Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/14/2003 | 0000 | 10/21/2003 | 1600 |
Subject: | SGP/SIRS/E9 - Possible instrument drift |
DataStreams: | sgpsirs20sE9.a0, sgpsirsE9.b1, sgpsirsE9.00 |
Description: | Downwelling shortwave values were too low, dropping below -10 W/m^2 at night and reading 30-50 W/m^2 lower than DS calculated from direct and diffuse measurements during the day. This problem became more noticeable beginning on 10/14, when nighttime values began to drop below -10 W/m^2 consistently. The problem was corrected with the annual instrument changout on 10/23/03. Although the downwelling shortwave instrument (DS) appears to be the problem a more likely scenario is that the cable connections became thermopile. The instrument changeout possibly reseated and corrected any poor connections. |
Suggestions: | No corrections possible, use this data with discretion. |
Measurements: | sgpsirsE9.b1: more
sgpsirs20sE9.a0: more sgpsirsE9.00: more |