SGP/SIRS/E8 - Possible Contamination of DS PSP instrument
|DataStreams:||sgpsirsE8.00, sgpsirsE8.b1, sgpsirs20sE8.a0|
Downwelling hemispheric shortwave values drop at about 1500 GMT under clear sky conditions, typically from about 14:00GMT to 16:00GMT. This may be due to a dirty PSP but maintenance on 03/23/04 18:11 GMT revealed no more than typical light dust. The problem was essentially undetectable by 03/31/04 12:00. The time of day that the problem exists appears to be an exagerated PSP cosine response. No obvious reason presents why the problem appeared and then disappeared within this two week period.