DQR ID | Subject | Data Streams Affected |
---|
D050321.1 | PYE/SKYRAD/M1 - Reprocessed: Installation problems | pyeskyrad20sM1.a0, pyeskyrad60sM1.b1 |
D050405.1 | PYE/SKYRAD/M1 - Reprocessed: IRT configuration and calibration | pyeskyrad20sM1.a0, pyeskyrad60sM1.b1, pyeskyradM1.00 |
D050923.1 | PYE/SKYRAD/M1 - IRT bias | pyeskyrad60sM1.b1 |
D060112.4 | NIM/SKYRAD/M1 - IRTs do not agree with AERI | nimskyrad60sM1.b1 |
D060222.1 | NIM/SKYRAD/M1 - Instrument ventilator problem | nimskyrad20sM1.a0, nimskyrad60sM1.b1, nimskyradM1.00 |
D060630.41 | NIM/SKYRAD/M1 - Reprocess: Longwave Calibration error | nimskyrad60sM1.b1 |
D060630.43 | PYE/SKYRAD/M1 - Reprocess: Longwave Calibration error | pyeskyrad60sM1.b1 |
D060915.1 | NIM/SKYRAD/M1 - Unknown problem with PIR1 | nimskyrad20sM1.a0, nimskyrad60sM1.b1, nimskyradM1.00 |
D061006.1 | NIM/SKYRAD/M1 - Tracker inoperative | nimskyrad20sM1.a0, nimskyrad60sM1.b1, nimskyradM1.00 |
D070124.2 | PYE/SKYRAD/M1 - Datalogger program error affected downwelling longwave | pyeskyrad20sM1.a0, pyeskyrad60sM1.b1 |
D070203.2 | NIM/SKYRAD/M1 - station setup and troubleshooting | nimskyrad20sM1.a0, nimskyrad60sM1.b1, nimskyradM1.00 |
D070406.4 | FKB/SKYRAD/M1 - Instrument setup incorrect data | fkbskyrad20sM1.a0, fkbskyrad60sM1.b1, fkbskyradM1.00 |
D070529.3 | FKB/SKYRAD/M1 - IRT bias | fkbskyrad60sM1.b1 |
D090213.1 | HFE/SKYRAD/M1 - IRT bias | hfeskyrad60sM1.b1 |
D090509.1 | GRW/SKYRAD/M1 - Tracker inoperative | grwskyrad20sM1.a0, grwskyrad60sM1.b1 |
D090612.1 | GRW/SKYRAD/M1 - Reprocessed: IRT configuration | grwskyrad60sM1.b1 |
D090715.2 | GRW/SKYRAD/M1 - Possible dirty dome | grwskyrad60sM1.b1, grwskyrad20sM1.a0 |
D090831.1 | GRW/SKYRAD/M1 - Daily brief instrument shading | grwskyrad20sM1.a0, grwskyrad60sM1.b1 |
D091111.4 | GRW/SKYRAD/M1 - IRT grounding | grwskyrad20sM1.a0, grwskyrad60sM1.b1 |
D091228.1 | GRW/SKYRAD/M1 - AOS tower Obstruction | grwskyrad20sM1.a0, grwskyrad60sM1.b1 |
D100606.1 | GRW/SKYRAD/M1 - Short direct normal questionable | grwskyrad20sM1.a0, grwskyrad60sM1.b1 |
D120113.7 | GAN/SKYRAD/M1 - Degraded IRT mirror | ganskyrad60sM1.b1 |
D120127.1 | GAN/SKYRAD/M1 - PIR2 failure | ganskyrad20sM1.a0, ganskyrad60sM1.b1 |
D120204.1 | SBS/SKYRAD/M1 - Noise in downwelling SW hemispheric | sbsskyrad20sM1.a0, sbsskyrad60sM1.b1 |
D120309.2 | GAN/SKYRAD/M1 - PIR1 failure | ganskyrad20sM1.a0, ganskyrad60sM1.b1 |
D120913.1 | PVC/SKYRAD/M1 - Intake Fan Failure | pvcskyrad20sM1.a0, pvcskyrad60sM1.b1 |
D121008.1 | PVC/SKYRAD/M1 - Reprocessed: Incorrect calibration coefficients | pvcskyrad20sM1.a0, pvcskyrad60sM1.b1 |
D121018.10 | PVC/SKYRAD/M1 - Reprocess: Incorrect IRT Configuration | pvcskyrad60sM1.b1 |
D121024.3 | PVC/SKYRAD/M1 - IRT failure | pvcskyrad20sM1.a0, pvcskyrad60sM1.b1 |
D121024.5 | PVC/SKYRAD/M1 - IRT scale factor | pvcskyrad20sM1.a0, pvcskyrad60sM1.b1 |
D121029.1 | PGH/SKYRAD/M1 - Reprocess: Incorrect calibrations | pghskyrad20sM1.a0, pghskyrad60sM1.b1 |
D121128.4 | PVC/SKYRAD/M1 - Instrument noise | pvcskyrad60sM1.b1, pvcskyrad20sM1.a0 |
D121217.8 | PVC/SKYRAD/M1 - IRT disconnected | pvcskyrad60sM1.b1 |
Subject: | PYE/SKYRAD/M1 - Reprocessed: Installation problems |
DataStreams: | pyeskyrad20sM1.a0, pyeskyrad60sM1.b1
|
Description: | The installation of the SKYRAD instrument was not without problems. During all or part of
the time period specified the calibrations were incorrect or incomplete, the downwelling
diffuse and direct normal leads were switched, and the shadowband was severely out of
alignment.
These data have been reprocessed to apply corrections as follows:
1) NIP & PSP-diffuse leads swapped 20050214-20050412.1645
- swapped the NIP and PSP columns in the raw data files
- backed out the original, incorrect calibrations
- applied correct calibrations
2) PSP-diffuse calibration error 050214-050215
- backed out the original, incorrect calibration
- applied correct calibrations
3) PSP-DS cal error 050214-050215
- backed out the original, incorrect calibration
- applied correct calibration
4) NIP cal error 050214-050215 and 050218-050401
- backed out the original, incorrect calibrations
- applied correct calibration
The reprocessed data were archived in February, 2007.
Users are encouraged to still use these data with caution only after a thorough quality
review to be certain the data meet their requirements. |
Measurements: | pyeskyrad60sM1.b1: - Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
- Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer2(down_long_hemisp_shaded2)
- inst_down_long_shaded1_case_temp
- Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer1(down_long_hemisp_shaded1)
- down_long_hemisp_shaded2_min
- inst_down_long_shaded2_dome_temp
- IR Brightness Temperature(sky_ir_temp)
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
- sky_ir_temp_max
- short_direct_normal_std
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
- down_long_hemisp_shaded1_min
- down_long_hemisp_shaded1_std
- sky_ir_temp_std
- sky_ir_temp_min
- inst_down_long_shaded2_case_temp
- down_long_hemisp_shaded2_max
- Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
- down_short_diffuse_hemisp_std
- down_long_hemisp_shaded2_std
- Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
- inst_down_long_shaded1_dome_temp
- down_short_hemisp_std
- Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
- down_long_hemisp_shaded1_max
- Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
pyeskyrad20sM1.a0: - inst_down_long_shaded1_dome_resist
- inst_diffuse
- inst_sky_ir_signal
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
- inst_direct_normal
- inst_down_long_shaded2_dome_resist
- inst_down_long_shaded1_case_resist
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
- inst_global
- inst_down_long_shaded2_case_resist
|
Subject: | NIM/SKYRAD/M1 - Instrument ventilator problem |
DataStreams: | nimskyrad20sM1.a0, nimskyrad60sM1.b1, nimskyradM1.00
|
Description: | Data quality office first reported that PIR1 and PIR2 appear to be deviating more than
typical during the daylight hours. It was found that the Skyrad PIR ventilator fans were
building up debris on the intake air filter. Obstructed air flow results in solar heating
of the PIR ventilator housing in the later part of the day and biasing the incomming IR
irradiance values. The slow buildup was insidious and wasn't discovered and corrected
(i.e. ventilator fans cleaned on a regular and frequent basis) until Feb 23rd. On or around
December 23rd was when this problem may have first started. We are unable to quantify the
extent of the problem in W/m2. Normal deviation between PIRs is typically 3-5 W/m2. |
Measurements: | nimskyrad20sM1.a0: - Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
- inst_down_long_shaded2_case_resist
- inst_down_long_shaded2_dome_resist
- inst_down_long_shaded1_case_resist
- inst_down_long_shaded1_dome_resist
nimskyrad60sM1.b1: - inst_down_long_shaded2_dome_temp
- down_long_hemisp_shaded1_std
- down_long_hemisp_shaded1_min
- down_long_hemisp_shaded1_max
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
- Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer1(down_long_hemisp_shaded1)
- down_long_hemisp_shaded2_min
- Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer2(down_long_hemisp_shaded2)
- down_long_hemisp_shaded2_max
- inst_down_long_shaded1_dome_temp
- down_long_hemisp_shaded2_std
- inst_down_long_shaded2_case_temp
- inst_down_long_shaded1_case_temp
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
nimskyradM1.00: - Raw data stream - documentation not supported
|
Subject: | NIM/SKYRAD/M1 - Unknown problem with PIR1 |
DataStreams: | nimskyrad20sM1.a0, nimskyrad60sM1.b1, nimskyradM1.00
|
Description: | Spikes in Shaded 1 occur frequently during this time period, resulting in differences b/t
shaded1 and shaded2 exceeding 20W/m2. Instrument connections were checked and a spare
PIR instrument was tried in the place of PIR1 (shaded1). After returning the original PIR1
to its original location data again looked good and very close to PIR2. Problem appears
resolved but exact cure is unknown. |
Measurements: | nimskyrad20sM1.a0: - Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
- inst_down_long_shaded2_case_resist
- inst_down_long_shaded2_dome_resist
- inst_down_long_shaded1_case_resist
- inst_down_long_shaded1_dome_resist
nimskyrad60sM1.b1: - inst_down_long_shaded2_dome_temp
- down_long_hemisp_shaded1_std
- down_long_hemisp_shaded1_min
- down_long_hemisp_shaded1_max
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
- Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer1(down_long_hemisp_shaded1)
- down_long_hemisp_shaded2_min
- Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer2(down_long_hemisp_shaded2)
- down_long_hemisp_shaded2_max
- inst_down_long_shaded1_dome_temp
- down_long_hemisp_shaded2_std
- inst_down_long_shaded2_case_temp
- inst_down_long_shaded1_case_temp
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
nimskyradM1.00: - Raw data stream - documentation not supported
|
Subject: | NIM/SKYRAD/M1 - Tracker inoperative |
DataStreams: | nimskyrad20sM1.a0, nimskyrad60sM1.b1, nimskyradM1.00
|
Description: | Starting on 9/12 the NIM radiometer tracker drifted enough due to sinking supports and a
drifting clock that the direct normal measurments (NIP) and the downwelling hemispheric
diffuse shortwave measurments (8-48) were adversely affected in the afternoon hours. The
shortwave hemispheric global instrument (PSP) and downelling hemispheric longwave shaded1
and shaded2 (PIR) are unaffected by this problem.
The tracker problem greatly affected direct measurements and affected the diffuse
measurement to a lesser extent. There are no redundant measurements for these instruments.
However, during this time range the data collected before local noon (aprox 1140GMT) for all
shortwave Skyrad instruments appear to be good. |
Measurements: | nimskyrad20sM1.a0: - inst_diffuse
- inst_direct_normal
nimskyrad60sM1.b1: - Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
- down_short_diffuse_hemisp_std
- Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
- short_direct_normal_std
- Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
nimskyradM1.00: - Raw data stream - documentation not supported
|
Subject: | PYE/SKYRAD/M1 - Datalogger program error affected downwelling longwave |
DataStreams: | pyeskyrad20sM1.a0, pyeskyrad60sM1.b1
|
Description: | The excitation delays used in measuring the PIR1 case thermistor, "Case1", and the PIR2
dome thermistor, "Dome2", were discovered to have been incorrectly set to 0 in the Skyrad
datalogger program when the new CR23X based Skyrad loggers were installed. The result of
no delay in these measurements results in an error in the measured resistance of the
thermistors, Case1 and Dome2, and thus the calculated PIR1 and PIR2 irradiances. The
absolute value of the errors are inversely proportial to temperature.
At Pt Reyes, we are unable to determine if the excitation delay problem was present. The
first Skyrad datalogger program installed at PYE was correct but later versions modified
and uploaded in March and April of 2005 may have had the Delay0 problem.
The problem also can not be determined from the data. Pt. Reyes temperature fluctuations
throughout the year are maritime and fall into a relatively narrow range in 2005 between
2.5-20C. The Delay0 problem introduces larger errors into PIR1 and PIR2 irradiance
calculations as the temperature drops. At the lowest temperature at Pt Reyes in 2005 (approx
2.5C occurring in March) the largest PIR1 error would be -.48 W/m2 and PIR2 +.38 W/m2.
The scale of these errors are smaller than the resolution of the instrument and are lost
in the normal variation of the instrument readings. Cursory review of the thermistor data
during cold periods does not show any discernable biases. Furthermore, the data logger
programming "error" due to the Delay0 problem is an order of magnitude less than the total
estimated measurement uncertainty of the pyrgeometer data from any ARM installation (+/-
5 W/sq m for 4-coeff and +/- 10 W/sq m for 2-coeff calibrations).
Due to these issues, no Delay0 corrections will be applied to PYE Skyrad data. |
Measurements: | pyeskyrad60sM1.b1: - inst_down_long_shaded2_case_temp
- down_long_hemisp_shaded2_max
- down_long_hemisp_shaded2_std
- inst_down_long_shaded1_dome_temp
- Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer2(down_long_hemisp_shaded2)
- inst_down_long_shaded1_case_temp
- Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer1(down_long_hemisp_shaded1)
- down_long_hemisp_shaded2_min
- inst_down_long_shaded2_dome_temp
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
- down_long_hemisp_shaded1_max
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
- down_long_hemisp_shaded1_min
- down_long_hemisp_shaded1_std
pyeskyrad20sM1.a0: - inst_down_long_shaded2_dome_resist
- inst_down_long_shaded1_case_resist
- inst_down_long_shaded1_dome_resist
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
- inst_down_long_shaded2_case_resist
|
Subject: | NIM/SKYRAD/M1 - station setup and troubleshooting |
DataStreams: | nimskyrad20sM1.a0, nimskyrad60sM1.b1, nimskyradM1.00
|
Description: | This station was collecting data for the first time at this location - There were multiple
instrument setup problems (PIR cabling, IRT setup, tracker operation)that were being
corrected during this time. Radiometer data is unreliable during this period. |
Measurements: | nimskyrad20sM1.a0: - inst_down_long_shaded2_case_resist
- inst_down_long_shaded2_dome_resist
- inst_global
- inst_sky_ir_signal
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
- inst_diffuse
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
- inst_down_long_shaded1_case_resist
- inst_down_long_shaded1_dome_resist
- inst_direct_normal
nimskyrad60sM1.b1: - inst_down_long_shaded2_dome_temp
- down_long_hemisp_shaded1_std
- Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
- down_long_hemisp_shaded1_min
- down_long_hemisp_shaded1_max
- Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer1(down_long_hemisp_shaded1)
- Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer2(down_long_hemisp_shaded2)
- down_short_hemisp_std
- inst_down_long_shaded1_dome_temp
- down_long_hemisp_shaded2_std
- Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
- inst_down_long_shaded2_case_temp
- short_direct_normal_std
- inst_down_long_shaded1_case_temp
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
- Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
- sky_ir_temp_max
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
- IR Brightness Temperature(sky_ir_temp)
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
- down_long_hemisp_shaded2_min
- down_long_hemisp_shaded2_max
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
- sky_ir_temp_min
- Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
- down_short_diffuse_hemisp_std
- sky_ir_temp_std
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
nimskyradM1.00: - Raw data stream - documentation not supported
|
Subject: | FKB/SKYRAD/M1 - Instrument setup incorrect data |
DataStreams: | fkbskyrad20sM1.a0, fkbskyrad60sM1.b1, fkbskyradM1.00
|
Description: | FKB station initial setup and configuration - all radiometer data before the end date of
this time range is suspect. If this data is needed refer to DQ flags and manual assessment
to determine if data is usable. |
Measurements: | fkbskyrad20sM1.a0: - alt
- inst_down_long_hemisp2_dome_resist
- inst_down_long_hemisp2_case_resist
- inst_direct_normal
- lat
- inst_global
- inst_diffuse
- inst_down_long_hemisp1_case_resist
- inst_down_long_hemisp1_tp
- base_time
- inst_down_long_hemisp1_dome_resist
- inst_down_long_hemisp2_tp
- time
- time_offset
- inst_sky_ir_signal
- lon
fkbskyradM1.00: - Raw data stream - documentation not supported
fkbskyrad60sM1.b1: - lon
- sky_ir_temp_std
- down_long_hemisp1_min
- sky_ir_temp_min
- base_time
- down_long_hemisp2_max
- logger_temp
- down_long_hemisp2_std
- vBatt
- time_offset
- lat
- sky_ir_temp_max
- inst_down_long_hemisp2_tp
- time
- inst_down_long_hemisp2_dome_temp
- inst_down_long_hemisp1_case_temp
- down_long_hemisp2_min
- down_long_hemisp1_max
- down_long_hemisp1_std
- inst_down_long_hemisp1_dome_temp
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
- short_direct_normal_std
- down_short_hemisp_std
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
- alt
- Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
- inst_down_long_hemisp1_tp
- down_short_diffuse_hemisp_std
- Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
- Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
- Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2)
- Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
- inst_down_long_hemisp2_case_temp
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
- IR Brightness Temperature(sky_ir_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 Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
|
Subject: | GRW/SKYRAD/M1 - Tracker inoperative |
DataStreams: | grwskyrad20sM1.a0, grwskyrad60sM1.b1
|
Description: | The solar tracker arms were caught and pulled way out of alignment. Problem corrected by
OPs at 0815Z May 11th. All bolts tightened and alignment and tracking checked.
Down_short_hemisp_diffuse (8-48 instrument)is incorrect and not recoverable.
short_direct_normal (NIP instrument) is suspect during this time as well. down_short_hemisp (PSP
instrument) was unaffected. |
Measurements: | grwskyrad20sM1.a0: - inst_direct_normal
- inst_diffuse
grwskyrad60sM1.b1: - 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)
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
- down_short_diffuse_hemisp_std
- short_direct_normal_std
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
|
Subject: | GRW/SKYRAD/M1 - Possible dirty dome |
DataStreams: | grwskyrad60sM1.b1, grwskyrad20sM1.a0
|
Description: | The difference between downwelling shortwave hemispheric irradiance and derived
downwelling shortwave hemispheric irradiance was larger than normal (>50W/m2) and was most
noticeable at lower zenith angles. The problem spontaneously resolved itself on 7/16 without any
specific callouts by the GRW cleaning personnel on their reports. Short_direct_normal
datastream is suspected to be low due to potentially dirty NIP instrument window during
this time period. The commencement of this problem corresponds with a rain event early
7/12. The possibility of other radiometers affected by dirty domes is also possible.
Longwave instruments are typically immune to this level of contamination. |
Measurements: | grwskyrad20sM1.a0: - inst_global
- inst_diffuse
- inst_direct_normal
grwskyrad60sM1.b1: - Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_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
- down_short_diffuse_hemisp_std
- short_direct_normal_std
- 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)
- 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)
- Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
|
Subject: | GRW/SKYRAD/M1 - Daily brief instrument shading |
DataStreams: | grwskyrad20sM1.a0, grwskyrad60sM1.b1
|
Description: | 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. |
Measurements: | grwskyrad20sM1.a0: - inst_direct_normal
- inst_global
grwskyrad60sM1.b1: - 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)
|
Subject: | GRW/SKYRAD/M1 - IRT grounding |
DataStreams: | grwskyrad20sM1.a0, grwskyrad60sM1.b1
|
Description: | The IRT analog output line appears to have adversely affected the
SKYRAD datalogger grounding. This resulted in intermittent anomalous readings across all
SKYRAD datalogger channels including logger voltage.
The problem was corrected by regrounding the analog cable. |
Measurements: | grwskyrad20sM1.a0: - inst_down_long_hemisp2_case_resist
- inst_down_long_hemisp1_dome_resist
- inst_down_long_hemisp1_tp
- inst_down_long_hemisp2_dome_resist
- inst_global
- inst_diffuse
- inst_down_long_hemisp2_tp
- inst_sky_ir_signal
- inst_down_long_hemisp1_case_resist
- inst_direct_normal
grwskyrad60sM1.b1: - Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
- inst_down_long_hemisp1_case_temp
- short_direct_normal_std
- sky_ir_temp_max
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
- down_long_hemisp2_min
- down_long_hemisp2_max
- Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
- Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
- Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
- Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2)
- Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
- IR Brightness Temperature(sky_ir_temp)
- inst_down_long_hemisp2_tp
- logger_temp
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
- down_short_hemisp_std
- down_short_diffuse_hemisp_std
- sky_ir_temp_std
- sky_ir_temp_min
- inst_down_long_hemisp2_case_temp
- inst_down_long_hemisp1_dome_temp
- Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
- inst_down_long_hemisp1_tp
- vBatt
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
- down_long_hemisp2_std
- inst_down_long_hemisp2_dome_temp
- down_long_hemisp1_std
- down_long_hemisp1_max
- down_long_hemisp1_min
|
Subject: | PVC/SKYRAD/M1 - Reprocessed: Incorrect calibration coefficients |
DataStreams: | pvcskyrad20sM1.a0, pvcskyrad60sM1.b1
|
Description: | 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 |
Measurements: | pvcskyrad20sM1.a0: - 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
pvcskyrad60sM1.b1: - 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
|
Subject: | PGH/SKYRAD/M1 - Reprocess: Incorrect calibrations |
DataStreams: | pghskyrad20sM1.a0, pghskyrad60sM1.b1
|
Description: | 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 |
Measurements: | pghskyrad20sM1.a0: - inst_global
- inst_diffuse
- inst_sky_ir_signal
- inst_direct_normal
pghskyrad60sM1.b1: - 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
|
Subject: | PVC/SKYRAD/M1 - Instrument noise |
DataStreams: | pvcskyrad60sM1.b1, pvcskyrad20sM1.a0
|
Description: | 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. |
Measurements: | pvcskyrad20sM1.a0: - 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
pvcskyrad60sM1.b1: - 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
|