Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/23/2004 | 2315 | 01/25/2005 | 1800 | Incorrect |
Subject: | SGP/SIRS/E9 - Unknown -failed PSP ventilator fan |
DataStreams: | sgpsirs20sE9.a0, sgpsirsE9.b1, sgpsirsE9.00 |
Description: | Downwelling shortwave hemispheric (DSH) readings appear to have a slight to moderate negative offset from derived DSH values. At night, this negative offset causes qc flags (since values are below the minimum threshold of -10 W/m^2). Differences between derived and actual DSH values are sometimes on the order of 50 W/m^2 due to this offset. The offset was discovered to be due to a failed ventilator fan which is used to clear the dome of the PSP, the instrument which measures the DSH. The ventilator likely seized or was intermittent and heated the PSP base giving an erroneous DSH reading. Field techs replaced the fan on 01/25/2005 1745GMT. The DSH has been reading normally since that time. |
Suggestions: | Disregard this data. |
Measurements: | sgpsirsE9.b1: more
sgpsirs20sE9.a0: more sgpsirsE9.00: more |