Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
07/11/2003 | 1630 | 07/16/2003 | 1840 | Incorrect |
Subject: | SGP/SIRS/E5 - Downwelling direct normal (NIP) reporting low |
DataStreams: | sgpsirsE5.b1, sgpsirs20sE5.a0, sgpsirsE5.00 |
Description: | There were large differences between the measured downwelling shortwave (DS) and the downwelling shortwave calculated from direct (NIP) and diffuse (DD) readings. It appears that the direct normal shortwave readings were much too low, particularly on 7/14 and 7/15. It appears that the diffuse instrument was being shaded properly, but the NIP was not tracking the sun. The problem was corrected during the preventative maintenance visit on 7/16/03 at 1840GMT. The technician reported doing the quarterly connection corrosion checks and ventilator fan cleaning, the NIP was described as having "dry-light dust" on the window, no mention of tracker alignment was made. Although uncertain, a bad connection at some point in the instrument wiring was likely to blame and was eliminated during the corrosion inspection process. |
Suggestions: | Disregard this data. |
Measurements: | sgpsirsE5.b1: more
sgpsirs20sE5.a0: more sgpsirsE5.00: more |