TWP/AERI/C3 - Missing data

Data are missing and unrecoverable.

• timeHHMMSS
• calibrationHBBtemp
• dateYYMMDD
• sceneViewDuration
• calibratedSceneID
• standard_dev_mean_rad
• JulianDay
• calibrationCBBtemp
• Time_UTC_hours
• atmosphericPressure
• alt
• channelNumber
• atmosphericRelativeHumidity
• time
• lon
• BBsupportStructureTemp
• hatchOpen
• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)
• wnum2
• instrumentUnitNumber
• sceneMirPosEncoderMaxDrift
• missingDataFlag
• AERIunitNumber
• Altitude
• wnum
• lat
• base_time
• Longitude
• calibrationAmbientTemp
• sceneMirrorAngle
• outsideAirTemp
• Latitude
• time_offset
• systemReleaseNumber

• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyUniformityCh2)
• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 5.5-18 um(SkyUniformityCh1)
• HBBtempDrift
• time_offset
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• JulianDay
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyBrightnessTempSpectralAveragesCh2)
• wnumsum12
• instrumentUnitNumber
• wnumsum13
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)
• LWskyNENacceptable
• wnumsum14
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 5.5-18 um(SkyBrightnessTempSpectralAveragesCh1)
• wnumsum11
• lon
• wnumsum10
• base_time
• skyViewStdDevRadiance985_990
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• SWskyNENacceptable
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• LWresponsivity
• timeHHMMSS
• sceneMirPosEncoderDrift
• calibratedSceneID
• lat
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• ResponsivitySpectralAveragesCh1
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
• ResponsivitySpectralAveragesCh2
• skyViewStdDevRadiance700_705
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
• SWresponsivity
• channelNumber
• skyViewStdDevRadiance2282_2287
• HBBstable
• dateYYMMDD
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• frontEndFanAirTempDiff
• skyViewStdDevRadiance2510_2515
• AERIunitNumber
• Latitude
• HBB2minNENestimateNo1Ch1
• HBB2minNENestimateNo1Ch2
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• sceneMirrorAngle
• skyViewStdDevRadiance675_680
• skyViewStdDevRadiance2295_2300
• Altitude
• systemReleaseNumber
• HBB2minNENestimateNo2Ch2
• outsideAirTemp
• HBB2minNENestimateNo2Ch1
• calibrationCBBtemp
• ABBmaxTempDiff
• calibrationHBBtemp
• missingDataFlag
• Longitude
• alt
• maxSampleStdDev
• time
• wnumsum9
• wnumsum8
• wnumsum7
• wnumsum6
• wnumsum5
• wnumsum4
• wnumsum3
• wnumsum2
• wnumsum1
• sunSensorIntensity
• calibrationAmbientTemp
• hatchOpen
• SW_HBB_NEN
• dataAvailable
• LW_HBB_NEN
• Time_UTC_hours
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• sceneMirPosEncoderMaxDrift
• atmosphericRelativeHumidity
• SkyNENCh1
• atmosphericPressure
• SkyNENCh2
• rainSensorIntensity
• LWskyNEN
• sceneViewDuration
• SWskyNEN
• HBBmaxTempDiff

• originalInterferogramSize
• sceneMirrorAngle
• systemReleaseNumber
• outsideAirTemp
• LWskyNENlimit
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• dataAvailable
• lat
• Altitude
• ABBtempOffset
• time
• coolerCurrent
• hatchOpen
• motorDriverTemp
• coolerPowerSupplyTemp
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• AERIunitNumber
• ABBbottomTemp
• interferometerEnclosureRelativeHumidity
• interferometerSecondPortTemp
• skyViewImaginaryRadiance2510_2515
• sceneMirrorPosition
• SWresponsivity
• SWskyNENacceptable
• ABBapexTemp
• atmosphericRelativeHumidity
• airNearBBsTemp
• JulianDay
• frontEndFanAirHeatedTemp
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• detectorTemp
• lon
• sunSensorIntensity
• frontEndFanAirTempDiff
• alt
• HBBmaxTempDiff
• ABBviewStdDevRadiance985_990
• ABBviewStdDevRadiance675_680
• skyViewStdDevRadiance700_705
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• LWskyNEN
• skyViewImaginaryRadiance2295_2300
• sceneMirPosCount
• originalLaserWavenumber
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)
• BBsupportStructureTemp
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• ABBviewStdDevRadiance2282_2287
• dateYYMMDD
• outputLaserWavenumber
• LW_HBB_NEN
• sceneMirrorTemp
• sceneMirPosEncoderDrift
• calibrationAmbientTemp
• HBBapexTempWeight
• sceneMirrorMotorStep
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• ABBtopTemp
• coolerExpanderTemp
• skyViewImaginaryRadiance700_705
• Latitude
• numberOfTerms
• base_time
• sceneMirPosEncoderMaxDrift
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• Time_UTC_hours
• missingDataFlag
• sceneViewDuration
• HBBstable
• interferometerWindowTemp
• skyViewImaginaryRadiance2282_2287
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• calibratedSceneID
• ABBapexTempWeight
• opticsCompartmentRelativeHumidity
• expandedInterferogramSize
• maxSampleStdDev
• BBcontroller1temp
• skyViewImaginaryRadiance985_990
• airNearInterferometerTemp
• time_offset
• instrumentUnitNumber
• ABBmaxTempDiff
• LWskyNENacceptable
• HBBapexTemp
• SW_HBB_NEN
• ABBviewStdDevRadiance2295_2300
• HBBtempOffset
• ABBviewStdDevRadiance700_705
• fixed2500ohmResistor
• FFOVhalfAngle
• HBBviewStdDevRadiance675_680
• timeHHMMSS
• skyViewStdDevRadiance2282_2287
• skyViewStdDevRadiance2295_2300
• coolerCompressorTemp
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• frontEndFanAirUnheatedTemp
• skyViewStdDevRadiance2510_2515
• ABBtopTempWeight
• SWskyNENlimit
• ABBviewStdDevRadiance2510_2515
• HBBviewStdDevRadiance2510_2515
• calibrationHBBtemp
• HBBbottomTempWeight
• atmosphericPressure
• calibrationCBBtemp
• LWresponsivity
• HBBviewStdDevRadiance2282_2287
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• skyViewStdDevRadiance675_680
• HBBtopTemp
• skyViewStdDevRadiance985_990
• HBBtopTempWeight
• computerTemp
• skyViewImaginaryRadiance675_680
• channelNumber
• twoMinuteNoiseEstimateFactor
• HBBviewStdDevRadiance985_990
• Longitude
• HBBtempDrift
• fixed12KohmResistor
• HBBviewStdDevRadiance700_705
• sceneMirPosEncoder
• HBBviewStdDevRadiance2295_2300
• rackAmbientTemp
• mirrorMotorTemp
• HBBbottomTemp
• SCEtemp
• ABBbottomTempWeight
• coadditionsCount
• SWskyNEN
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)
• HBBtempDriftLimit
• spareTemp
• rainSensorIntensity
• BBcontroller2temp
• fixed97KohmResistor
• BBcavityFactor

• calibratedSceneID
• outsideAirTemp
• channelNumber
• AERIunitNumber
• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)
• atmosphericPressure
• systemReleaseNumber
• calibrationHBBtemp
• sceneMirPosEncoderMaxDrift
• missingDataFlag
• calibrationCBBtemp
• timeHHMMSS
• Altitude
• dateYYMMDD
• hatchOpen
• instrumentUnitNumber
• alt
• Latitude
• standard_dev_mean_rad
• Longitude
• base_time
• sceneMirrorAngle
• time
• sceneViewDuration
• calibrationAmbientTemp
• Time_UTC_hours
• lon
• lat
• JulianDay
• wnum
• atmosphericRelativeHumidity
• time_offset
• wnum2
• BBsupportStructureTemp

GRW/SKYRAD/M1 - Daily brief instrument shading

Due to the persistent cloudy conditions at this site this shading of the NIP and PSP is 
rarely evident in the data. But from approximately 1745 to 1810 GMT from 8/26 to 10/23 and 
from 3/01 to 4/18 during the AMF deployment years 2009 and 2010, the NIP and PSP are 
shaded by the 10m met tower to the SE of the Skystand. 

Data review indicates that the NIP (short_direct_normal) and PSP (down_short_hemisp) are 
shaded by a single tower pole and possibly other tower mounted objects.  The data are not 
correctable but the azimuth and zenith windows to avoid are:
short_direct_normal (NIP instrument)
	     Zenith angle > 62 deg
  254 deg < Azimuth angle < 262 deg
primary obstruction at 255 deg Az

down_short_diffuse(PSP instrument)
	     Zenith angle > 59 deg
  246 deg < Azimuth angle < 257 deg
primary obstruction at 251.5 deg Az


Date ranges this problem will exist for are:
20090301-20090418 (pre-official deployment, data exist)
20090826-20091023
20100301-20100418
20100826-20101023

The QCrad VAP should flag bad data points via its QC logic.  Users should either exclude 
the data within the windows above or review data for outliers in these zenith, azimuth 
angles.

• inst_direct_normal
• inst_global

• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• down_short_hemisp_std
• short_direct_normal_std
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)

GRW/SKYRAD/M1 - AOS tower Obstruction

Due to the persistent cloudy conditions at this site the shading is rarely evident in the 
data. But at approximately 1010GMT everyday during from approximately 12/2/2009 to 
1/11/2010 the NIP is shaded by the AOS tower.  Data review indicates that only the NIP 
(short_direct_normal) is obstructed when the sun is at 130 to 132 deg azimuth during the time 
period specified.

NIP data are not recoverable.  However, short_direct_normal can be reconstructed by 
applying the following formula:

Short_direct_normal = (down_short_hemisp-down_short_diffuse_hemisp)/cos(Zenith angle)

• inst_direct_normal

• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• short_direct_normal_std

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).

• inst_up_long_hemisp_tp
• inst_up_long_case_resist
• inst_up_long_dome_resist

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

NSA/SKYRAD/C1 - Frosting/Condensation

The down_long_hemisp1 varied up to 40 W/m^2 higher than down_long_hemisp2 during the 
affected time periods. Cold temperatures reported by the IRT suggest the issue is with PIR1.  
Icing or frost on PIR1 or within the ventilator may be to blame but ops reports can't 
substantiate this. Data from PIR1 should be avoided during these suspect time periods.

• down_long_hemisp1_min
• down_long_hemisp1_std
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• down_long_hemisp1_max

• inst_down_long_hemisp1_tp
• inst_down_long_hemisp1_case_resist
• inst_down_long_hemisp1_dome_resist

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)

• inst_global

• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• down_short_hemisp_std

SGP/SIRS/E10 - Reprocess: Incorrect calibration coefficients

Beginning on 3/20/2010 approx 12:45 GMT the datalogger program reverted to its previous 
version. That is, it reverted to the version prior to the latest instrument changeout 
August 18th 2009.  Applied calibration coefficients and serial numbers are incorrect from 
3/20/2010 1245 GMT until correction on 3/24/2010 1645 GMT.  

Longwave instruments are NOT affected. 

The following shortwave datastreams(instrument) are affected:
down_short_hemisp (PSP)
up_short_hemisp (PSP)
short_direct_normal (NIP)
down_short_diffuse(8-48)

Users may apply the following corrections to the data during this time period:
new value = old value * (new cal coeff/old cal coeff)
down_short_diffuse = down_short_diffuse(old) * (114.21/108.53)
up_short_hemisp = up_short_hemisp(old) * (112.93/127.20)
short_direct_normal = short_direct_normal(old) * (116.86/126.60) 
down_short_hemisp = down_short_hemisp(old) * (118.31/127.41)

Data will be reprocessed.

• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• down_short_diffuse_hemisp_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• up_short_hemisp_std
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• down_short_hemisp_std
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)

• inst_up_short_hemisp
• inst_global
• inst_diffuse
• inst_direct_normal

NSA/SKYRAD/C2 - NIP Frost or Ice

Frost or ice likely obstructed the NIP as short_direct_normal values were near zero for 
the affected time periods. These times correspond to mornings before OPS has the 
opportunity to clean the instruments. Clear days at Atqusuk are rare and the NIP instrument can 
very well be ice covered and it won't be apparent in the data.  In this case the clear days 
and overnight icing made the icing issue very apparent.

• inst_direct_normal

• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)

SGP/SIRS/E21 - Tracker failure

First apparent on 03/26, the short_direct_normal values were incorrect after approximately 
1700GMT each day. The tracker was found to have excessive clock drift and was reset by 
site ops on 05/04/2010 and returned to service at 1935GMT. The down_short_diffuse_hemisp 
values appear unaffected by the tracker misalignment.

The short_direct_normal data values are suspect after approximately 1800GMT each day from 
03/26 to 04/26 and after 1700GMT from 04/27 to the end of the period.  The 
short_direct_normal data are not recoverable but can be calculated indirectly using the following 
relationship for each minute of data:
down_short_hemsip = short_direct_normal * cos(zenith angle) + down_short_diffuse

• inst_direct_normal

• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)

GRW/SKYRAD/M1 - Short direct normal questionable

Starting on 05/08/2010 values of short_direct_normal from the NIP instrument were reading 
low (up to 50W/m2).  This was most apparent during sunny/partly sunny periods.  The 
values spontaneously returned to normal on 5/14 with no Ops intervention.  Data system checks 
after that date revealed no apparent problems with instruments or datalogger. The problem 
has not recurred.

Only the short_direct_normal values during this time period are suspect.  If direct normal 
values are needed they can be re-constructed using the following relationship for each 
minute of data:
down_short_hemisp = short_direct_normal * cos(zenith angle) + down_short_diffuse_hemisp

• inst_direct_normal

• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• short_direct_normal_std

SGP/SIRS/E11 - Multiplexer problem

Values of down_short_hemisp, down_long_shaded_hemisp and up_long_hemisp began 
intermittently dropping out beginning 04/29.  This problem gradually became worse, but remained 
intermittent from day to day. 

Site ops reseated the mux connections and replaced the logger wiring panel on 6/1 approx 
1600GMT which corrected the problem.

The automatic quality control flags for the three affected datastreams can be very 
effective at determining the suspect/bad data values for exclusion. Alternatively the affected 
dates and times are given below:
4/29 0302,0345,1312,1405,1905GMT
5/05 0144,1525-1550,1900-2100GMT
5/06 1615,1924GMT
5/10 2000-2359GMT
5/11 1720-1755GMT
5/13 1430-1630GMT
5/14 1700-1900GMT
6/01 1500-1650GMT

• inst_up_long_case_resist
• inst_global
• inst_down_long_shaded_case_resist
• inst_up_long_dome_resist
• inst_down_long_shaded_dome_resist
• inst_up_short_hemisp
• inst_up_long_hemisp_tp
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)

• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
• up_long_hemisp_std
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• 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_down_long_shaded_case_temp
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• inst_up_long_dome_temp
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• down_long_hemisp_shaded_std
• inst_up_long_case_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• inst_down_long_shaded_dome_temp
• down_short_hemisp_std

SGP/SIRS/E6 - Datalogger failure

During this time period all SIRS instruments experienced intermittent data dropouts.  
Starting 6/9/2010 the up_long hemisp and up_short_hemisp instruments dropped out.  On 6/10 
approximately 1800GMT the down_long hemisp instrument and down_short_hemisp instruments 
started dropping out.  In addition, after this time all values from the logger became 
intermittent.  On 06/12/2010 site ops replaced the logger and wiring panel at approx. 1500 GMT. 
 All systems were returned to service approximately 1630GMT.

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

• inst_direct_normal
• inst_up_long_case_resist
• inst_up_long_dome_resist
• inst_down_long_shaded_dome_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
• inst_up_long_hemisp_tp
• inst_up_short_hemisp
• inst_diffuse
• inst_down_long_shaded_case_resist
• inst_global

SGP/SIRS/E11 - Intake Fan Failure

Data were missing from this station from 5/27 to 6/1.  After collections resumed on 6/1, 
the first night (6/2) data revealed down_short_hemisp (PSP) and down_short_diffuse_hemisp 
(8-48) data consistent with ventilator fan failure or obstructed fan filter resulting in 
large thermal offsets.  

On 6/14 Ops cleaned obstructed ventilator fans on both 8-48 and PSP instruments which 
corrected the large thermal offsets.  The PSP was seriously affected and possibly the 8-48 to 
a lesser degree.  

Due to correction on a partly cloudy day the degree of thermal offset cannot be well 
quantified.  Users are advised to avoid the PSP data (down_short_hemisp) completely during 
this time period.  The 8-48 data (down_short_diffuse_hemisp) are suspect.

• inst_diffuse
• inst_global

• down_short_diffuse_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• down_short_hemisp_std
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)

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.

• base_time
• alt
• inst_diffuse
• lat
• inst_up_long_dome_resist
• lon
• inst_up_long_case_resist
• inst_up_long_hemisp_tp
• inst_direct_normal
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
• inst_up_short_hemisp
• inst_global
• time_offset
• inst_down_long_shaded_dome_resist
• inst_down_long_shaded_case_resist

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

SGP/SIRS/C1 - Failed Upwelling SW cable

The upwelling shortwave hemispheric (up_short_hemisp) data were missing or incorrect due 
to a bad cable.  Cable was replaced on 6/30 and the problem was resolved.

• inst_up_short_hemisp

• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
• up_short_hemisp_std
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)

SGP/SIRS/E6 - Incorrect upwelling longwave hemisp

Beginning 6/19 ~1200 GMT, the upwelling longwave hemispheric data (up_long_hemisp) became 
erratic and spiked to extreme values.  Site ops found a broken wire on the multiplexer.  
Repairs were completed on 7/7/2010 ~1700 GMT and the unit returned to service.

• up_long_hemisp_std
• 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, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)

• inst_up_long_hemisp_tp
• inst_up_long_case_resist
• inst_up_short_hemisp
• inst_up_long_dome_resist

NSA/SKYRAD/C2 - Instrument grounding problem

The down_long_hemisp1 was often 50 W/m^2 greater than down_long_hemisp2 during the suspect 
times.  Data logger grounding issues were addressed by site ops and have corrected the 
problem.

• inst_down_long_hemisp1_dome_resist
• inst_down_long_hemisp1_tp
• inst_down_long_hemisp1_case_resist

• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• down_long_hemisp1_min
• down_long_hemisp1_max
• down_long_hemisp1_std

SGP/SIRS/E16 - Questionable downwelling SW hemisp

There was an abnormal difference between downwelling shortwave hemispheric data and 
derived downwelling shortwave hemispheric data 7/16 - 7/24 between ~16:00-20:00 GMT. 

Data review indicates that the derived downwelling shortwave hemispheric 
(down_short_hemisp) data and possibly the shortwave direct normal (short_direct_normal) data were slightly 
lower (up to 50W/m2) than usual at these times. Either the downwelling shortwave 
instrument dome or the short direct normal instrument window may have been dirty during this 
time.  The downwelling shortwave instrument (PSP) is most likely to blame.  After recorded 
precipitation on 7/24 and 7/25 the problem resolved.  Ops visit on 7/26 recorded no 
observable contamination.  The instrument mentors guesses that the precipitation event 
effectively cleaned the instruments.

No recurrence has been observed since 7/24.

• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• down_short_hemisp_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• short_direct_normal_std
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)

• inst_direct_normal
• inst_global

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.

• inst_direct_normal

• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)

SGP/SIRS/E6 - Multiplexer problem

Beginning on 8/13, the MUX had unknown problems that affected the upwelling 
PIR(up_long_hemisp)and downwelling PIR (down_long_hemisp_shaded) and the downwelling 
shortwave(down_short_hemisp). MUX replaced 8/31 at approximately 1600 CST. Problem resolved when MUX 
replaced.

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

• inst_up_long_case_resist
• inst_up_long_dome_resist
• inst_down_long_shaded_dome_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
• inst_up_long_hemisp_tp
• inst_down_long_shaded_case_resist
• inst_global

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.

• inst_up_long_hemisp_tp
• inst_up_long_dome_resist
• inst_up_long_case_resist

• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• up_long_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
• 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 Net Infrared(up_long_netir)

SGP/SIRS/E21 - Reprocessing: TimeCheck Error

The EF data system lost communication with the GPS likely starting on or around June 7th, 
the max time set For E21 was -5.04 sec. Since then, it has been increasing steadily:

Jun 8  Offset:    -267.449039
Jun 9  Offset:    -541.038624
Jun 10 Offset:    -814.469141
Jun 11 Offset:    -1076.862114
Jun 12 Offset:    -1350.330223
Jun 13 Offset:    -1623.639335
Jun 14 Offset:    -1897.047754
Jun 15 Offset:    -2170.552312
Jun 16 Offset:    -2422.130746
Jun 17 Offset:    -2684.607495
Jun 18 - Jun 22 (unknown)
Jun 23 Offset:    -4204.730579

If the E21 system clock drifts the E21 Datalogger clocks will be set to the same incorrect 
time. SIRS irradiance data will be correct but the corresponding time stamp cannot be 
accurately known or simply corrected for.

• inst_diffuse
• inst_up_long_hemisp_tp
• time_offset
• inst_up_short_hemisp
• inst_up_long_case_resist
• lat
• alt
• inst_down_long_shaded_case_resist
• lon
• inst_down_long_shaded_dome_resist
• inst_global
• base_time
• inst_direct_normal
• inst_up_long_dome_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)

• Raw data stream - documentation not supported

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

SGP/SIRS/E16 - NIP failure

After a data outage, all short_direct_normal data were reported as missing. Maintenace 
discovered a failed NIP instrument and replaced it on 9/23 1640GMT.

• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• short_direct_normal_std
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)

• inst_direct_normal

SGP/SIRS/E11 - Reprocess: Incorrect calibration coefficients

Likely near 00:00GMT on 11/18/2010 (Site is missing data from 0000 to 0006 on 11/18) the 
calibration coefficients and serial numbers for the SIRS program at E11 reverted to the 
previous year's(2009/2010) installed shortwave instruments. Site ops re-loaded the correct 
program on 11/24.  Reprocessing will be required for all shortwave instruments.
Incorrect cal coeffs applied during this period:
Diffuse PSP: 113.21 W/(m^2*mV)
PSP-US:      115.00 W/(m^2*mV)
NIP:         115.83 W/(m^2*mV)
PSP-DS:      115.95 W/(m^2*mV)
Correct cal coeffs to apply:
Diffuse PSP: 111.05 W/(m^2*mV)
PSP-US:      115.10 W/(m^2*mV)
NIP:         127.22 W/(m^2*mV)
PSP-DS:      121.20 W/(m^2*mV)

Back out old cal apply new:
Diffuse PSP(down_short_diffuse_hemisp): 111.05/113.21=0.98092
PSP-US(up_short_hemisp):115.10/115.00=1.0010
NIP(short_direct_normal):127.22/115.83=1.09833
PSP-DS(down_short_hemisp): 121.20/115.95=1.0453

• inst_direct_normal
• inst_up_short_hemisp
• inst_global
• inst_diffuse

• up_short_hemisp_std
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• down_short_diffuse_hemisp_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
• down_short_hemisp_std
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)

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.

• inst_down_long_shaded_dome_resist
• inst_up_long_hemisp_tp
• inst_global
• inst_up_long_case_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
• inst_up_long_dome_resist
• inst_down_long_shaded_case_resist

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

TWP/SKYRAD/C2 - Suspect PIR1 data

PIR1 was exhibiting unusual data excursions during the specified time ranges and data are 
suspect.  The problem spontaneously resolved on October 11th without site ops action.  
The problem has not returned.

• down_long_hemisp1_max
• down_long_hemisp1_std
• down_long_hemisp1_min
• inst_down_long_hemisp1_dome_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• inst_down_long_hemisp1_case_temp

• inst_down_long_hemisp1_case_resist
• inst_down_long_hemisp1_dome_resist
• inst_down_long_hemisp1_tp

SGP/SIRS/E16 - Missing data due to cable damage

Starting 11/23 at 00:47 UTC, all upwelling shortwave hemispheric values are missing. 

Additionally, starting 12/9 at 06:01 UTC, all upwelling longwave hemispheric irradiance 
values are missing.

Site ops determined that the tower cable had been chewed through. Repaired the cable on 
12/14/2010 and returned to service at 18:48 GMT.

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

• inst_up_long_dome_resist
• inst_up_short_hemisp
• inst_up_long_hemisp_tp
• inst_up_long_case_resist

NSA/SKYRAD/C2 - Suspect PIR1

PIR1 (down_long_hemisp) data are suspect during these time ranges due to the large 
differences between PIR1 and PIR2 (i.e. greater than 10W/m2).  Maintenance on 12/26 indicated a 
failed ventilator heater connector on PIR1.  After 12/26 PIR1 and PIR2 returned to 
tracking each other within 10W/m2 as typical.

• inst_down_long_hemisp1_dome_resist
• inst_down_long_hemisp1_tp
• inst_down_long_hemisp1_case_resist

• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• inst_down_long_hemisp1_case_temp
• inst_down_long_hemisp1_tp
• inst_down_long_hemisp1_dome_temp
• down_long_hemisp1_min
• down_long_hemisp1_max
• down_long_hemisp1_std

GRW/AERI/M1 - False hatch signal

The hatch closure indicator was not working properly. In the netcdf files, hatchOpen was 
equal to 1 when the hatch was closed and 0 when open, the opposite of what it should have 
been, so data were flagged incorrectly.  Issue was corrected July 22.

• hatchOpen

• hatchOpen

• hatchOpen

• hatchOpen

NSA/AERI/C1 - Missing data

Data are missing and unrecoverable.

• channelNumber
• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)
• time_offset
• AERIunitNumber
• outsideAirTemp
• calibrationHBBtemp
• base_time
• calibratedSceneID
• lat
• alt
• missingDataFlag
• timeHHMMSS
• calibrationCBBtemp
• Longitude
• hatchOpen
• instrumentUnitNumber
• Latitude
• sceneMirrorAngle
• JulianDay
• wnum2
• sceneViewDuration
• BBsupportStructureTemp
• standard_dev_mean_rad
• time
• dateYYMMDD
• atmosphericRelativeHumidity
• calibrationAmbientTemp
• atmosphericPressure
• lon
• sceneMirPosEncoderMaxDrift
• wnum
• Time_UTC_hours
• systemReleaseNumber
• Altitude

• HBB2minNENestimateNo1Ch1
• SWresponsivity
• hatchOpen
• Longitude
• HBBtempDrift
• sunSensorIntensity
• sceneMirPosEncoderMaxDrift
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• HBB2minNENestimateNo1Ch2
• SW_HBB_NEN
• sceneMirrorAngle
• HBBstable
• skyViewStdDevRadiance675_680
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• JulianDay
• missingDataFlag
• ABBmaxTempDiff
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• LWresponsivity
• SWskyNENacceptable
• maxSampleStdDev
• lat
• HBBmaxTempDiff
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• timeHHMMSS
• channelNumber
• Altitude
• calibrationAmbientTemp
• LW_HBB_NEN
• AERIunitNumber
• skyViewStdDevRadiance2295_2300
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• frontEndFanAirTempDiff
• dataAvailable
• instrumentUnitNumber
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)
• HBB2minNENestimateNo2Ch2
• HBB2minNENestimateNo2Ch1
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• LWskyNEN
• time_offset
• Latitude
• skyViewStdDevRadiance2510_2515
• calibrationHBBtemp
• atmosphericPressure
• lon
• calibrationCBBtemp
• LWskyNENacceptable
• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 5.5-18 um(SkyUniformityCh1)
• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyUniformityCh2)
• dateYYMMDD
• alt
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• systemReleaseNumber
• base_time
• skyViewStdDevRadiance985_990
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
• skyViewStdDevRadiance2282_2287
• time
• outsideAirTemp
• calibratedSceneID
• Time_UTC_hours
• atmosphericRelativeHumidity
• rainSensorIntensity
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• sceneViewDuration
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyBrightnessTempSpectralAveragesCh2)
• sceneMirPosEncoderDrift
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 5.5-18 um(SkyBrightnessTempSpectralAveragesCh1)
• ResponsivitySpectralAveragesCh1
• ResponsivitySpectralAveragesCh2
• SWskyNEN
• wnumsum11
• wnumsum12
• wnumsum13
• wnumsum14
• wnumsum10
• skyViewStdDevRadiance700_705
• wnumsum7
• wnumsum6
• wnumsum5
• wnumsum4
• wnumsum3
• wnumsum2
• wnumsum1
• SkyNENCh1
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)
• SkyNENCh2
• wnumsum9
• wnumsum8

• calibrationCBBtemp
• sceneViewDuration
• lon
• wnum2
• Latitude
• lat
• BBsupportStructureTemp
• standard_dev_mean_rad
• Time_UTC_hours
• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)
• Altitude
• atmosphericPressure
• sceneMirPosEncoderMaxDrift
• JulianDay
• calibrationHBBtemp
• wnum
• sceneMirrorAngle
• missingDataFlag
• instrumentUnitNumber
• hatchOpen
• calibratedSceneID
• atmosphericRelativeHumidity
• AERIunitNumber
• outsideAirTemp
• alt
• Longitude
• timeHHMMSS
• dateYYMMDD
• systemReleaseNumber
• time
• channelNumber
• time_offset
• calibrationAmbientTemp
• base_time

• HBBviewStdDevRadiance675_680
• BBcontroller2temp
• instrumentUnitNumber
• skyViewImaginaryRadiance2295_2300
• ABBtempOffset
• HBBmaxTempDiff
• ABBtopTemp
• HBBviewStdDevRadiance2282_2287
• Time_UTC_hours
• skyViewImaginaryRadiance700_705
• fixed2500ohmResistor
• skyViewImaginaryRadiance2510_2515
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)
• ABBapexTemp
• HBBtempDrift
• missingDataFlag
• atmosphericRelativeHumidity
• sunSensorIntensity
• hatchOpen
• time_offset
• fixed97KohmResistor
• LWskyNEN
• detectorTemp
• coadditionsCount
• skyViewImaginaryRadiance2282_2287
• sceneMirrorPosition
• ABBbottomTemp
• ABBviewStdDevRadiance2510_2515
• HBBapexTempWeight
• calibrationHBBtemp
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• atmosphericPressure
• ABBbottomTempWeight
• AERIunitNumber
• expandedInterferogramSize
• HBBtopTemp
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)
• skyViewStdDevRadiance2282_2287
• Altitude
• SWskyNENacceptable
• LWskyNENacceptable
• sceneMirPosCount
• coolerCurrent
• sceneMirrorMotorStep
• SWresponsivity
• time
• lat
• JulianDay
• originalLaserWavenumber
• ABBapexTempWeight
• HBBapexTemp
• skyViewStdDevRadiance985_990
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• ABBviewStdDevRadiance700_705
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• frontEndFanAirUnheatedTemp
• HBBbottomTemp
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• ABBviewStdDevRadiance2295_2300
• computerTemp
• systemReleaseNumber
• lon
• LWresponsivity
• SW_HBB_NEN
• ABBviewStdDevRadiance675_680
• BBsupportStructureTemp
• HBBviewStdDevRadiance2295_2300
• ABBtopTempWeight
• sceneMirPosEncoder
• LWskyNENlimit
• rainSensorIntensity
• skyViewStdDevRadiance2510_2515
• twoMinuteNoiseEstimateFactor
• skyViewImaginaryRadiance985_990
• SCEtemp
• fixed12KohmResistor
• sceneViewDuration
• ABBviewStdDevRadiance2282_2287
• ABBviewStdDevRadiance985_990
• base_time
• timeHHMMSS
• skyViewImaginaryRadiance675_680
• BBcontroller1temp
• SWskyNEN
• calibrationAmbientTemp
• dateYYMMDD
• HBBtopTempWeight
• airNearBBsTemp
• sceneMirrorAngle
• LW_HBB_NEN
• spareTemp
• ABBmaxTempDiff
• HBBtempDriftLimit
• interferometerSecondPortTemp
• HBBstable
• skyViewStdDevRadiance700_705
• Latitude
• sceneMirPosEncoderMaxDrift
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• BBcavityFactor
• coolerCompressorTemp
• airNearInterferometerTemp
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• sceneMirrorTemp
• mirrorMotorTemp
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• coolerExpanderTemp
• channelNumber
• HBBviewStdDevRadiance700_705
• interferometerEnclosureRelativeHumidity
• coolerPowerSupplyTemp
• originalInterferogramSize
• dataAvailable
• FFOVhalfAngle
• HBBviewStdDevRadiance985_990
• skyViewStdDevRadiance675_680
• outsideAirTemp
• HBBviewStdDevRadiance2510_2515
• interferometerWindowTemp
• maxSampleStdDev
• rackAmbientTemp
• sceneMirPosEncoderDrift
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• calibratedSceneID
• skyViewStdDevRadiance2295_2300
• HBBbottomTempWeight
• calibrationCBBtemp
• outputLaserWavenumber
• motorDriverTemp
• opticsCompartmentRelativeHumidity
• frontEndFanAirHeatedTemp
• SWskyNENlimit
• Longitude
• HBBtempOffset
• numberOfTerms
• frontEndFanAirTempDiff
• alt

SGP/AERI/C1 - Missing data

Data are missing and unrecoverable.

• BBsupportStructureTemp
• sceneMirrorAngle
• Longitude
• lon
• channelNumber
• time
• calibratedSceneID
• outsideAirTemp
• systemReleaseNumber
• standard_dev_mean_rad
• lat
• timeHHMMSS
• missingDataFlag
• dateYYMMDD
• calibrationCBBtemp
• base_time
• sceneViewDuration
• time_offset
• instrumentUnitNumber
• atmosphericRelativeHumidity
• wnum
• calibrationAmbientTemp
• alt
• sceneMirPosEncoderMaxDrift
• Altitude
• hatchOpen
• atmosphericPressure
• JulianDay
• AERIunitNumber
• calibrationHBBtemp
• Time_UTC_hours
• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)
• wnum2
• Latitude

• base_time
• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)
• timeHHMMSS
• Longitude
• JulianDay
• channelNumber
• wnum
• atmosphericRelativeHumidity
• hatchOpen
• sceneMirrorAngle
• alt
• instrumentUnitNumber
• systemReleaseNumber
• Latitude
• sceneMirPosEncoderMaxDrift
• Altitude
• calibrationCBBtemp
• standard_dev_mean_rad
• atmosphericPressure
• sceneViewDuration
• outsideAirTemp
• BBsupportStructureTemp
• missingDataFlag
• calibrationAmbientTemp
• AERIunitNumber
• Time_UTC_hours
• lon
• time
• calibratedSceneID
• wnum2
• dateYYMMDD
• calibrationHBBtemp
• lat
• time_offset

• airNearBBsTemp
• interferometerSecondPortTemp
• skyViewImaginaryRadiance985_990
• SWskyNENacceptable
• HBBviewStdDevRadiance700_705
• detectorTemp
• LWskyNENacceptable
• base_time
• ABBbottomTempWeight
• skyViewStdDevRadiance985_990
• calibrationCBBtemp
• Longitude
• HBBmaxTempDiff
• frontEndFanAirTempDiff
• HBBapexTemp
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• rainSensorIntensity
• spareTemp
• LW_HBB_NEN
• SWskyNEN
• skyViewImaginaryRadiance2295_2300
• systemReleaseNumber
• lat
• computerTemp
• sceneMirPosEncoderDrift
• skyViewImaginaryRadiance2510_2515
• fixed97KohmResistor
• timeHHMMSS
• coolerPowerSupplyTemp
• skyViewImaginaryRadiance675_680
• numberOfTerms
• skyViewStdDevRadiance675_680
• sceneMirPosEncoderMaxDrift
• HBBstable
• HBBtempDrift
• HBBtopTemp
• skyViewStdDevRadiance700_705
• mirrorMotorTemp
• sceneMirPosEncoder
• FFOVhalfAngle
• atmosphericPressure
• outsideAirTemp
• sceneMirrorPosition
• SW_HBB_NEN
• HBBbottomTempWeight
• sceneMirPosCount
• BBcontroller2temp
• calibrationAmbientTemp
• originalInterferogramSize
• BBcavityFactor
• ABBviewStdDevRadiance675_680
• ABBtempOffset
• coolerCurrent
• LWskyNENlimit
• ABBviewStdDevRadiance2510_2515
• coolerExpanderTemp
• BBsupportStructureTemp
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• time_offset
• HBBtopTempWeight
• HBBtempOffset
• coolerCompressorTemp
• outputLaserWavenumber
• calibratedSceneID
• ABBmaxTempDiff
• dateYYMMDD
• rackAmbientTemp
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• expandedInterferogramSize
• SCEtemp
• ABBviewStdDevRadiance985_990
• ABBviewStdDevRadiance2295_2300
• sceneMirrorAngle
• ABBtopTemp
• interferometerWindowTemp
• HBBviewStdDevRadiance2282_2287
• time
• atmosphericRelativeHumidity
• Time_UTC_hours
• HBBviewStdDevRadiance985_990
• HBBviewStdDevRadiance675_680
• sceneMirrorTemp
• Altitude
• SWskyNENlimit
• frontEndFanAirHeatedTemp
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)
• fixed2500ohmResistor
• skyViewStdDevRadiance2510_2515
• hatchOpen
• skyViewStdDevRadiance2295_2300
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• JulianDay
• maxSampleStdDev
• ABBtopTempWeight
• skyViewImaginaryRadiance2282_2287
• HBBviewStdDevRadiance2295_2300
• ABBviewStdDevRadiance2282_2287
• opticsCompartmentRelativeHumidity
• sceneMirrorMotorStep
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• alt
• skyViewImaginaryRadiance700_705
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• missingDataFlag
• AERIunitNumber
• originalLaserWavenumber
• ABBviewStdDevRadiance700_705
• coadditionsCount
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• HBBtempDriftLimit
• lon
• sunSensorIntensity
• dataAvailable
• Latitude
• interferometerEnclosureRelativeHumidity
• ABBbottomTemp
• LWskyNEN
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• BBcontroller1temp
• airNearInterferometerTemp
• HBBapexTempWeight
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• SWresponsivity
• LWresponsivity
• HBBbottomTemp
• calibrationHBBtemp
• fixed12KohmResistor
• instrumentUnitNumber
• frontEndFanAirUnheatedTemp
• skyViewStdDevRadiance2282_2287
• HBBviewStdDevRadiance2510_2515
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• motorDriverTemp
• twoMinuteNoiseEstimateFactor
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)
• ABBapexTemp
• ABBapexTempWeight
• channelNumber
• sceneViewDuration

• skyViewStdDevRadiance2282_2287
• Longitude
• maxSampleStdDev
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• alt
• HBBtempDrift
• Latitude
• base_time
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 5.5-18 um(SkyBrightnessTempSpectralAveragesCh1)
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyBrightnessTempSpectralAveragesCh2)
• HBB2minNENestimateNo2Ch2
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)
• skyViewStdDevRadiance2510_2515
• HBB2minNENestimateNo2Ch1
• skyViewStdDevRadiance675_680
• calibrationHBBtemp
• sceneMirPosEncoderDrift
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
• skyViewStdDevRadiance700_705
• SW_HBB_NEN
• AERIunitNumber
• LW_HBB_NEN
• SWresponsivity
• HBB2minNENestimateNo1Ch2
• HBB2minNENestimateNo1Ch1
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• timeHHMMSS
• outsideAirTemp
• sceneMirPosEncoderMaxDrift
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• wnumsum13
• calibratedSceneID
• wnumsum14
• wnumsum11
• wnumsum12
• lon
• wnumsum10
• dataAvailable
• lat
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• ResponsivitySpectralAveragesCh2
• HBBstable
• ResponsivitySpectralAveragesCh1
• hatchOpen
• time
• LWresponsivity
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• ABBmaxTempDiff
• calibrationCBBtemp
• sunSensorIntensity
• missingDataFlag
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• sceneViewDuration
• LWskyNEN
• channelNumber
• LWskyNENacceptable
• instrumentUnitNumber
• SkyNENCh2
• SkyNENCh1
• SWskyNENacceptable
• rainSensorIntensity
• time_offset
• systemReleaseNumber
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• wnumsum9
• wnumsum8
• wnumsum7
• wnumsum6
• wnumsum5
• wnumsum4
• wnumsum3
• wnumsum2
• wnumsum1
• Altitude
• sceneMirrorAngle
• atmosphericPressure
• Time_UTC_hours
• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyUniformityCh2)
• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 5.5-18 um(SkyUniformityCh1)
• JulianDay
• calibrationAmbientTemp
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• atmosphericRelativeHumidity
• HBBmaxTempDiff
• SWskyNEN
• dateYYMMDD
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• skyViewStdDevRadiance985_990
• frontEndFanAirTempDiff
• skyViewStdDevRadiance2295_2300
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)

SGP/SIRS/E16 - Downwelling global SW incorrect

The down_short_hemisp (PSP instrument) values exhibit a large offset due to ventilator fan 
failure and induced instrument heating.  This offset cannot be corrected.  

Users can derive an estimate of global shortwave values with the following formula:
global = direct * cos(zenith angle) + diffuse

• down_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)

• inst_global

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)

• inst_direct_normal

• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

SGP/SIRS/C1 - 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)

• inst_direct_normal

• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• 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)

• inst_direct_normal

• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)

SGP/SIRS/E6 - Bad upwelling long_wave hemisp

The upwelling longwave hemispheric (up_long_hemisp) values were intermittently missing or 
incorrect.  Sensor was replaced on 7/19 and the problem was resolved.

• inst_up_long_case_temp
• up_long_hemisp_std
• 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, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• inst_up_long_dome_temp
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)

• inst_up_long_hemisp_tp
• inst_up_long_case_resist
• inst_up_long_dome_resist

SGP/SIRS/E10 - MUX failure

Starting on 7/18/2010 there were periodic large dropouts in the downwelling shortwave 
hemipsheric data eventually leading to failures in all other SIRS data throughout the 
specified time range.   Subsequent and extensive corrective maintenance was ongoing until 
6/22/2011 when all measurement problems were resolved.  

Due to the extensive data disruption during this time range all data from this station is 
suspect.  

For shortwave datastreams,however, data review reveals that the VAP qcrad1longE10.c1 and 
s1 datastreams have accurately flagged and removed suspect shortwave data and provides the 
user the most accurate values available for short_direct_normal, down_short_diffuse and 
down_short_hemisp. 
The user is referred to the best estimate data in the s1 datastream.

Longwave data after 8/18/2010 1800GMT is known to be biased from 0 to +20 W/m2. The user 
is advised to not use the down_long_hemisp_shaded and up_long_hemisp datastreams in any 
form from 8/18/2010 to 6/22/2011.  The sgpqcradlong1E10 datastreams do not effectively flag 
potentially bad data.

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

• inst_up_long_dome_resist
• inst_down_long_shaded_case_resist
• inst_up_long_hemisp_tp
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
• inst_up_long_case_resist
• inst_diffuse
• inst_up_short_hemisp
• inst_global
• inst_down_long_shaded_dome_resist
• inst_direct_normal

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, Unventilated 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
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• up_long_hemisp_std
• inst_up_long_dome_temp

• inst_up_long_case_resist
• inst_up_long_hemisp_tp
• inst_up_long_dome_resist

NSA/SKYRAD/C1 - Reprocessed: Incorrect calibration coefficients

On 7/20/2011 starting 2229GMT ops replaced the Skyrad shortwave instruments (PSP/8-48/NIP) 
corresponding to the datastreams (down_short_hemisp, down_short_diffuse_hemisp, 
short_direct_normal) but the calibration coefficients weren't changed until 07/25/2011 1842GMT.  

Data were reprocessed and archived in September 2011.

• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• down_short_diffuse_hemisp_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• down_short_hemisp_std
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)

• inst_global
• inst_diffuse
• inst_direct_normal

TWP/SKYRAD/C2 - Tracker failure

Tracker failed on 6/16/2011. Ops replaced with a spare tracker. The affected instruments 
are the 8-48 (down_short_diffuse) and NIP (direct_normal) shortwave instruments.

The down_long_hemisp1 and 2 (PIR1 and PIR2) performance may have been affected by exposure 
to direct sun.

• inst_down_long_hemisp2_case_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• down_long_hemisp1_min
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• inst_down_long_hemisp2_tp
• down_long_hemisp1_max
• inst_down_long_hemisp1_tp
• down_long_hemisp2_std
• down_short_diffuse_hemisp_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• down_long_hemisp1_std
• inst_down_long_hemisp1_dome_temp
• short_direct_normal_std
• down_long_hemisp2_max
• down_long_hemisp2_min
• inst_down_long_hemisp2_dome_temp
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• inst_down_long_hemisp1_case_temp

• inst_diffuse
• inst_down_long_hemisp2_tp
• inst_direct_normal
• inst_down_long_hemisp1_tp
• inst_down_long_hemisp1_case_resist
• inst_down_long_hemisp2_case_resist
• inst_down_long_hemisp2_dome_resist
• inst_down_long_hemisp1_dome_resist

NSA/SKYRAD/C1 - Incorrect data during power outage

During a power outage the downwelling diffuse 8-48 and the downwelling shortwave direct 
were incorrect. The IRT was also affected during this time period.

• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• sky_ir_temp_min
• sky_ir_temp_max
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• down_short_diffuse_hemisp_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• sky_ir_temp_std
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• IR Brightness Temperature(sky_ir_temp)

• inst_diffuse
• inst_sky_ir_signal
• inst_direct_normal

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)
• Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)
• down_long_hemisp_shaded_std
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)

• inst_down_long_shaded_case_resist
• inst_down_long_shaded_dome_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)

TWP/SKYRAD/C2 - IRT power failure

The IRT measurements were incorrect due to a drop in the logger battery voltage.

• IR Brightness Temperature(sky_ir_temp)
• sky_ir_temp_std
• sky_ir_temp_max
• sky_ir_temp_min

• inst_sky_ir_signal

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.

• inst_up_long_case_resist
• inst_up_long_hemisp_tp
• inst_up_long_dome_resist

• up_long_hemisp_std
• 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)
• inst_up_long_case_temp
• inst_up_long_dome_temp
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)

PGH/AERI/M1 - Missing data

Data are missing and unrecoverable.

• spareTemp
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)
• LWskyNEN
• BBcontroller1temp
• sceneMirrorTemp
• LW_HBB_NEN
• sunSensorIntensity
• detectorTemp
• ABBbottomTemp
• motorDriverTemp
• ABBviewStdDevRadiance700_705
• HBBbottomTemp
• ABBviewStdDevRadiance985_990
• HBBtopTempWeight
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• sceneMirPosEncoderDrift
• HBBstable
• BBcavityFactor
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• SWskyNENacceptable
• SWskyNEN
• channelNumber
• skyViewStdDevRadiance2282_2287
• rainSensorIntensity
• Time_UTC_hours
• sceneViewDuration
• skyViewStdDevRadiance2295_2300
• FFOVhalfAngle
• skyViewStdDevRadiance700_705
• JulianDay
• frontEndFanAirUnheatedTemp
• Longitude
• sceneMirrorPosition
• dataAvailable
• HBBmaxTempDiff
• HBBviewStdDevRadiance2295_2300
• mirrorMotorTemp
• sceneMirPosEncoderMaxDrift
• ABBviewStdDevRadiance2295_2300
• calibrationAmbientTemp
• SWskyNENlimit
• skyViewStdDevRadiance2510_2515
• outputLaserWavenumber
• rackAmbientTemp
• dateYYMMDD
• hatchOpen
• HBBtempDriftLimit
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• base_time
• skyViewImaginaryRadiance985_990
• computerTemp
• alt
• ABBapexTemp
• BBcontroller2temp
• ABBviewStdDevRadiance2510_2515
• expandedInterferogramSize
• sceneMirrorMotorStep
• coolerCompressorTemp
• sceneMirPosCount
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• coadditionsCount
• skyViewImaginaryRadiance675_680
• outsideAirTemp
• airNearBBsTemp
• ABBapexTempWeight
• interferometerWindowTemp
• Latitude
• time
• airNearInterferometerTemp
• instrumentUnitNumber
• HBBapexTempWeight
• Altitude
• skyViewStdDevRadiance985_990
• AERIunitNumber
• atmosphericPressure
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• maxSampleStdDev
• HBBviewStdDevRadiance985_990
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• HBBviewStdDevRadiance2282_2287
• HBBviewStdDevRadiance675_680
• calibrationCBBtemp
• interferometerSecondPortTemp
• HBBviewStdDevRadiance700_705
• calibrationHBBtemp
• ABBmaxTempDiff
• originalInterferogramSize
• HBBtopTemp
• coolerPowerSupplyTemp
• HBBbottomTempWeight
• coolerExpanderTemp
• fixed12KohmResistor
• LWskyNENlimit
• lat
• frontEndFanAirTempDiff
• ABBviewStdDevRadiance2282_2287
• BBsupportStructureTemp
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• skyViewStdDevRadiance675_680
• coolerCurrent
• fixed2500ohmResistor
• time_offset
• SWresponsivity
• skyViewImaginaryRadiance700_705
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• fixed97KohmResistor
• atmosphericRelativeHumidity
• missingDataFlag
• opticsCompartmentRelativeHumidity
• SCEtemp
• skyViewImaginaryRadiance2282_2287
• calibratedSceneID
• lon
• skyViewImaginaryRadiance2295_2300
• SW_HBB_NEN
• skyViewImaginaryRadiance2510_2515
• sceneMirPosEncoder
• interferometerEnclosureRelativeHumidity
• systemReleaseNumber
• HBBtempDrift
• LWresponsivity
• timeHHMMSS
• ABBtempOffset
• HBBapexTemp
• sceneMirrorAngle
• originalLaserWavenumber
• ABBbottomTempWeight
• ABBtopTempWeight
• numberOfTerms
• LWskyNENacceptable
• frontEndFanAirHeatedTemp
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• twoMinuteNoiseEstimateFactor
• ABBviewStdDevRadiance675_680
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)
• HBBviewStdDevRadiance2510_2515
• ABBtopTemp
• HBBtempOffset

• calibrationAmbientTemp
• Latitude
• time
• Altitude
• systemReleaseNumber
• calibrationCBBtemp
• lon
• BBsupportStructureTemp
• instrumentUnitNumber
• base_time
• dateYYMMDD
• Longitude
• Time_UTC_hours
• channelNumber
• calibrationHBBtemp
• sceneMirPosEncoderMaxDrift
• missingDataFlag
• hatchOpen
• JulianDay
• sceneMirrorAngle
• time_offset
• outsideAirTemp
• timeHHMMSS
• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)
• AERIunitNumber
• calibratedSceneID
• sceneViewDuration
• wnum2
• standard_dev_mean_rad
• wnum
• alt
• lat
• atmosphericRelativeHumidity
• atmosphericPressure

• timeHHMMSS
• wnum2
• missingDataFlag
• systemReleaseNumber
• channelNumber
• calibrationCBBtemp
• instrumentUnitNumber
• lon
• JulianDay
• BBsupportStructureTemp
• wnum
• atmosphericRelativeHumidity
• calibratedSceneID
• Longitude
• time_offset
• sceneMirPosEncoderMaxDrift
• hatchOpen
• calibrationHBBtemp
• calibrationAmbientTemp
• Time_UTC_hours
• base_time
• sceneMirrorAngle
• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)
• outsideAirTemp
• standard_dev_mean_rad
• Latitude
• lat
• alt
• AERIunitNumber
• sceneViewDuration
• Altitude
• time
• dateYYMMDD
• atmosphericPressure

• maxSampleStdDev
• lat
• LWskyNENacceptable
• wnumsum2
• wnumsum1
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• wnumsum6
• wnumsum5
• wnumsum4
• wnumsum3
• wnumsum9
• wnumsum8
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)
• wnumsum7
• calibratedSceneID
• AERIunitNumber
• outsideAirTemp
• Altitude
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• dateYYMMDD
• ABBmaxTempDiff
• atmosphericRelativeHumidity
• SWskyNENacceptable
• skyViewStdDevRadiance985_990
• calibrationCBBtemp
• SW_HBB_NEN
• SkyNENCh2
• frontEndFanAirTempDiff
• SkyNENCh1
• skyViewStdDevRadiance675_680
• JulianDay
• timeHHMMSS
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
• sceneMirrorAngle
• sceneMirPosEncoderDrift
• LW_HBB_NEN
• LWresponsivity
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• hatchOpen
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 5.5-18 um(SkyBrightnessTempSpectralAveragesCh1)
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyBrightnessTempSpectralAveragesCh2)
• missingDataFlag
• HBBtempDrift
• SWresponsivity
• HBB2minNENestimateNo2Ch2
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• HBB2minNENestimateNo2Ch1
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• wnumsum10
• wnumsum11
• dataAvailable
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• wnumsum13
• wnumsum12
• alt
• wnumsum14
• channelNumber
• skyViewStdDevRadiance2295_2300
• skyViewStdDevRadiance2282_2287
• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyUniformityCh2)
• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 5.5-18 um(SkyUniformityCh1)
• calibrationAmbientTemp
• HBBmaxTempDiff
• instrumentUnitNumber
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• time_offset
• Latitude
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• Longitude
• sceneMirPosEncoderMaxDrift
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• skyViewStdDevRadiance2510_2515
• LWskyNEN
• sceneViewDuration
• atmosphericPressure
• sunSensorIntensity
• calibrationHBBtemp
• rainSensorIntensity
• base_time
• ResponsivitySpectralAveragesCh2
• time
• ResponsivitySpectralAveragesCh1
• HBB2minNENestimateNo1Ch2
• HBB2minNENestimateNo1Ch1
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)
• HBBstable
• lon
• skyViewStdDevRadiance700_705
• Time_UTC_hours
• systemReleaseNumber
• SWskyNEN

NSA/AERI/C1 - Partial data collection

A corrupt file was found to be crashing the AERI software after approximately 30 minutes 
of data were collected each day during this time period.

With the minimal data collected each day it is advised that data users choose dates 
outside of this time range for research requiring AERI data.

• channelNumber
• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)
• time_offset
• AERIunitNumber
• outsideAirTemp
• calibrationHBBtemp
• base_time
• calibratedSceneID
• lat
• alt
• missingDataFlag
• timeHHMMSS
• calibrationCBBtemp
• Longitude
• hatchOpen
• instrumentUnitNumber
• Latitude
• sceneMirrorAngle
• JulianDay
• wnum2
• sceneViewDuration
• BBsupportStructureTemp
• standard_dev_mean_rad
• time
• dateYYMMDD
• atmosphericRelativeHumidity
• calibrationAmbientTemp
• atmosphericPressure
• lon
• sceneMirPosEncoderMaxDrift
• wnum
• Time_UTC_hours
• systemReleaseNumber
• Altitude

• HBB2minNENestimateNo1Ch1
• SWresponsivity
• hatchOpen
• Longitude
• HBBtempDrift
• sunSensorIntensity
• sceneMirPosEncoderMaxDrift
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• HBB2minNENestimateNo1Ch2
• SW_HBB_NEN
• sceneMirrorAngle
• HBBstable
• skyViewStdDevRadiance675_680
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• JulianDay
• missingDataFlag
• ABBmaxTempDiff
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• LWresponsivity
• SWskyNENacceptable
• maxSampleStdDev
• lat
• HBBmaxTempDiff
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• timeHHMMSS
• channelNumber
• Altitude
• calibrationAmbientTemp
• LW_HBB_NEN
• AERIunitNumber
• skyViewStdDevRadiance2295_2300
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• frontEndFanAirTempDiff
• dataAvailable
• instrumentUnitNumber
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)
• HBB2minNENestimateNo2Ch2
• HBB2minNENestimateNo2Ch1
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• LWskyNEN
• time_offset
• Latitude
• skyViewStdDevRadiance2510_2515
• calibrationHBBtemp
• atmosphericPressure
• lon
• calibrationCBBtemp
• LWskyNENacceptable
• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 5.5-18 um(SkyUniformityCh1)
• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyUniformityCh2)
• dateYYMMDD
• alt
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• systemReleaseNumber
• base_time
• skyViewStdDevRadiance985_990
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
• skyViewStdDevRadiance2282_2287
• outsideAirTemp
• time
• calibratedSceneID
• Time_UTC_hours
• atmosphericRelativeHumidity
• rainSensorIntensity
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• sceneViewDuration
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyBrightnessTempSpectralAveragesCh2)
• sceneMirPosEncoderDrift
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 5.5-18 um(SkyBrightnessTempSpectralAveragesCh1)
• ResponsivitySpectralAveragesCh1
• ResponsivitySpectralAveragesCh2
• SWskyNEN
• wnumsum11
• wnumsum12
• wnumsum13
• wnumsum14
• wnumsum10
• skyViewStdDevRadiance700_705
• wnumsum7
• wnumsum6
• wnumsum5
• wnumsum4
• wnumsum3
• wnumsum2
• wnumsum1
• SkyNENCh1
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)
• SkyNENCh2
• wnumsum9
• wnumsum8

• calibrationCBBtemp
• sceneViewDuration
• lon
• wnum2
• Latitude
• lat
• BBsupportStructureTemp
• standard_dev_mean_rad
• Time_UTC_hours
• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)
• Altitude
• atmosphericPressure
• sceneMirPosEncoderMaxDrift
• JulianDay
• calibrationHBBtemp
• wnum
• sceneMirrorAngle
• missingDataFlag
• instrumentUnitNumber
• hatchOpen
• calibratedSceneID
• atmosphericRelativeHumidity
• AERIunitNumber
• outsideAirTemp
• alt
• Longitude
• timeHHMMSS
• dateYYMMDD
• systemReleaseNumber
• time
• channelNumber
• time_offset
• calibrationAmbientTemp
• base_time

• HBBviewStdDevRadiance675_680
• BBcontroller2temp
• instrumentUnitNumber
• skyViewImaginaryRadiance2295_2300
• ABBtempOffset
• HBBmaxTempDiff
• ABBtopTemp
• HBBviewStdDevRadiance2282_2287
• skyViewImaginaryRadiance700_705
• Time_UTC_hours
• fixed2500ohmResistor
• skyViewImaginaryRadiance2510_2515
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)
• ABBapexTemp
• HBBtempDrift
• missingDataFlag
• sunSensorIntensity
• atmosphericRelativeHumidity
• hatchOpen
• time_offset
• fixed97KohmResistor
• LWskyNEN
• detectorTemp
• coadditionsCount
• skyViewImaginaryRadiance2282_2287
• sceneMirrorPosition
• ABBbottomTemp
• ABBviewStdDevRadiance2510_2515
• HBBapexTempWeight
• calibrationHBBtemp
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• atmosphericPressure
• ABBbottomTempWeight
• AERIunitNumber
• expandedInterferogramSize
• HBBtopTemp
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)
• skyViewStdDevRadiance2282_2287
• Altitude
• SWskyNENacceptable
• LWskyNENacceptable
• sceneMirPosCount
• sceneMirrorMotorStep
• coolerCurrent
• SWresponsivity
• time
• lat
• JulianDay
• originalLaserWavenumber
• ABBapexTempWeight
• skyViewStdDevRadiance985_990
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• HBBapexTemp
• ABBviewStdDevRadiance700_705
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• frontEndFanAirUnheatedTemp
• HBBbottomTemp
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• ABBviewStdDevRadiance2295_2300
• computerTemp
• systemReleaseNumber
• lon
• LWresponsivity
• SW_HBB_NEN
• ABBviewStdDevRadiance675_680
• BBsupportStructureTemp
• HBBviewStdDevRadiance2295_2300
• ABBtopTempWeight
• sceneMirPosEncoder
• LWskyNENlimit
• rainSensorIntensity
• twoMinuteNoiseEstimateFactor
• skyViewStdDevRadiance2510_2515
• skyViewImaginaryRadiance985_990
• SCEtemp
• fixed12KohmResistor
• sceneViewDuration
• ABBviewStdDevRadiance2282_2287
• ABBviewStdDevRadiance985_990
• base_time
• timeHHMMSS
• skyViewImaginaryRadiance675_680
• BBcontroller1temp
• SWskyNEN
• calibrationAmbientTemp
• HBBtopTempWeight
• dateYYMMDD
• sceneMirrorAngle
• airNearBBsTemp
• LW_HBB_NEN
• spareTemp
• ABBmaxTempDiff
• HBBtempDriftLimit
• interferometerSecondPortTemp
• HBBstable
• skyViewStdDevRadiance700_705
• Latitude
• sceneMirPosEncoderMaxDrift
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• BBcavityFactor
• airNearInterferometerTemp
• coolerCompressorTemp
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• sceneMirrorTemp
• mirrorMotorTemp
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• coolerExpanderTemp
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• channelNumber
• HBBviewStdDevRadiance700_705
• interferometerEnclosureRelativeHumidity
• coolerPowerSupplyTemp
• originalInterferogramSize
• dataAvailable
• FFOVhalfAngle
• HBBviewStdDevRadiance985_990
• skyViewStdDevRadiance675_680
• outsideAirTemp
• HBBviewStdDevRadiance2510_2515
• interferometerWindowTemp
• maxSampleStdDev
• rackAmbientTemp
• sceneMirPosEncoderDrift
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• calibratedSceneID
• skyViewStdDevRadiance2295_2300
• HBBbottomTempWeight
• calibrationCBBtemp
• outputLaserWavenumber
• motorDriverTemp
• opticsCompartmentRelativeHumidity
• frontEndFanAirHeatedTemp
• SWskyNENlimit
• Longitude
• HBBtempOffset
• numberOfTerms
• frontEndFanAirTempDiff
• alt

SGP/SIRS/C1 - NIP Failure

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


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)

• inst_direct_normal

• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

GAN/SKYRAD/M1 - PIR2 failure

Increasing difference between PIR1 and PIR2 beginning December 12.  Suspected problem with 
PIR2 thermistor bridge or instrument thermistor.  OPS replaced PIR2 unit with a spare. 
The data from PIR2 after replacement appears to be normal.

• down_long_hemisp2_max
• down_long_hemisp2_min
• inst_down_long_hemisp2_case_temp
• down_long_hemisp2_std
• inst_down_long_hemisp2_tp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2)
• inst_down_long_hemisp2_dome_temp

• inst_down_long_hemisp2_case_resist
• inst_down_long_hemisp2_tp
• inst_down_long_hemisp2_dome_resist

SBS/SKYRAD/M1 - Noise in downwelling SW hemispheric

Downwelling Shortwave Hemispheric signal varies wildly between missing (-9999) and large 
positive values over this period.

• inst_global

• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)

SGP/SIRS/C1 - Reprocess: Incorrect downwelling longwave calibration coefficient

Calibration coefficient for downwelling longwave was incorrect for the specified period.

To correct the one minute data b1 datastream follow the procedure below:
1) Obtain the following variables from the 20s datastream for each one minute of the 
affected time range:
  inst_down_long_shaded_dome_resist (Rd)
  inst_down_long_shaded_case_resist (Rc)
  inst_down_long_hemisp_shaded_tp (tpDIR_mV)
                                         
2) using the 20s tp voltage in mV convert to uV.
  tpDIR[uV] = inst_down_long_hemisp_shaded_tp[mV]*1000[uV/mV]

3) For each 20s data entry convert Rd and Rc to temperature
  Td =1/ (a0 + (a1*LN (Rd*1000) + (a2*LN (Rd*1000)^3)))
  Tc = 1/ (a0 + (a1*LN (Rc*1000) + (a2*LN (Rc*1000)^3)))
  where a0 = 0.0010295 
        a1 = 0.0002391
        a2 = 0.0000001568

4) Apply for each 20s data entry: (correct k1=0.2762)
  WinDIR(W/m2)= [0.2762*tpDIR] + Sigma*Tc^4 -4*Sigma*(Td^4 - Tc^4)
  where, Sigma = 5.6704E-8 (Stefan-Boltzman Const)
                                      
5) Generate new 1 minute average from the 3 20-second measurements

• inst_down_long_shaded_dome_resist
• inst_down_long_shaded_case_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)

• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• down_long_hemisp_shaded_std
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• inst_down_long_shaded_case_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)
• inst_down_long_shaded_dome_temp

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.

• inst_direct_normal
• inst_diffuse

• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• short_direct_normal_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• down_short_diffuse_hemisp_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

GAN/SKYRAD/M1 - PIR1 failure

PIR1 irradiance data are incorrect beginning Feb 4th and questionable as far back as Jan 
31st around 0400 UTC.  Site operations ceased Feb 9 before repairs were made.

• inst_down_long_hemisp1_tp
• inst_down_long_hemisp1_case_temp
• down_long_hemisp1_std
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• inst_down_long_hemisp1_dome_temp
• down_long_hemisp1_min
• down_long_hemisp1_max

• inst_down_long_hemisp1_tp
• inst_down_long_hemisp1_case_resist
• inst_down_long_hemisp1_dome_resist

SGP/SIRS/C1 - Reprocess: Incorrect downwelling longwave calibration coefficient

The calibration coeff and serial number for the down_long_hemisp_shaded was incorrect 
during the period specified. 

Correct Instrument serial number = 30010F3 
                              K1 = 0.3125
Incorrect Instrument serial number = 30690F3 
                                K1 = 0.2762
 
Data will be reprocessed.

To correct the one minute data b1 datastream follow the procedure below:
1) Obtain the following variables from the 20s datastream for each one minute of the 
affected
time range:
  inst_down_long_shaded_dome_resist (Rd)
  inst_down_long_shaded_case_resist (Rc)
  inst_down_long_hemisp_shaded_tp (tpDIR_mV)
					 
2) using the 20s tp voltage in mV convert to uV.
  tpDIR[uV] = inst_down_long_hemisp_shaded_tp[mV]*1000[uV/mV]

3) For each 20s data entry convert Rd and Rc to temperature
  Td =1/ (a0 + (a1*LN (Rd*1000) + (a2*LN (Rd*1000)^3)))
  Tc = 1/ (a0 + (a1*LN (Rc*1000) + (a2*LN (Rc*1000)^3)))
  where a0 = 0.0010295 
	a1 = 0.0002391
	a2 = 0.0000001568

4) Apply for each 20s data entry: (correct k1=0.3125)
  WinDIR(W/m^2)= [0.3125*tpDIR] + Sigma*Tc^4 -4*Sigma*(Td^4 - Tc^4)
  where, 
        WinDIR = Corrected down_long_hemisp_shaded (W/m^2)
        Sigma =	5.6704E-8 (Stefan-Boltzman Constant)

				      
5) Generate new 1 minute average from the three 20-second measurements

• inst_down_long_shaded_dome_resist
• inst_down_long_shaded_case_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)

• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• down_long_hemisp_shaded_std
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• inst_down_long_shaded_case_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)
• inst_down_long_shaded_dome_temp

TWP/SKYRAD/C1 - IRT failure

The IRT failed and was replaced.

• inst_sky_ir_signal

• sky_ir_temp_max
• sky_ir_temp_std
• sky_ir_temp_min
• IR Brightness Temperature(sky_ir_temp)

SGP/SIRS/E21 - NIP data intermittently missing or incorrect

The short_direct_normal data was showing negative values (<-50 W/m^2)(during first time 
range) and missing value (-9999)(during second time range) each day a little after sunrise. 
Primarily between the hours of 11:00 - 14:00 GMT. Site Ops repaired a broken wire in the 
NIP cable and data appeared OK after the repair.

NIP data are not recoverable. Users can calculate short_direct normal component using:
short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle)

• inst_direct_normal

• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)

SGP/SIRS/E37 - Instrument problem

The short_direct_normal value is having some issues.  Data is missing starting 0123 GMT on 
6/30 through current.  Data is either close to 0 on clear days or not following normal 
trends prior to the aforementioned period.  down_short_diffuse_hemisp is also suffering 
from some issues.  

Problem looks to have started on 6/17, but may have started earlier than that.

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

• inst_diffuse
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
• lon
• time_offset
• inst_up_long_dome_resist
• inst_down_long_shaded_case_resist
• inst_down_long_shaded_dome_resist
• inst_up_long_case_resist
• inst_global
• inst_direct_normal
• alt
• base_time
• lat
• inst_up_short_hemisp
• inst_up_long_hemisp_tp

SGP/SIRS/E37 - Tracker and NIP repairs

The solar tracker at this site was replaced; communication problems with the replacement 
tracker were performed 7/2/12; NIP repair performed 7/9/12. Data for direct normal (NIP) 
and diffuse (8-48) are incorrect and nonrecoverable during affected period. Longwave data 
are generally unaffected by such tracker failures.

• down_short_diffuse_hemisp_std
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)

• inst_diffuse
• inst_direct_normal

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.

• inst_up_long_hemisp_tp
• inst_up_long_dome_resist
• inst_up_long_case_resist

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

SGP/SIRS/E38 - Upwelling LW cable failure

The up_long_hemisp shows large steps and offsets in values (greater than physically 
possible incoming radiation) that were eventually attributed to a bad instrument cable 
connection.

The up_long_hemisp values during the time range specified were intermittant, varying from 
10 to 100% of any given day.

• inst_up_long_hemisp_tp
• inst_up_long_case_resist
• inst_up_long_dome_resist

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

SGP/SIRS/E31 - Upwelling LW noisy

The up_long_hemisp and up_long_netir are missing, noisy, or suspect during this time 
period.

• inst_up_long_case_resist
• inst_up_long_hemisp_tp
• inst_up_long_dome_resist

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

SGP/SIRS/E31 - Tracker failure

All tracker related datastreams are affected: short_direct_normal (NIP), 
down_short_diffuse_hemispheric (8-48), and possibly the down_long_hemisp_shaded (PIR) although it is not 
apparent in the reviewed data for the affected timeframe.

• inst_down_long_shaded_case_resist
• inst_diffuse
• inst_direct_normal
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
• inst_down_long_shaded_dome_resist

• down_long_hemisp_shaded_std
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• inst_down_long_shaded_dome_temp
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• down_short_diffuse_hemisp_std
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• inst_down_long_shaded_case_temp
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• short_direct_normal_std
• Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)

TWP/SKYRAD/C2 - Downwelling LW #1 questionable

Hemispheric downwelling measurements on the hemisp1 were suspect due to the large 
differences between PIR1 and PIR2 (i.e. greater than 10W/m2). Maintenance on 3/14/2012 indicated 
problem with the connector and ops re-seated the connector on PIR 1. After the 
maintenance, PIR1 and PIR2 returned to tracking each other within 10W/m2 as typical.

• down_long_hemisp1_max
• inst_down_long_hemisp1_tp
• down_long_hemisp1_std
• down_long_hemisp1_min
• inst_down_long_hemisp1_dome_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• inst_down_long_hemisp1_case_temp

• inst_down_long_hemisp1_case_resist
• inst_down_long_hemisp1_dome_resist
• inst_down_long_hemisp1_tp

PVC/SKYRAD/M1 - Intake Fan Failure

PSP (down_short_hemisp) ventilator fan failed from start of PVC deployment.  Site ops 
repaired/replaced on 8/28. Instrument data are not recoverable.

The down_short_hemisp data are not recoverable but can be re-constructed using the 
short_direct_normal and down_short_diffuse_hemispheric measurements and the following formula: 

Global = Direct * cos(zenith angle) + Diffuse

• inst_global

• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std

SGP/SIRS/E13 - Instrument problem

up_long_hemisp measurements are intermittant and remain so after extensive 
troubleshooting.  This problem will likly remain open ended until site ops can replace the cable which 
serves the up_long_hemisp instrument (i.e. the Eppley PIR).

• inst_up_long_dome_resist
• inst_up_long_case_resist
• inst_up_long_hemisp_tp

• Raw data stream - documentation not supported

• Raw data stream - documentation not supported

• up_long_hemisp_std
• 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 Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)

• up_long_case_resist
• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
• up_long_dome_resist
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)

• up_long_hemisp_std
• 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, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
• inst_up_long_case_temp
• inst_up_long_dome_temp

• 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
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)

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

SGP/SIRS/E13 - Reprocessed: Incorrect UIR calibration

For the time range specified the UIR had incorrect calibration coefficients applied.  The 
k1 coefficient applied was 0.25042 when it should have been 0.2558.  This resulted in the 
instrument under reporting up_long_hemsip by approximately 2.1%. 

Reprocessing completed 20121119

• inst_up_long_case_resist
• inst_up_long_hemisp_tp
• inst_up_long_dome_resist
• inst_up_short_hemisp

• up_long_hemisp_std
• 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)
• inst_up_long_case_temp
• inst_up_long_dome_temp
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)

SGP/SIRS/E33 - Instrument noise problem

The UIR instrument (up_long_hemisp) had significant noise starting from the commission 
date.  On 8/14/2012 15:59 the UIR was replaced which corrected the noise problem.

• inst_up_short_hemisp
• inst_up_long_case_resist
• inst_up_long_hemisp_tp
• inst_up_long_dome_resist

• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• inst_up_long_case_temp
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
• inst_up_long_dome_temp
• up_long_hemisp_std
• 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)

PVC/SKYRAD/M1 - Reprocessed: Incorrect calibration coefficients

Incorrect programs were used in Skyrad since PVC deployment period began.  The Skyrad 
program was corrected 09/05/2012 approx 20:00GMT. Reprocessing will be required of all 
instruments at this station except the IRT. This will require applying the following 
corrections for the time range specified. 
Serial numbers(incorrectly applied): 
PIR1-DIR: 34306
PIR2-DIR: 34303
Diffuse PSP: 34284
NIP: 34097
PSP-DS: 34293

Serial numbers(correct): 
PIR1-DIR: 34303
PIR2-DIR: 34306
Diffuse PSP: 35751
NIP: 37285
PSP-DS: 37302
    
Data: 
Longwave requires reprocessing using the 20second datastream and applying the following k1 
coefficients (note: the longwave instruments were swapped according to datalogger).
down_long_hemisp1 (old cal) = 0.23041
down_long_hemisp1 (corr cal) = 0.24750
down_long_hemisp2 (old cal) = 0.24750
down_long_hemisp2 (corr cal) = 0.23041

Shortwave only requires application of the following corrections to 1min and 20 second 
data.
down_short_diffuse_hemisp(corr) = down_short_diffuse_hemisp(old value)*(104.45(corr 
cal)/120.91(incorr cal))
short_direct_normal(corr) = short_direct_normal(old value)*(117.25(new cal)/124.97(incorr 
cal))
up_short_hemip(corr) = up_short_hemip(old value)*(119.21(new cal)/108.48(incorr cal))

Contact radiometer mentor with any comments/questions

Reprocessing completed 20121217

• inst_down_long_hemisp1_case_resist
• inst_global
• inst_diffuse
• inst_direct_normal
• inst_down_long_hemisp2_case_resist
• inst_down_long_hemisp2_dome_resist
• inst_down_long_hemisp1_dome_resist
• inst_down_long_hemisp1_tp
• inst_down_long_hemisp2_tp

• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• down_long_hemisp2_std
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• inst_down_long_hemisp2_case_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• inst_down_long_hemisp2_tp
• down_long_hemisp1_max
• down_long_hemisp2_min
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• down_long_hemisp1_std
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• down_short_diffuse_hemisp_std
• short_direct_normal_std
• down_long_hemisp2_max
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• down_short_hemisp_std
• inst_down_long_hemisp2_dome_temp
• inst_down_long_hemisp1_case_temp
• inst_down_long_hemisp1_dome_temp
• down_long_hemisp1_min
• inst_down_long_hemisp1_tp

SGP/SIRS/E33 - Instrument noise problem

During troubleshooting of the UIR (up_long_hemisp) the UIR and DIR (down_long_hemsip) 
pyrgeometers were swapped to help isolate an instrument noise issue.  After this swap it was 
determined that the noise was associated with this specific instrument.

For the time range specified 8/14 to 8/17 the DIR data are not recoverable since the 
instrument was faulty (it was the old bad UIR). The instrument was replaced with spare on 8/17.

• inst_down_long_shaded_dome_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
• inst_down_long_shaded_case_resist

• down_long_hemisp_shaded_std
• inst_down_long_shaded_dome_temp
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• inst_down_long_shaded_case_temp
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)

SGP/SIRS/E32 - Reprocess: Partial shading

Shading of the PSP radiometer occurred after sunrise each day of the reported date period, 
during the time period between 1215 and 1300 UTC.  Issue is present in the downwelling 
shortwave hemispheric variable.  The shading was caused by the the presence of an antenna 
that was later relocated. Data to be reprocessed and designated as missing (-9999) for 
the affected time period each day (except where NIP is greater than 150 w/m^2).

• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• down_short_hemisp_std

• inst_global

SGP/SIRS/E12 - Shadowband misalignment

The E12 tracker had failed from 7/20 to 8/2. The tracker was replaced and returned to 
service on 8/2.  However, the tracker was not aligned correctly until 10/18.  

Data for short_direct_normal (NIP instrument) and down_short_diffuse (8-48 instrument) are 
bad and not recoverable during this entire time range.

• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Shortwave Direct Normal Irradiance, 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
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)

• inst_diffuse
• inst_direct_normal

PVC/SKYRAD/M1 - IRT failure

The IRT failed because of water intrusion.

• inst_sky_ir_signal

• sky_ir_temp_std
• sky_ir_temp_min
• IR Brightness Temperature(sky_ir_temp)
• sky_ir_temp_max

PVC/SKYRAD/M1 - IRT scale factor

The IRT was replaced with a unit with the wrong analog output configuration, such that the 
sky temperature was below the measurable range, resulting in a constant output of 0 
volts or 173.2 K.

• inst_sky_ir_signal

• sky_ir_temp_std
• sky_ir_temp_min
• IR Brightness Temperature(sky_ir_temp)
• sky_ir_temp_max

TWP/AERI/C1 - Obstructed scene mirror mechanism (mouse)

A physical obstruction caused the scene mirror to not point at the hot blackbody HBB 
correctly.  This lead to inaccurate sky views for the scan sequences calibrated with the 
incorrect HBB views.  The problem was intermittent, it often got worse as the UTC day 
progressed, then reset at 0Z

Contaminated HBB scenes can potentially be identified by looking at the responsivity: a 
sudden drop in responsivity is usually indicative of incorrect HBB views.  HBB radiance and 
mirror position could also be used from the raw data.

• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)

• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)

• skyViewImaginaryRadiance985_990
• HBBviewStdDevRadiance2510_2515
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• skyViewImaginaryRadiance675_680
• HBBviewStdDevRadiance2282_2287
• HBBviewStdDevRadiance675_680
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• SWresponsivity
• skyViewStdDevRadiance2295_2300
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• skyViewImaginaryRadiance2295_2300
• skyViewImaginaryRadiance2510_2515
• skyViewImaginaryRadiance700_705
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• HBBviewStdDevRadiance700_705
• SWskyNENlimit
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)
• HBBviewStdDevRadiance985_990
• skyViewStdDevRadiance2282_2287
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• LW_HBB_NEN
• skyViewStdDevRadiance985_990
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)
• skyViewStdDevRadiance2510_2515
• SW_HBB_NEN
• SWskyNENacceptable
• HBBviewStdDevRadiance2295_2300
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• SWskyNEN
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• skyViewImaginaryRadiance2282_2287
• LWresponsivity
• skyViewStdDevRadiance700_705
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• skyViewStdDevRadiance675_680
• LWskyNEN

• SWskyNENacceptable
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
• SW_HBB_NEN
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyBrightnessTempSpectralAveragesCh2)
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 5.5-18 um(SkyBrightnessTempSpectralAveragesCh1)
• skyViewStdDevRadiance700_705
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)
• skyViewStdDevRadiance985_990
• ResponsivitySpectralAveragesCh2
• ResponsivitySpectralAveragesCh1
• SkyNENCh2
• skyViewStdDevRadiance2282_2287
• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyUniformityCh2)
• LWresponsivity
• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 5.5-18 um(SkyUniformityCh1)
• SkyNENCh1
• LW_HBB_NEN
• LWskyNENacceptable
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• skyViewStdDevRadiance675_680
• HBB2minNENestimateNo1Ch1
• HBB2minNENestimateNo1Ch2
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• SWskyNEN
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• HBB2minNENestimateNo2Ch2
• HBB2minNENestimateNo2Ch1
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• skyViewStdDevRadiance2510_2515
• SWresponsivity
• LWskyNEN
• skyViewStdDevRadiance2295_2300

SGP/SIRS/E33 - Reprocessed: Incorrect UIR calibration

During troubleshooting of the UIR (up_long_hemisp) the UIR and DIR (down_long_hemsip) 
pyrgeometers were swapped to help isolate an instrument noise issue.  

The replacement UIR instrument installed on 8/14 had incorrect calibration coefficients 
applied.  The serial number was correct.

wrong UIR k1 cal = 0.2376
correct UIR k1 cal = 0.2451

Reprocessing completed 20121217.

• inst_up_short_hemisp
• inst_up_long_case_resist
• inst_up_long_hemisp_tp
• inst_up_long_dome_resist

• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
• up_long_hemisp_std
• 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)

SGP/SIRS/E33 - Reprocessed: Incorrect DIR calibration

During troubleshooting of the UIR (up_long_hemisp) the UIR and DIR (down_long_hemsip) 
pyrgeometers were swapped to help isolate an instrument noise issue.  That swap resulted in 
bad DIR data from 8/14-8/17 (documented in D121010.1)

A replacement DIR instrument installed on 8/17 had incorrect calibration coefficients 
applied.  The serial number was correct.

wrong DIR k1 cal = 0.2967
correct DIR k1 cal =  0.3086

Reprocessing completed 20121217.

• inst_down_long_shaded_dome_resist
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
• inst_down_long_shaded_case_resist

• down_long_hemisp_shaded_std
• inst_down_long_shaded_dome_temp
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• inst_down_long_shaded_case_temp
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)

PGH/SKYRAD/M1 - Reprocess: Incorrect calibrations

During the entire India deployment the Skyrad system was configured with incorrect 
calibration coefficients for the shortwave instruments. The program hadn't been updated since 
the previous deployment in the Azores.

The instrument mentor, site personal and OSS support have attempted to best determine the 
serial numbers of instruments installed at PGH during the deployment period.  The 
following instrument data will need to be reprocessed with the following correction multipliers:

PIR1-DIR(down_long_hemisp1): OK, no correction required
PIR2-DIR(down_long_hemisp2): OK, no correction required
Diffuse 8-48 (down_short_diffuse): 116.95(correct)/120.91(incorrect) = .96725
NIP (short_direct_normal): 127.03(correct)/124.97(incorrect) = 1.01648
PSP-DS (down_short_hemsip): 111.29(correct)/108.48(incorrect) = 1.02590
IRT: calibration should be validated by instrument mentor (Vic Morris): mult=26, 
offset=173.2

Correct serial numbers:   
Diffuse 8-48 (down_short_diffuse): 34066
NIP (short_direct_normal): 34135E6
PSP-DS (down_short_hemsip): 33942F3

• inst_global
• inst_diffuse
• inst_sky_ir_signal
• inst_direct_normal

• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• down_short_hemisp_std
• IR Brightness Temperature(sky_ir_temp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• sky_ir_temp_min
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• sky_ir_temp_max
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• sky_ir_temp_std
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• down_short_diffuse_hemisp_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std

SGP/SIRS/E33 - Reprocessed: Incorrect LW calibration

During the time range specified the UIR and DIR serial numbers were correct but incorrect 
calibration coefficients were applied in the datalogger.  

up_long_hemisp (SN# 30058F3) 
  wrong k1 cal :0.2679 W/(m^2*uV)
  correct k1 cal: 0.2740 W/(m^2*uV)

down_long_hemisp (SN# 30085F3) 
  wrong k1 cal :0.2376 W/(m^2*uV)
  correct k1 cal: 0.2451 W/(m^2*uV)

Data reprocessing completed 20121217.

• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
• inst_down_long_shaded_case_resist
• inst_up_long_dome_resist
• inst_down_long_shaded_dome_resist
• inst_up_long_case_resist
• inst_up_long_hemisp_tp

• inst_down_long_shaded_dome_temp
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• inst_up_long_dome_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated 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)
• down_long_hemisp_shaded_std
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• inst_up_long_case_temp
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• inst_down_long_shaded_case_temp
• up_long_hemisp_std
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)

TWP/SKYRAD/C2 - Tracker Failure

The solar tracker failed resulting in incorrect short_direct_normal and 
down_short_diffuse_hemisp data.  Data are not recoverable.

• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• down_short_diffuse_hemisp_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• short_direct_normal_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)

• inst_direct_normal
• inst_diffuse

TWP/SKYRAD/C2 - Tracker problem

The tracker has a problem in tracking the sun continuously in the southern hemisphere and 
close to the equator. This happened between the March equinox and September equinox 
around solar noon. Affected hours are between 00:00 to 1:00 each day for the specified time 
range.

Note: This will likely occur again in 2013 between March equinox and September equinox 
around solar noon.

Note2: The tracker tracking being off only affects data when there is direct sun, i.e. 
when the sun is not blocked by cloud. Thus in the tropics much of this data are not 
inherently "bad" plus only the direct and diffuse are "bad" when there's direct sun present. The 
QCRad has a test for "tracker off" that detects the tracker not shading the diffuse 
instrument and the NIP not being aimed at the sun when the sun is not blocked by cloud. Thus 
the ARM recommended measure QCRad data set will catch most of these "bad" data and set the 
values to "-9999.9" when the sun is not blocked by cloud, and leave the data that is OK 
when the sun is blocked by cloud (unless that data fails some other testing of course).

• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• down_short_diffuse_hemisp_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• short_direct_normal_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)

• inst_direct_normal
• inst_diffuse

TWP/AERI/C1 - Instrument problem

The instrument exhibits negative spikes in responsivity, which correlate with spikes in 
HBB radiance, as well as the scene mirror not being pointed exactly in the correct HBB 
position.  There appears to be an issue with the scene mirror improperly pointing at the HBB.

• outsideAirTemp
• lat
• calibratedSceneID
• Altitude
• Latitude
• sceneMirPosEncoderMaxDrift
• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)
• channelNumber
• alt
• calibrationCBBtemp
• atmosphericPressure
• atmosphericRelativeHumidity
• time_offset
• AERIunitNumber
• BBsupportStructureTemp
• hatchOpen
• sceneMirrorAngle
• calibrationAmbientTemp
• wnum
• timeHHMMSS
• base_time
• JulianDay
• wnum2
• dateYYMMDD
• systemReleaseNumber
• sceneViewDuration
• calibrationHBBtemp
• standard_dev_mean_rad
• instrumentUnitNumber
• Longitude
• lon
• time
• Time_UTC_hours
• missingDataFlag

• missingDataFlag
• Latitude
• standard_dev_mean_rad
• instrumentUnitNumber
• atmosphericRelativeHumidity
• sceneViewDuration
• Time_UTC_hours
• base_time
• sceneMirPosEncoderMaxDrift
• Altitude
• outsideAirTemp
• time
• BBsupportStructureTemp
• lon
• dateYYMMDD
• Radiation, longwave, downwelling radiance, 0.5 cm-1 resolution, 3.3-5.5 um(mean_rad)
• time_offset
• calibrationAmbientTemp
• JulianDay
• systemReleaseNumber
• lat
• wnum2
• channelNumber
• calibrationHBBtemp
• calibrationCBBtemp
• alt
• wnum
• calibratedSceneID
• timeHHMMSS
• atmosphericPressure
• Longitude
• hatchOpen
• sceneMirrorAngle
• AERIunitNumber

• channelNumber
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• SW_HBB_NEN
• wnumsum14
• SkyNENCh2
• wnumsum11
• wnumsum10
• SkyNENCh1
• wnumsum13
• wnumsum12
• LWskyNENacceptable
• HBB2minNENestimateNo1Ch1
• HBB2minNENestimateNo1Ch2
• hatchOpen
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• SWskyNEN
• Latitude
• HBB2minNENestimateNo2Ch2
• HBB2minNENestimateNo2Ch1
• alt
• sceneMirPosEncoderMaxDrift
• sunSensorIntensity
• HBBstable
• skyViewStdDevRadiance700_705
• wnumsum1
• wnumsum2
• wnumsum3
• wnumsum4
• wnumsum5
• wnumsum6
• wnumsum7
• wnumsum8
• instrumentUnitNumber
• wnumsum9
• lat
• LWresponsivity
• calibrationCBBtemp
• calibratedSceneID
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• missingDataFlag
• SWresponsivity
• LWskyNEN
• atmosphericRelativeHumidity
• HBBtempDrift
• timeHHMMSS
• SWskyNENacceptable
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)
• calibrationHBBtemp
• sceneMirPosEncoderDrift
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
• atmosphericPressure
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
• base_time
• skyViewStdDevRadiance985_990
• JulianDay
• dataAvailable
• frontEndFanAirTempDiff
• sceneMirrorAngle
• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyUniformityCh2)
• Radiation, longwave, radiances, SD, 25 cm-1 spectral avgs, 5.5-18 um(SkyUniformityCh1)
• maxSampleStdDev
• skyViewStdDevRadiance675_680
• ABBmaxTempDiff
• HBBmaxTempDiff
• AERIunitNumber
• systemReleaseNumber
• skyViewStdDevRadiance2295_2300
• lon
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 3.3-5.5 um(SkyBrightnessTempSpectralAveragesCh2)
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• Time_UTC_hours
• Radiation, longwave, brightness temp, 25 cm-1 spectral avgs, 5.5-18 um(SkyBrightnessTempSpectralAveragesCh1)
• dateYYMMDD
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)
• time
• ResponsivitySpectralAveragesCh2
• ResponsivitySpectralAveragesCh1
• outsideAirTemp
• calibrationAmbientTemp
• skyViewStdDevRadiance2282_2287
• Altitude
• time_offset
• LW_HBB_NEN
• sceneViewDuration
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• rainSensorIntensity
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• Longitude
• skyViewStdDevRadiance2510_2515

• time
• ABBviewStdDevRadiance700_705
• ABBviewStdDevRadiance985_990
• skyViewImaginaryRadiance675_680
• instrumentUnitNumber
• calibrationHBBtemp
• HBBviewStdDevRadiance675_680
• motorDriverTemp
• ABBapexTemp
• base_time
• skyViewImaginaryRadiance2510_2515
• HBBbottomTempWeight
• calibrationCBBtemp
• SWskyNENlimit
• BBsupportStructureTemp
• atmosphericPressure
• sceneMirPosEncoderDrift
• Radiation, longwave, brightness temp, atmospheric window, mean, 985-990 cm-1(longwaveWindowAirTemp985_990)
• fixed12KohmResistor
• systemReleaseNumber
• dateYYMMDD
• skyViewStdDevRadiance700_705
• Radiation, longwave, radiance, atmospheric window, mean, 985-990 cm-1(longwaveWindowRadiance985_990)
• skyViewStdDevRadiance675_680
• FFOVhalfAngle
• ABBtopTemp
• mirrorMotorTemp
• Time_UTC_hours
• ABBbottomTemp
• SCEtemp
• maxSampleStdDev
• calibrationAmbientTemp
• HBBviewStdDevRadiance2510_2515
• BBcavityFactor
• ABBviewStdDevRadiance2282_2287
• interferometerWindowTemp
• ABBmaxTempDiff
• Radiation, longwave, radiance, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowRadiance2510_2515)
• missingDataFlag
• SWresponsivity
• ABBapexTempWeight
• coolerExpanderTemp
• Latitude
• skyViewImaginaryRadiance700_705
• JulianDay
• sceneMirrorTemp
• fixed97KohmResistor
• coolerCurrent
• airNearBBsTemp
• LWskyNENlimit
• ABBtopTempWeight
• frontEndFanAirUnheatedTemp
• lon
• Radiation, longwave, radiance, elevated air, mean, 700-705 cm-1(elevatedLayerRadiance700_705)
• Radiation, longwave, brightness temp, atmospheric window, mean, 2510-2515 cm-1(shortwaveWindowAirTemp2510_2515)
• LW_HBB_NEN
• sceneMirPosEncoder
• HBBtopTempWeight
• opticsCompartmentRelativeHumidity
• SW_HBB_NEN
• ABBtempOffset
• fixed2500ohmResistor
• LWskyNENacceptable
• frontEndFanAirTempDiff
• ABBviewStdDevRadiance2295_2300
• rackAmbientTemp
• LWresponsivity
• channelNumber
• expandedInterferogramSize
• HBBbottomTemp
• Radiation, longwave, brightness temp, surface air, mean, 2295-2300 cm-1(surfaceLayerAirTemp2295_2300)
• time_offset
• HBBstable
• LWskyNEN
• HBBapexTempWeight
• sceneMirrorPosition
• hatchOpen
• Radiation, longwave, brightness temp, surface air, mean, 675-680 cm-1(surfaceLayerAirTemp675_680)
• ABBviewStdDevRadiance2510_2515
• Altitude
• Longitude
• sceneMirPosEncoderMaxDrift
• Radiation, longwave, radiance, surface air, mean, 2295-2300 cm-1(surfaceLayerRadiance2295_2300)
• interferometerEnclosureRelativeHumidity
• HBBviewStdDevRadiance700_705
• outsideAirTemp
• BBcontroller2temp
• coadditionsCount
• Radiation, longwave, radiance, elevated air, mean, 2282-2287 cm-1(elevatedLayerRadiance2282_2287)
• coolerPowerSupplyTemp
• sceneMirPosCount
• frontEndFanAirHeatedTemp
• HBBviewStdDevRadiance2295_2300
• Radiation, longwave, brightness temp, elevated air, mean, 700-705 cm-1(elevatedLayerAirTemp700_705)
• HBBtempDriftLimit
• SWskyNEN
• airNearInterferometerTemp
• skyViewImaginaryRadiance2282_2287
• sceneMirrorAngle
• originalInterferogramSize
• lat
• alt
• HBBapexTemp
• skyViewImaginaryRadiance985_990
• HBBtempOffset
• numberOfTerms
• BBcontroller1temp
• HBBviewStdDevRadiance2282_2287
• spareTemp
• timeHHMMSS
• skyViewStdDevRadiance2295_2300
• Radiation, longwave, radiance, surface air, mean, 675-680 cm-1(surfaceLayerRadiance675_680)
• skyViewImaginaryRadiance2295_2300
• sceneViewDuration
• HBBmaxTempDiff
• ABBbottomTempWeight
• sceneMirrorMotorStep
• computerTemp
• coolerCompressorTemp
• dataAvailable
• AERIunitNumber
• calibratedSceneID
• ABBviewStdDevRadiance675_680
• twoMinuteNoiseEstimateFactor
• HBBviewStdDevRadiance985_990
• skyViewStdDevRadiance2282_2287
• interferometerSecondPortTemp
• rainSensorIntensity
• skyViewStdDevRadiance985_990
• skyViewStdDevRadiance2510_2515
• atmosphericRelativeHumidity
• SWskyNENacceptable
• detectorTemp
• originalLaserWavenumber
• Radiation, longwave, brightness temp, elevated air, mean, 2282-2287 cm-1(elevatedLayerAirTemp2282_2287)
• HBBtopTemp
• HBBtempDrift
• sunSensorIntensity
• outputLaserWavenumber

PVC/SKYRAD/M1 - Instrument noise

All instruments on Skyrad exhibit intermittant erratic behavior from 10/05 through 10/23. 
Appears to have been an grounding issue with the IRT installed on Skyrad and replaced 
10/17. After the last problem period on 10/23 the problem resolved itself without operator 
involvement.

All data on Skyrad during these erratic behaviour periods are not recoverable. Bad data 
can generally be identified by screening vBatt for values outside normal operation range of 
13.3-13.6V.

• inst_down_long_hemisp1_case_resist
• inst_global
• inst_diffuse
• inst_sky_ir_signal
• inst_direct_normal
• inst_down_long_hemisp2_case_resist
• inst_down_long_hemisp1_dome_resist
• inst_down_long_hemisp2_dome_resist
• inst_down_long_hemisp1_tp
• inst_down_long_hemisp2_tp

• sky_ir_temp_std
• sky_ir_temp_min
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• down_long_hemisp2_std
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• inst_down_long_hemisp2_case_temp
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2)
• inst_down_long_hemisp2_tp
• down_long_hemisp1_max
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• down_long_hemisp2_min
• down_long_hemisp1_std
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• down_short_diffuse_hemisp_std
• down_long_hemisp2_max
• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• down_short_hemisp_std
• inst_down_long_hemisp2_dome_temp
• inst_down_long_hemisp1_case_temp
• inst_down_long_hemisp1_dome_temp
• IR Brightness Temperature(sky_ir_temp)
• down_long_hemisp1_min
• sky_ir_temp_max
• inst_down_long_hemisp1_tp

SGP/SIRS/E13 - Upwelling LW hemisp connection

On 10/25 an intermittent problem began on the up_long_hemispheric (UIR) instrument dome 
thermistor which resulted in incorrect or missing calculated flux.  Maintenance tightened 
connections on 11/21 which appears to have resolved the problem.

• inst_up_long_case_resist
• inst_up_long_hemisp_tp
• inst_up_long_dome_resist

• up_long_hemisp_std
• 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)
• inst_up_long_case_temp
• inst_up_long_dome_temp
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)

SGP/SIRS/E33 - Reprocess: Partial shading

Shading of the PSP and NIP radiometers occurred after sunrise each day of the reported 
date period, during the time between 1145 and 1215 UTC. Issue is present in the downwelling 
shortwave hemispheric and shortwave direct normal variables. The shading was caused by 
the presence of an antenna that was later relocated. Data will be reprocessed and 
designated as missing (-9999) for the affected time period each day (except where NIP is greater 
than 150 w/m^2).

• inst_direct_normal
• inst_global

• short_direct_normal_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• down_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)

SGP/SIRS/E35 - Reprocess: Partial shading

Shading of the PSP radiometer occurred after sunrise each day of the reported date period, 
during the time between 1200 and 1300 UTC. Issue is present in the downwelling shortwave 
hemispheric variable. The shading was caused by the presence of an antenna that was 
later relocated. Data will be reprocessed and designated as missing for the affected time 
period each day (except where NIP is greater than 150 W/m^2).

• inst_global

• down_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)

SGP/SIRS/E35 - Reprocess: Partial shading

Shading of the NIP radiometer occurred after sunrise each day of the reported date period, 
during the time between 1145 and 1215 UTC. Issue is present in the direct normal 
variable. The shading was caused by the presence of an antenna that was later relocated. Data 
will be reprocessed and designated as missing for the affected time period each day (except 
where NIP is greater than 150 W/m^2).

• inst_direct_normal

• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)

SGP/SIRS/E36 - Reprocess: Partial shading

Shading of the PSP radiometer occurred after sunrise each day of the reported date period, 
during the time between 1200 and 1315 UTC. Issue is present in the downwelling shortwave 
hemispheric variable. The shading was caused by the presence of an antenna that was 
later relocated. Data will be reprocessed and designated as missing for the affected time 
period each day (except where NIP is greater than 150 W/m^2).

• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std

• inst_global

SGP/SIRS/E37 - Reprocess: Partial shading

Shading of the PSP radiometer occurred after sunrise each day of the reported date period, 
during the time between 1230 and 1315 UTC. Issue is present in the downwelling shortwave 
hemispheric variable. The shading was caused by the presence of an antenna that was 
later relocated. Data will be reprocessed and designated as missing for the affected time 
period each day (except where NIP is greater than 150 W/m^2).

• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)

• inst_global

SGP/SIRS/E34 - Tracker failure

The tracker at failed to wake up on 12/26/2012.  The problem persisted throughout the time 
range specified.  On 1/3/2013 the tracker was power cycled and returned to normal 
operation.  

The tracker malfunction adversely affected the data from the direct normal instrument 
(short_direct_normal). Also affected is the diffuse shaded global data (down_short_diffuse).

• short_direct_normal_std
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• down_short_diffuse_hemisp_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)

• inst_diffuse
• inst_direct_normal