DQR ID | Subject | Data Streams Affected |
---|
D040812.3 | TWP/SKYRAD/C2 - UVB Data questionable/incorrect due to uncontrolled sensor temperature | twpskyrad20sC2.a1, twpskyrad60sC2.b1 |
D041015.3 | TWP/GNDRAD/C2 - incorrect IRT calibration | twpgndrad60sC2.b1 |
D041026.2 | TWP/SKYRAD/C2 - IRT bias | twpskyrad60sC2.b1 |
D050219.2 | TWP/SKYRAD/C2 - IRT bias | twpskyrad60sC2.b1 |
D050504.2 | TWP/GNDRAD/C2 - IRT connector | twpgndrad60sC2.b1 |
D050815.1 | TWP/GNDRAD/C2 - IRT power supply failed | twpgndradC2.00, twpgndrad60sC2.b1 |
D050926.6 | TWP/GNDRAD/C2 - Gndrad inverted for radiometer | twpgndrad60sC2.b1 |
D051202.6 | TWP/SKYRAD/C2 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 downwelling longwave | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D060630.32 | TWP/SKYRAD/C2 - Reprocess: Longwave Calibration error | twpskyrad60sC2.b1 |
D060630.35 | TWP/GNDRAD/C2 - Reprocess: Longwave Calibration error | twpgndrad60sC2.b1 |
D060804.1 | TWP/SKYRAD/C2 - IRT signal loss | twpskyrad60sC2.b1 |
D061016.1 | TWP/SKYRAD/C2 - IRT signal | twpskyrad60sC2.b1 |
D070110.1 | TWP/GNDRAD/C2 - IRT signal | twpgndrad60sC2.b1 |
D070206.1 | TWP/SKYRAD/C2 - Short direct normal | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D070404.2 | TWP/SKYRAD/C2 - IRT measurement error | twpskyrad60sC2.b1 |
D070406.6 | TWP/GNDRAD/C2 - Reprocess: IRT calibration | twpgndrad60sC2.b1 |
D071204.1 | TWP/GNDRAD/C2 - Reprocessed: Incorrect calibration | twpgndrad20sC2.a0, twpgndrad60sC2.b1 |
D071204.2 | TWP/SKYRAD/C2 - Reprocessed: Incorrect calibrations | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D080313.2 | TWP/SKYRAD/C2 - Direct Normal reading too low | twpskyradC2.00, twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D081222.3 | TWP/SKYRAD/C2 - Tracker failure | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D090328.1 | TWP/SKYRAD/C2 - Tracker inoperative | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D090605.2 | TWP/SKYRAD/C2 - Instrument grounding problem | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D090610.2 | TWP/SKYRAD/C2 - IRT Missing | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D090702.1 | TWP/GNDRAD/C2 - IRT missing | twpgndrad60sC2.b1 |
D090714.1 | TWP/SKYRAD/C2 - Reprocess: IRT configuration | twpskyrad60sC2.b1 |
D100604.2 | TWP/GNDRAD/C2 - IRT power failure | twpgndrad20sC2.a0, twpgndrad60sC2.b1 |
D101218.1 | TWP/QCRAD/C2 - Instrument grounding problem | twpqcrad1longC2.c1, twpqcrad1longC2.s1 |
D101222.2 | TWP/SWF/C2 - instrument grounding problem | twp1swfanalskyrad1longC2.c1, twp15swfanalskyrad1longC2.c1 |
D101223.1 | TWP/SKYRAD/C2 - Suspect PIR1 data | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D110831.1 | TWP/SKYRAD/C2 - Tracker failure | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D111026.1 | TWP/SKYRAD/C2 - IRT power failure | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
Subject: | TWP/SKYRAD/C2 - UVB Data questionable/incorrect due to uncontrolled sensor temperature |
DataStreams: | twpskyrad20sC2.a1, twpskyrad60sC2.b1
|
Description: | The UVB was not temperature controlled to 25C as required
to ensure accurate data. UVB data should ONLY be used after
checking both the bit_data and twpskyrad20sC1.a1 uvb_temp
or inst_down_uvb_temp. UVB data where the UVB temperature
was outside the range of 24-26C should not be used. |
Measurements: | twpskyrad20sC2.a1: - inst_down_uvb_temp
- Irradiance, ultraviolet, downwelling (UV Biometer)(inst_down_uvb_irradiance)
twpskyrad60sC2.b1: - Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
- down_uvb_std
- Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
- Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
|
Subject: | TWP/GNDRAD/C2 - Gndrad inverted for radiometer |
DataStreams: | twpgndrad60sC2.b1
|
Description: | Gndrad instruments PIR and PSP inverted for replacement instrument
installation and comparison |
Measurements: | twpgndrad60sC2.b1: - psp1_min
- sfc_ir_temp_std
- Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
- Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
- pir1_min
- pir1_max
- Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
- psp1_mean
- Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
- Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
- psp1_max
- up_short_hemisp_std
- Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
- psp1_sd
- Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
- Effective Surface (Skin) Temperature(sfc_ir_temp)
- up_long_hemisp_std
- Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
- pir1_mean
- pir1_sd
|
Subject: | TWP/SKYRAD/C2 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 downwelling longwave |
DataStreams: | twpskyrad20sC2.a0, twpskyrad60sC2.b1
|
Description: | The excitation delays using in measuring the PIR1 case thermistor commonly named "Case1"
and the PIR2 dome thermistor called "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.
Users can apply the temperature dependent irradiance corrections shown in the table below.
Recall that the reported uncertainty of PIRs is typically +-.25% to +-.5% or 1 to 2
W/m2. The error corrections become the same order of magnitude or larger than the instrument
uncertainties at or below 260K or 9F.
Irradiance Correction Table for Skyrad (TWP and NSA) DIR1 and DIR2 Irradiance
DIR1 DIR1 DIR2 DIR2
T[F] Tcase[K] Correction[W/m2] Tdome[K]
Correction[W/m2]
109.4 316.13 0.00 316.13 0.00
100.5 311.20 -0.15 311.20 0.12
93.2 307.14 -0.12 307.14 0.10
87.0 303.70 -0.10 303.70 0.08
81.6 300.70 -0.17 300.70 0.14
77.0 298.15 -0.22 298.15 0.18
59.4 288.35 -0.34 288.35 0.27
47.4 281.72 -0.23 281.72 0.18
38.5 276.74 -0.42 276.74 0.34
31.3 272.77 -0.48 272.77 0.38
25.4 269.48 -0.61 269.48 0.49
20.3 266.67 -0.67 266.67 0.54
16.0 264.25 -0.82 264.25 0.66
12.1 262.11 -0.98 262.11 0.79
8.7 260.19 -0.97 260.19 0.78
5.6 258.46 -1.07 258.46 0.86
2.7 256.89 -1.17 256.89 0.94
0.1 255.44 -1.33 255.44 1.07
-2.3 254.11 -1.41 254.11 1.13
-4.5 252.87 -1.43 252.87 1.15
-6.6 251.71 -1.52 251.71 1.22
-8.5 250.63 -1.63 250.63 1.31
-10.4 249.62 -1.73 249.62 1.39
-12.2 248.58 -1.79 248.58 1.44
-15.4 246.82 -1.93 246.82 1.55
-18.3 245.23 -2.05 245.23 1.65
-20.9 243.78 -2.22 243.78 1.78
-23.3 242.44 -2.36 242.44 1.89
-25.5 241.21 -2.58 241.21 2.07
-27.5 240.07 -2.65 240.07 2.13
-29.5 239.01 -2.75 239.01 2.21
-31.3 238.00 -3.02 238.00 2.42 |
Measurements: | twpskyrad60sC2.b1: - down_long_hemisp_shaded1_max
- down_long_hemisp_shaded2_min
- down_long_hemisp_shaded1_std
- down_long_hemisp_shaded1_min
- down_long_hemisp_shaded2_std
- down_long_hemisp_shaded2_max
- Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer2(down_long_hemisp_shaded2)
- Irradiance, longwave, downwelling, hemispheric, shaded pyrgeometer1(down_long_hemisp_shaded1)
twpskyrad20sC2.a0: - inst_down_long_shaded1_case_resist
- inst_down_long_shaded2_dome_resist
- inst_down_long_shaded1_dome_resist
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded1_tp)
- inst_down_long_shaded2_case_resist
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer2)(inst_down_long_hemisp_shaded2_tp)
|
Subject: | TWP/GNDRAD/C2 - Reprocessed: Incorrect calibration |
DataStreams: | twpgndrad20sC2.a0, twpgndrad60sC2.b1
|
Description: | The Gndrad PSP was changed out 11/25 but the datalogger program was not updated until
11/30.
PSP #31293 installed 20071125.2202. Correct calibration coefficient = 123.46.
Reprocessed to correct upwelling shortwave hemispheric irradiance (US) by:
US(new) = (US(old) / 123.56 ) * 123.46
Reprocessing completed March 2008. |
Measurements: | twpgndrad60sC2.b1: - up_short_hemisp_std
- Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
- Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
- Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
twpgndrad20sC2.a0:
|
Subject: | TWP/SKYRAD/C2 - Reprocessed: Incorrect calibrations |
DataStreams: | twpskyrad20sC2.a0, twpskyrad60sC2.b1
|
Description: | The SKYRAD PSPs were changed out 11/25 but the datalogger program was not updated until
11/30.
Reprocessed to correct calibration per:
down_short_diffuse(corrected) = down_short_diffuse(orig) * (118.18/112.42)
short_direct_normal(corrected)= short_direct_normal(orig) * (122.20/118.11)
down_short_hemips(corrected) = down_short_hemisp(orig) * (133.16/137.57)
Reprocessing completed March 2008. |
Measurements: | twpskyrad60sC2.b1: - 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)
- 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)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
- down_short_diffuse_hemisp_std
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
- down_short_hemisp_std
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
twpskyrad20sC2.a0: - inst_diffuse
- inst_direct_normal
- inst_global
|
Subject: | TWP/SKYRAD/C2 - Direct Normal reading too low |
DataStreams: | twpskyradC2.00, twpskyrad20sC2.a0, twpskyrad60sC2.b1
|
Description: | The NIP (direct_normal shortwave irradiance) measurement was reading too low during this
time period. No TWP Ops documentation could be found to determine the cause but data
review indicate that the NIP appeared to be reading low by about 25W/m2 during this period.
The NIP data had well defined steps in irradiance when compared to three component checks
indicating the problem period. |
Measurements: | twpskyradC2.00: - Raw data stream - documentation not supported
twpskyrad60sC2.b1: - 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)
twpskyrad20sC2.a0:
|
Subject: | TWP/SKYRAD/C2 - Tracker failure |
DataStreams: | twpskyrad20sC2.a0, twpskyrad60sC2.b1
|
Description: | Tracker failed to wake up on 12/17. Ops reset tracker on 12/21.
The affected instruments are the 8-48 (down_short_diffuse) and NIP (direct_normal)
shortwave instruments. |
Measurements: | twpskyrad60sC2.b1: - Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_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)
- 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)
twpskyrad20sC2.a0: - inst_direct_normal
- inst_diffuse
|
Subject: | TWP/SKYRAD/C2 - Tracker inoperative |
DataStreams: | twpskyrad20sC2.a0, twpskyrad60sC2.b1
|
Description: | The tracker failed in park position. Tracker was replaced 5/14 but did not resume fully
normal operation until 5/18.
The down_short_diffuse and short_direct_normal data are directly affected by this failure.
These data are not recoverable. |
Measurements: | twpskyrad60sC2.b1: - Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_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)
- 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)
twpskyrad20sC2.a0: - inst_direct_normal
- inst_diffuse
|
Subject: | TWP/SKYRAD/C2 - Instrument grounding problem |
DataStreams: | twpskyrad20sC2.a0, twpskyrad60sC2.b1
|
Description: | During this time period 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. |
Measurements: | twpskyrad60sC2.b1: - 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)
- Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
- IR Brightness Temperature(sky_ir_temp)
- sky_ir_temp_std
- down_long_hemisp1_min
- inst_down_long_hemisp2_tp
- Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
- 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)
- sky_ir_temp_min
- down_short_hemisp_std
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
- down_long_hemisp1_std
- Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
- 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 Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
- sky_ir_temp_max
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
- inst_down_long_hemisp1_case_temp
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
twpskyrad20sC2.a0: - 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_sky_ir_signal
- inst_down_long_hemisp2_dome_resist
- inst_global
- inst_down_long_hemisp1_dome_resist
|
Subject: | TWP/QCRAD/C2 - Instrument grounding problem |
DataStreams: | twpqcrad1longC2.c1, twpqcrad1longC2.s1
|
Description: | A grounding problem with the skyrad data logger (discussed in DQR D090605.2) created
intermittent anomalous voltages and incorrect data. Days listed in this DQR are periods where
bad data could be clearly identified; data from other days in this date range should be
treated with caution. |
Measurements: | twpqcrad1longC2.c1: - Irradiance, longwave, downwelling, hemispheric(down_long_hemisp)
- Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
- Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
- LWdnTd
- LWdnTc
- LWupTd
- Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
- Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
- Best Estimate Global Downwelling Shortwave Hemispheric Irradiance(BestEstimate_down_short_hemisp)
- Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
- LWupTc
twpqcrad1longC2.s1: - LWupTc
- LWupTd
- Best Estimate Global Downwelling Shortwave Hemispheric Irradiance(BestEstimate_down_short_hemisp)
- Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
- Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
- Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
- Irradiance, longwave, downwelling, hemispheric(down_long_hemisp)
- LWdnTd
- LWdnTc
- Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
|
Subject: | TWP/SKYRAD/C2 - Tracker failure |
DataStreams: | twpskyrad20sC2.a0, twpskyrad60sC2.b1
|
Description: | 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. |
Measurements: | twpskyrad60sC2.b1: - 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
twpskyrad20sC2.a0: - 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
|