DQR ID | Subject | Data Streams Affected |
---|---|---|
D120522.11 | TWP/QCRAD/C1 - LWup and dn fluxes Tc/Td bad | twpqcrad1longC1.c1, twpqcrad1longC1.c2, twpqcrad1longC1.s1, twpqcrad1longC1.s2 |
D120522.5 | TWP/QCRAD/C1 - Upwelling LW and SW radiometers inverted | twpqcrad1longC1.c1, twpqcrad1longC1.c2, twpqcrad1longC1.s1, twpqcrad1longC1.s2 |
D120522.7 | TWP/QCRAD/C1 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 downwelling longwave | twpqcrad1longC1.c1, twpqcrad1longC1.c2, twpqcrad1longC1.s1, twpqcrad1longC1.s2 |
D120522.8 | TWP/QCRAD/C1 - Reprocess: NIP calibration | twpqcrad1longC1.c1, twpqcrad1longC1.c2, twpqcrad1longC1.s1, twpqcrad1longC1.s2 |
D120523.1 | TWP/QCRAD/C1 - Downwelling LW flux appears incorrect | twpqcrad1longC1.c1, twpqcrad1longC1.c2, twpqcrad1longC1.s1, twpqcrad1longC1.s2 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/01/2001 | 2000 | 03/13/2003 | 2300 |
11/01/2006 | 0000 | 12/01/2006 | 0000 |
Subject: | TWP/QCRAD/C1 - LWup and dn fluxes Tc/Td bad |
DataStreams: | twpqcrad1longC1.c1, twpqcrad1longC1.c2, twpqcrad1longC1.s1, twpqcrad1longC1.s2 |
Description: | Upwelling and downwelling longwave case and dome temperatures and fluxes appear to be incorrect during these times. No instrument DQRs exist for these time periods |
Measurements: | twpqcrad1longC1.s1:
twpqcrad1longC1.c2:
twpqcrad1longC1.c1:
twpqcrad1longC1.s2:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/01/2003 | 0620 | 12/09/2003 | 1155 |
11/01/2004 | 0040 | 11/05/2004 | 2318 |
11/11/2005 | 2230 | 11/17/2005 | 0030 |
Subject: | TWP/QCRAD/C1 - Upwelling LW and SW radiometers inverted |
DataStreams: | twpqcrad1longC1.c1, twpqcrad1longC1.c2, twpqcrad1longC1.s1, twpqcrad1longC1.s2 |
Description: | The upwelling longwave and shortwave radiometers were inverted during this period for comparison with calibrated instruments. Documented in instrument DQRs: D031215.2, D041106.2, D051123.2 |
Measurements: | twpqcrad1longC1.s1:
twpqcrad1longC1.c2:
twpqcrad1longC1.c1:
twpqcrad1longC1.s2:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/02/2004 | 0200 | 09/09/2005 | 2022 |
Subject: | TWP/QCRAD/C1 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 downwelling |
DataStreams: | twpqcrad1longC1.c1, twpqcrad1longC1.c2, twpqcrad1longC1.s1, twpqcrad1longC1.s2 |
Description: | Downwelling longwave calibration incorrect. Needs to be reprocessed. Described in instrument DQR D051202.5: 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 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] Tc[K] [W/m2] Td[K] [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: | twpqcrad1longC1.s1:
twpqcrad1longC1.c2:
twpqcrad1longC1.c1:
twpqcrad1longC1.s2:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/13/2004 | 0513 | 10/31/2004 | 2230 |
Subject: | TWP/QCRAD/C1 - Reprocess: NIP calibration |
DataStreams: | twpqcrad1longC1.c1, twpqcrad1longC1.c2, twpqcrad1longC1.s1, twpqcrad1longC1.s2 |
Description: | Direct normal flux has incorrect calibration coefficient but can be fixed as described in instrument DQR D041106.1: The tracker rotated and pulled the cable away from the NIP connector. In trying to discover the problem with the NIP a new NIP was put in. When the problem turned out to be the cable, the observers didn't put the former NIP back in. The NIP then in service was 31346E6 RS@45=8.1573 whereas the coefficients used were for the old NIP 299937E6 RS@45=7.8775 |
Measurements: | twpqcrad1longC1.s1:
twpqcrad1longC1.c2:
twpqcrad1longC1.c1:
twpqcrad1longC1.s2:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/13/2005 | 0500 | 11/17/2005 | 0700 |
Subject: | TWP/QCRAD/C1 - Downwelling LW flux appears incorrect |
DataStreams: | twpqcrad1longC1.c1, twpqcrad1longC1.c2, twpqcrad1longC1.s1, twpqcrad1longC1.s2 |
Description: | Downwelling longwave fluxes values appear incorrect during this time. The cause for the strange values is not known. No instrument DQRs exist describing this problem. |
Measurements: | twpqcrad1longC1.s1:
twpqcrad1longC1.c2:
twpqcrad1longC1.c1:
twpqcrad1longC1.s2:
|