Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
03/12/2002 | 0000 | 06/07/2010 | 2359 | Does not affect quality |
Subject: | TWP/QCRAD/C1/C2/C3 - error in qc flags |
DataStreams: | twpqcrad1longC3.c1, twpqcrad1longC1.c1, twpqcrad1longC2.c1 |
Description: | In the qc_down_short_diffuse_hemisp field, QC failures from the test indicated by bit_13, "data failed tracker off test", were set incorrectly as bit_9, "GSW2SumSW (93 > SZA > 75 and SumSW > 50; GSW/SumSW < 0.85 or GSW/SumSW > 1.15)". Solar tracker failures are correctly indicated in the aqc_down_short_diffuse_hemisp field. In the qc_short_direct_normal field, QC failures from the test indicated by bit_10, "data failed tracker off test", were set incorrectly as bit_9, "GSW2SumSW (93 > SZA > 75 and SumSW > 50; GSW/ SumSW < 0.85 or GSW/SumSW > 1.15)". Solar tracker failures are correctly indicated in the aqc_short_direct_normal field. This is a software problem in the VAP that impacts all dates for which a solar tracker failure occurred prior to 20100608 for each facility. The 20020312 start date was chosen because the DQR system can not link multiple start/end date/times with multiple facilities within the same report. As a result, the latest start date corresponding to C3 was chosen. The actual start dates for which this problem could have occurred for each facility are as follows: C1: 19961010 C2: 19981029 C3: 20020312 Please note that if a solar tracker failure is not indicated by the aqc_down_short_diffuse_hemisp and/or aqc_short_direct_normal fields you can ignore this DQR. |
Suggestions: | For down_short_diffuse_hemisp use the auxiliary QC fields aqc_down_short_diffuse_hemisp, aqc_GSW2SumSW, and aqc_DifSW2GSW. For short_direct_normal use the auxiliary QC fields aqc_short_direct_normal, aqc_GSW2SumSW, and aqc_DifSW2GSW. For down_short_diffuse_hemisp use the auxiliary QC fields aqc_down_short_diff use_hemisp, aqc_GSW2SumSW, and aqc_DifSW2GSW. For short_direct_normal use the auxiliary QC fields aqc_short_direct_normal, aqc_GSW2SumSW, and aqc_DifSW2GSW. |
Measurements: | twpqcrad1longC2.c1: more
twpqcrad1longC1.c1: more twpqcrad1longC3.c1: more |