude above mean sea level(alt)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• up_short_hemisp_std
• inst_down_long_shaded_case_temp
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• base_time
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• vBatt
• time_offset
• North latitude(lat)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• inst_up_long_case_temp
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• inst_up_long_dome_temp
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)

• vBatt
• short_direct_normal_std
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• up_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• down_long_hemisp_shaded_std
• inst_up_long_case_temp
• up_long_hemisp_std
• inst_down_long_shaded_case_temp
• East longitude(lon)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• inst_up_long_dome_temp
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• base_time
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• down_short_hemisp_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• time_offset
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Altitude above mean sea level(alt)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• North latitude(lat)
• inst_down_long_shaded_dome_temp
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• down_short_diffuse_hemisp_std

• base_time
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• time_offset
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• up_short_hemisp_std
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• North latitude(lat)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• down_short_diffuse_hemisp_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• vBatt
• down_long_hemisp_shaded_std
• inst_up_long_dome_temp
• inst_down_long_shaded_dome_temp
• inst_down_long_shaded_case_temp
• inst_up_long_case_temp
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• down_short_hemisp_std
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• short_direct_normal_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• East longitude(lon)
• up_long_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Altitude above mean sea level(alt)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)

• down_short_diffuse_hemisp_std
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• North latitude(lat)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• time_offset
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• inst_down_long_shaded_case_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• inst_down_long_shaded_dome_temp
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• up_long_hemisp_std
• inst_up_long_case_temp
• vBatt
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Altitude above mean sea level(alt)
• base_time
• up_short_hemisp_std
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• down_short_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• down_long_hemisp_shaded_std
• short_direct_normal_std
• inst_up_long_dome_temp
• East longitude(lon)

• down_long_hemisp_shaded_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• inst_down_long_shaded_dome_temp
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• short_direct_normal_std
• inst_down_long_shaded_case_temp
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• up_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• inst_up_long_case_temp
• North latitude(lat)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• vBatt
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• up_long_hemisp_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• inst_up_long_dome_temp
• East longitude(lon)
• base_time
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Altitude above mean sea level(alt)
• time_offset
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• down_short_diffuse_hemisp_std
• down_short_hemisp_std
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)

• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• up_long_hemisp_std
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• inst_up_long_case_temp
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Altitude above mean sea level(alt)
• down_short_hemisp_std
• time_offset
• up_short_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• down_short_diffuse_hemisp_std
• down_long_hemisp_shaded_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• vBatt
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• inst_up_long_dome_temp
• East longitude(lon)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• North latitude(lat)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• inst_down_long_shaded_case_temp
• inst_down_long_shaded_dome_temp
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• base_time
• short_direct_normal_std
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)

• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• inst_down_long_shaded_case_temp
• up_short_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• North latitude(lat)
• East longitude(lon)
• base_time
• down_short_diffuse_hemisp_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Altitude above mean sea level(alt)
• vBatt
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• short_direct_normal_std
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• inst_down_long_shaded_dome_temp
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• down_short_hemisp_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• inst_up_long_dome_temp
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• down_long_hemisp_shaded_std
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• inst_up_long_case_temp
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• up_long_hemisp_std
• time_offset

SGP/SIRS/E4 - UPS failure

On Jan 13th approximately 1400GMT the UPS failed at E4. This affected both the global and 
tracker mounted instruments. The affected measurements are down_short_hemisp(PSP), 
down_short_diffuse(8-48) and direct_normal(NIP) measurements.  The PSP down_short_hemisp 
measurement doesn't rely on the tracker but is power ventilated and is adversely affected by 
daytime solar heating when the ventilator power fails.

• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• down_short_hemisp_std
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• down_short_diffuse_hemisp_std
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std

SGP/SIRS/E18 - NIP condensation problem

NIP at E18 was measuring impossible values due to condensation on inside of NIP window.  
PM replaced NIP 2/26/2008 2150.

Measured data are not recoverable.  Use component sum method to reconstruct NIP data.  NIP 
= (Global-Diffuse)/cos(ZA)

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)

SGP/SIRS/E7 - Downwelling Shortwave failure

The downwelling shortwave (Global PSP) values were dropping out.  Problem started 2/4 but 
became persistent 3/9 and continued until replacement of Mux on 5/15.

PSP data (down_short_hemisp) is not recoverable but can be calculated using:
global = direct*cos(zenith angle) + diffuse 

See the SIRS instrument handbook for details of this component sum method.

• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std

SGP/SIRS/E4 - Tracker failure

On 4/2, the station experienced a power drop after which the tracker was not operational 
until it was reset on 5/1.

The short_direct_normal (NIP instrument) and down_short_diffuse_hemispheric (8-48 
instrument) data were bad during this time.  The down_long_hemispheric (PIR) and 
down_short_hemispheric were unaffected by this failure.  Upwelling instruments were also unaffected.  
Three component DQ checks were not valid during this time.

• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• down_short_diffuse_hemisp_std
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std

SGP/SIRS/E20 - Intermittent missing data

Data are intermittent during the time period specified.  Missing data are not recoverable. 
 Available data are satisfactory.

• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• up_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• base_time
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• inst_up_long_dome_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• East longitude(lon)
• short_direct_normal_std
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• inst_down_long_shaded_dome_temp
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• North latitude(lat)
• up_long_hemisp_std
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• inst_down_long_shaded_case_temp
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Altitude above mean sea level(alt)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• down_long_hemisp_shaded_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• inst_up_long_case_temp
• time_offset
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• down_short_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• down_short_diffuse_hemisp_std
• vBatt
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)

SGP/SIRS/E22 - Tracker failure

During the time ranges specified the SIRS solar tracker had failed for unspecified 
reasons.  Measurements of short_direct_normal (NIP) and down_short_diffuse_hemisp (8-48) are 
incorrect and not recoverable. Longwave data are unaffected.

• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• short_direct_normal_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• down_short_diffuse_hemisp_std

SGP/SIRS/E20 - Missing data

Data are missing and unrecoverable.

• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• up_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• base_time
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• inst_up_long_dome_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• East longitude(lon)
• short_direct_normal_std
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• inst_down_long_shaded_dome_temp
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• North latitude(lat)
• up_long_hemisp_std
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• inst_down_long_shaded_case_temp
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Altitude above mean sea level(alt)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• down_long_hemisp_shaded_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• inst_up_long_case_temp
• time_offset
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• down_short_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• down_short_diffuse_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• vBatt

SGP/SIRS/E4 - Tracker inoperative

Tracker was inoperative at this site 6/04 to 6/25 for unknown reasons.  PM power cycled 
and reloaded program 6/25 1607 GMT.

The short_direct_normal (NIP) and down_short_diffuse_hemisp (8-48) data are bad during 
this time and are not recoverable.

• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• down_short_diffuse_hemisp_std
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std

SGP/SIRS/E8 - Ventilator Fan Failure

At the start time specified the PSP (down_short_hemisp) ventilator fan failed. PM replaced 
the fan 7/8/2008 1750.  Ventilator failure does adversely affect radiometer measurements 
but the extent has not been quantified.  Mentor suggests using component sum method 
detailed in SIRS instrument handbook where down_short_hemisp = down_short_diffuse + 
short_direct_normal * cos (zenith angle) for each time record.

• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)

SGP/SIRS/E18 - Ventilator Fan Failure

At the start time specified the PSP (down_short_hemisp) ventilator fan failed. PM replaced 
the fan 6/30/2008 2110.  Ventilator failure does adversely affect radiometer 
measurements but the extent has not been quantified.  Mentor suggests using component sum method 
detailed in SIRS instrument handbook where down_short_hemisp = down_short_diffuse + 
short_direct_normal * cos (zenith angle) for each time record.

• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)

SGP/SIRS/E9 - Intermittent downwelling diffuse data

The downwelling diffuse (8-48) data were dropping out intermittently beginning on the 
night of 8/5. Ops repaired damaged cable on 11/12 but problem was last observed on 10/27.

• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• down_short_diffuse_hemisp_std

SGP/SIRS/E4 - Tracker inoperative

Tracker failed on 04/02 until reset by Ops on 5/13.  This adversely affected 
down_short_diffuse_hemisp and short_direct_normal data.  Data are not recoverable.

• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• down_short_diffuse_hemisp_std
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std

SGP/SIRS/E9 - Incorrect timestamp

The data collection computer lost communication with GPS for the affected time period at 
this site. The instrument time is not correct causing the data to be up to 30 minutes 
behind actual time by the end of the affected time period.  The time shift is not linear and 
no known time correction could be applied to the affected data streams.
More information is available contained in PIF P090429.1

• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• up_short_hemisp_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• inst_down_long_shaded_case_temp
• inst_down_long_shaded_dome_temp
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• time_offset
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• inst_up_long_dome_temp
• vBatt
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• up_long_hemisp_std
• East longitude(lon)
• short_direct_normal_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• down_short_hemisp_std
• base_time
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• North latitude(lat)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Altitude above mean sea level(alt)
• down_long_hemisp_shaded_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• inst_up_long_case_temp
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• down_short_diffuse_hemisp_std

SGP/SIRS/E12 - NIP failure

The short_direct_normal values are mostly missing (-9999) starting when the datastream 
came back from an extended period of no data files.  Ops determined the NIP 
(short_direct_normal datastream) instrument had failed and it was replaced.

Values of short_direct_normal can be reconstructed using the following relationship 
applied for each time period:
short_direct_normal = (down_short_hemisp - down_short_diffuse)/cos (zenith angle)

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)

SGP/SIRS/E7 - NIP failure

The short_direct_normal data were reported as -9999 during this time period. The start of 
the bad data from the NIP instrument on 05/12 coincides with a SMOS report of 2 inches of 
rain.  

NIP data are not recoverable. Users can calculate short_direct normal component using 
component sum method as follows (for each minute of available data):

short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle)

• short_direct_normal_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)

SGP/SIRS/E18 - Tracker failure

The solar tracker was not operating during this time period.  The  short_direct_normal 
(NIP), down_short_diffuse_hemisp (8-48) were affected by the failure and should not be used. 

The PIR instrument should not be affected (down_long_hemisp_shaded) during this time.

• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• down_short_diffuse_hemisp_std

SGP/SIRS/E9 - Tracker failure

The solar tracker was not functioning during these periods. During both failure events PM 
found the solar tracker in its parked position. PM reset the tracker and it resumed 
normal operations.

Data from instruments directly reliant on tracker operations (short_direct_normal, 
down_short_diffuse_hemisp) are not recoverable. The longwave data should not be affected.

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• short_direct_normal_std
• down_short_diffuse_hemisp_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

SGP/SIRS/E18 -  Reprocessed and Corrected: Incorrect calibrations

DATA REPROCESSED and CORRECTED: 

During instrument changeout the intended down_short_hemisp PSP and up_short_hemisp PSP 
were swapped resulting in incorrectly applied calibration coefficients. The problem was 
corrected by swapping the instruments into their proper positions. The correct calibration 
coefficients were applied to upwelling and downwelling shortwave measurements and the data 
were reprocessed.

The data were archived in August 2016. Please retrieve the reprocessed data for use in 
your analysis.

You may find these data using the ARM Discovery tool at the following link:
http://www.archive.arm.gov/discovery/#v/results/s/finst::sirs/fsite::sgp/ffac::sgp.E18


ORIGINAL DQR CATEGORY: Red( Incorrect)

REPROCESSED and CORRECTED DATA ARCHIVED:2016-08

REPROCESS IDENTIFICATION NUMBER: RID 605

---------------------------------------------------
--- ORIGINAL DQR DESCRIPTION ---
---------------------------------------------------


During instrument changeout the intended down_short_hemisp PSP and up_short_hemisp PSP 
were swapped resulting in incorrectly applied calibration coefficients.  The problem was 
corrected by swapping the instruments into their proper positions.

Data will be reprocessed to apply correct calibrations: 
  down_short_hemisp(cor)= down_short_hemisp(old)*[115.87/123.33]
  up_short_hemisp(cor)= up_short_hemisp(old)*[123.33/115.87]

• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• up_short_hemisp_std
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)

SGP/SIRS/E18 - Dirt on dome

It appears that the PSP dome was dirty.  There was a noticeable dip in down_short_hemisp 
values from 13:53 to 14:31 UTC every day after 09/26. 

This facility was decommissioned and maintenance efforts ceased 10/1/2009.  The instrument 
was removed from service 11/17/2009.

• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)

SGP/SIRS/E7 - Upwelling Longwave inconsistent

The upwelling IR PIR instrument (up_long_hemisp) had bad connections during this time 
period.  The case thermistor (Mux set #2) was reading erratic values and corrupting the 
up_long_hemisp data completely. 

The net_ir was valid but cannot be corrected without the case thermistor measurement to 
determine the incoming IR (i.e. up_long_hemisp).

• up_long_hemisp_std
• inst_up_long_dome_temp
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• inst_up_long_case_temp
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)

SGP/SIRS/E9 - Downwelling SW sensor alignment/level

On clear days, the down_short_hemisp data (PSP instrument) exhibit asymmetry in its daily 
output curve especially when compared to derived downwelling shortwave.  Ops corrected 
the problem by re-leveling the PSP on 3/16/2010. The issue may likely be due to a slowly 
sinking platform at this site or inadvertent loosening of instrument hold down screws.  

Problem may have developed slowly over the last year.  Corrections are not easily 
quantifiable.  Suggest using derived downwelling shortwave which is not dependent on the PSP 
instrument:

derived DS = down_short_diffuse + short_direct_normal * cos(zenith angle)

• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• down_short_hemisp_std

SGP/SIRS/E9 - TimeCheck Error

The sgp.E9 instruments (EBBR, MET, SIRS, SWATS) time clocks were drifting outside the 
allowable +/-3 seconds.  During the specified period, the swings ranged from -326 to +637 
seconds.  This period was around sunset May 6th (local time) and in the few hours 
immediately after sunset.

• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• up_short_hemisp_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• inst_down_long_shaded_case_temp
• inst_down_long_shaded_dome_temp
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• time_offset
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• inst_up_long_dome_temp
• vBatt
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• up_long_hemisp_std
• East longitude(lon)
• short_direct_normal_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• down_short_hemisp_std
• base_time
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• Irradiance, shortwave, upwelling, hemispheric, 10 meter(up_short_hemisp)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• North latitude(lat)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Altitude above mean sea level(alt)
• down_long_hemisp_shaded_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• inst_up_long_case_temp
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• down_short_diffuse_hemisp_std

SGP/SIRS/E7 - NIP connector failure

After instrument replacement 8/5/2010 approx 1700GMT the short_direct_normal values became 
intermittent due to a failed NIP connector. Ops repaired the connector on 8/10 
rectifying the problem.

The short_direct_normal (NIP instrument) data are not recoverable during this period. 
Although there will be greater uncertainty the short_direct_normal can be reconstructed from 
the global and diffuse measurements for each minute of 
data using the following relationship:
down_short_hemisp = short_direct_normal*cos(zenith angle) + down_short_diffuse.

• short_direct_normal_std
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)

SGP/SIRS/E19 - Instrument mux problem

Beginning 7/31, the upwelling_longwave_hemispheric data were intermittent with periods of 
erratic and missing data typically during daylight hours. A multiplexer was found to be 
the problem and replaced 8/31 1630GMT.

• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• up_long_hemisp_std
• inst_up_long_dome_temp
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• inst_up_long_case_temp
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)

SGP/SIRS/E19 - Intermittent bad data

From 9/21 to 10/10 0015GMT the DSH (down_short_hemisp) values were intermittently missing 
while simultaneously ULH (up_long_hemisp) and DLHS (down_long_hemisp_shaded) values were 
much lower than possible values.  This problem was attributed to an unidentified mux 
related problem. Although the problem did not recur after 10/10, the mux was replaced on 11/03.

The problem was intermittent, occurring for significant parts of each day. The QC flags 
appear to adequately flag bad data.

• down_long_hemisp_shaded_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• Irradiance, shortwave, downwelling, hemispheric, pyranometer, minima(down_short_hemisp_min)
• inst_up_long_dome_temp
• down_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Maxima(down_short_hemisp_max)
• inst_up_long_case_temp
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• up_long_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• inst_down_long_shaded_case_temp
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• inst_down_long_shaded_dome_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Downwelling shortwave hemispheric irradiance, pyranometer(down_short_hemisp)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)

SGP/SIRS/E15 - NIP failure

The short_direct_normal (NIP instrument) cable failed during this time period.  Data are 
not recoverable.

Users can derive an estimate of direct normal values using the following formula:
short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle)

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

SGP/SIRS/E13 - NIP damaged by lightning strike

Apparent lightning strike in the instrument cluster area resulted in a failed NIP. The 
SIRS was due for calibration change outs so the US, DS, DD and NIP were replaced. The 
updated program was loaded at approximately 1730 GMT.

An estimate of direct normal values can be derived using the following formula:

short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle)

• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)

SGP/SIRS/E20 - Upwelling LW incorrect

The UIR signal (up_long_hemisp datastream) had connection and cabling problems during the 
time period specified.  Site ops personnel replaced the Multiplexer on 6/15/2011 at 19:00 
resolving the problem.

• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• inst_up_long_case_temp
• inst_up_long_dome_temp
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• up_long_hemisp_std

SGP/SIRS/E20 - Downwelling LW incorrect

The downwelling longwave hemispheric shaded (down_long_hemisp_shaded ) values periodically 
were missing or incorrect. Connections on the Multiplexer were reseated on 7/13/2011 at 
18:11 resolving the problem.

• inst_down_long_shaded_case_temp
• inst_down_long_shaded_dome_temp
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer(down_long_hemisp_shaded)
• down_long_hemisp_shaded_std
• Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer, mifkba(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)

SGP/SIRS/E13 - Intermittent upwelling longwave

Beginning 9/19/2011 @ 15:12, the upwelling longwave values are often spiking to large and 
small values throughout the day. A multiplexer was found to be the problem and the ops 
replaced it on 10/27/2011.

Incorrect data are not recoverable for the specified time range. However, good data exists 
within the time range.  The SGPQCRAD VAP data stream provides flags for "good" data and 
appears to accurately flag bad data during this time range. Users are advised to use this 
data stream to screen for correct up_long_hemisp values.

• up_long_hemisp_std
• inst_up_long_case_temp
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• inst_up_long_dome_temp
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)

SGP/SIRS/E9 - Tracker failure

The solar tracker was not functioning during these periods. OPS found the solar tracker 
not running, power cycled suntracker and it normal operations resumed. 

Data from instruments directly reliant on tracker operations (short_direct_normal and 
down_short_diffuse_hemisp) are not recoverable.

• Irradiance, shortwave, direct normal, pyrheliometer, maxima(short_direct_normal_max)
• Irradiance, shortwave, direct normal, pyrheliometer(short_direct_normal)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer(down_short_diffuse_hemisp)
• Irradiance, shortwave, downwelling, diffuse, hemispheric, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• short_direct_normal_std
• down_short_diffuse_hemisp_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

SGP/SIRS/E35 - Upwelling longwave resistor problem

The up_long_hemisp was missing or showing intermittent spikes for the specified period. 
OPS discovered a bad UIR resistor and replaced it with new resistor.