DQR ID | Subject | Data Streams Affected |
---|---|---|
D010907.4 | "bsrn" platform at SGP data problem | sgpbsrn1duttC1.c1, sgpbsrnC1.00, sgpbsrnC1.a0, sgpbsrnC1.a1 |
D050420.2 | SGP/BSRN/C1 - Reprocess: Adjust Direct Normal Irradiance | sgpbsrnC1.00, sgpbsrnC1.a0, sgpbsrnC1.a1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/01/1998 | 0000 | 01/22/2001 | 2359 |
Subject: | "bsrn" platform at SGP data problem |
DataStreams: | sgpbsrn1duttC1.c1, sgpbsrnC1.00, sgpbsrnC1.a0, sgpbsrnC1.a1 |
Description: | As reported in ARM Technical Report ARM-TR-002, the 'bsrn' data at the SGP CF was not in agreement with the co-located SIRS E13 and C1 data. Subsequent discussion led to the conclusion that ther was a voltage problem with the 'bsrn' data logger. In development and testing of the Diffuse Correction and Best Estimate Flux VAPs, it has been shown that all 'bsrn' data, all instruments, suffered this data logger problem. The result is noisy and slightly offset values, seemingly at random throughout the period from October 1998 through the end of the 'bsrn' data stream and it's replacement by the BRS system. All this data needs to be colored 'questionable', and all data users need to be informed that either the SIRS E13 or SIRS C1 data should be used instead. |
Measurements: | sgpbsrnC1.a0:
sgpbsrnC1.00:
sgpbsrn1duttC1.c1:
sgpbsrnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/28/2000 | 1430 | 01/22/2001 | 1739 |
Subject: | SGP/BSRN/C1 - Reprocess: Adjust Direct Normal Irradiance |
DataStreams: | sgpbsrnC1.00, sgpbsrnC1.a0, sgpbsrnC1.a1 |
Description: | Direct normal broadband shortwave irradiance measured by NIP s/n 30721E6 was found to have a 4.1% negative bias when compared in-situ with absolute cavity radiometer measurements taken on August 21, 2000. The estimated measurement uncertainty of the calibration of NIP s/n 30721E6 on July 18, 2000 was -2.8% to +3.5%. The additional uncertainties of the field (rather than calibration) data acquisition system and installation contribute to the large negative bias found in the data on August 21, 2000. Data from NIP s/n 30721E6 can be adjusted according to the in-situ comparisons to reduce the apparent measurement bias. |
Measurements: | sgpbsrnC1.a0:
sgpbsrnC1.00:
sgpbsrnC1.a1:
|