DQR ID | Subject | Data Streams Affected |
---|---|---|
D100325.1 | SGP/SIRS/E9 - Downwelling SW sensor alignment/level | sgpsirsE9.b1, sgpsirs20sE9.a0 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/18/2009 | 1625 | 03/16/2010 | 1518 |
Subject: | SGP/SIRS/E9 - Downwelling SW sensor alignment/level |
DataStreams: | sgpsirsE9.b1, sgpsirs20sE9.a0 |
Description: | On clear days, the down_short_hemisp data (PSP instrument) exhibit asymmetry in its daily output curve especially when compared to derived downwelling shortwave. Ops corrected the problem by re-leveling the PSP on 3/16/2010. The issue may likely be due to a slowly sinking platform at this site or inadvertent loosening of instrument hold down screws. Problem may have developed slowly over the last year. Corrections are not easily quantifiable. Suggest using derived downwelling shortwave which is not dependent on the PSP instrument: derived DS = down_short_diffuse + short_direct_normal * cos(zenith angle) |
Measurements: | sgpsirs20sE9.a0:
sgpsirsE9.b1:
|