DQR ID | Subject | Data Streams Affected |
---|
D020814.2 | TWP/SKYRAD/C2 - Reprocess: PIR identified as unshaded is really shaded | twpskyrad60sC2.b1 |
D030730.1 | TWP/GNDRAD/C2 - IRT problem | twpgndrad60sC2.b1 |
D030821.5 | TWP/SKYRAD/C2 - IRT incorrect min/delta values | 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 |
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 | twpskyrad20sC2.a0, twpskyrad60sC2.b1, twpskyradC2.00 |
D081222.3 | TWP/SKYRAD/C2 - Tracker failure | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D981222.3 | TWP/GNDRAD/C1 - Incorrect dome calibration factor | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
D990909.1 | TWP/GNDRAD/C2 - Instrument inverted for Calibration | twpgndrad20sC2.a1, twpgndrad60sC2.a1, twpgndradC2.00 |
D990909.2 | Calibration data interruption at TWP Nauru | |
D990909.3 | Cailbration interruption of data at TWP Nauru | |
D990909.4 | TWP/SKYRAD/C2 - Calibration data interruption Nauru | |
D990910.3 | | |
Subject: | TWP/SKYRAD/C2 - Reprocess: PIR identified as unshaded is really shaded |
DataStreams: | twpskyrad60sC2.b1
|
Description: | On 17Sep01 the Global PIR was moved from the unshaded position on the Skyrad stand to the
new 'shaded' spot on the new K&Z tracker. It is still using the same Logger channel as it
did as an unshaded PIR even though it is now shaded. |
Measurements: | twpskyrad60sC2.b1: - Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2(down_long_hemisp2)
- Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Pyrgeometer2(inst_down_long_hemisp2_case_temp)
- Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Standard Deviation(down_long_hemisp2_std)
- Instantaneous Downwelling Pyrgeometer Thermopile, Pyrgeometer2(inst_down_long_hemisp2_tp)
- Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Pyrgeometer2(inst_down_long_hemisp2_dome_temp)
- Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Maxima(down_long_hemisp2_max)
- Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Minima(down_long_hemisp2_min)
|
Subject: | TWP/SKYRAD/C2 - Short direct normal |
DataStreams: | twpskyrad20sC2.a0, twpskyrad60sC2.b1
|
Description: | The short_direct_normal (NIP) data are missing or incorrect due to instrument cable
failure. The cable was replaced.
The short_direct_normal can be calculated using the following relationship for shortwave
radiometers:
global hemispheric = diffuse hemispheric + direct normal *cos (zenith angle) |
Measurements: | twpskyrad60sC2.b1: - Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
- Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max)
- Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min)
- Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
twpskyrad20sC2.a0: - Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile
Voltage(inst_direct_normal)
|
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: - Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp)
- Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Maxima(up_short_hemisp_max)
- Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Standard
Deviation(up_short_hemisp_std) - Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Minima(up_short_hemisp_min)
twpgndrad20sC2.a0: - Instantaneous Upwelling Shortwave Hemispheric Irradiance, Pyranometer(inst_up_short_hemisp)
|
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: - Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
- Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
- Down-welling unshaded pyranometer voltage(down_short_hemisp)
- Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
Deviation(down_short_hemisp_std) - Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
- Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
- Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
Maxima(down_short_diffuse_hemisp_max) - Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std)
- Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
Minima(down_short_diffuse_hemisp_min)
twpskyrad20sC2.a0: - Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer
Thermopile Voltage(inst_diffuse) - Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
Voltage(inst_global) - Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile
Voltage(inst_direct_normal)
|
Subject: | TWP/SKYRAD/C2 - Direct Normal reading too low |
DataStreams: | twpskyrad20sC2.a0, twpskyrad60sC2.b1, twpskyradC2.00
|
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: | twpskyrad60sC2.b1: - Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
- Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max)
- Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min)
- Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
twpskyrad20sC2.a0: - Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile
Voltage(inst_direct_normal)
twpskyradC2.00: - null(Raw data stream - documentation not supported)
|
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: - Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
- Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max)
- Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
- Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
Maxima(down_short_diffuse_hemisp_max) - Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std)
- Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min)
- Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
Minima(down_short_diffuse_hemisp_min) - Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
twpskyrad20sC2.a0: - Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile
Voltage(inst_direct_normal) - Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer
Thermopile Voltage(inst_diffuse)
|
Subject: | TWP/GNDRAD/C1 - Incorrect dome calibration factor |
DataStreams: | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1
|
Description: | The Manus GNDRAD PIR had an incorrect dome factor since installation. The following is an
estimate by Chris Cornwall of the magnitude of the effect of this calibration error. The
magnitude of this error is smaller than the calibration accuracy.
"Processed the instantaneous data from ARCS2 (10, 30 and 50 seconds after the minute)
using 4.32 as the dome factor, and also using 4.00 as the dome factor, as it should have
been. The difference between the calculated irradiance results was negligible, as was
expected with an instrument operating in the downward-facing direction.
Over the three days from 11/06/98 to 11/08/98, the error between the two signals averaged
0.09%. Overnight values were much lower than this, daytime values peaked at 0.42%. The
statistics for these error signals were as follows:
average error 0.000895
standard dev 0.001119
max error 0.004242
min error -0.00064
We should change ARCS1 so it is using the correct value for the groundrad pir dome
coefficient (4.0 instead of 4.32), and we may want to include a DQR stating these findings,
although they are much smaller than the overall uncertainty of the PIR itself." |
Measurements: | twpgndrad20sC1.a1: - Instantaneous PIR1 dome thermistor(pir1_dome_therm)
- Instantaneous PIR1 uncorrected irradiance(pir1_voltage)
- Instantaneous PIR1 case thermistor(pir1_case_therm)
twpgndrad60sC1.b1: - Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Standard
Deviation(up_long_hemisp_std) - Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
- Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
- Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Minima(up_long_hemisp_min)
twpgndrad60sC1.a1: - PIR1 unshaded mean(pir1_mean)
- PIR1 unshaded minimum(pir1_min)
- PIR1 unshaded standard deviation(pir1_sd)
- PIR1 unshaded maximum(pir1_max)
|