| Subject: | SGP/BRS/C1 - low downwelling shortwave readings |
| DataStreams: | sgpbrs20sC1.a0, sgpbrsC1.00, sgpbrsC1.b1
|
| Description: | Downwelling shortwave (DS) values frequently drop below -10 W/m^2 at night, and are
consistently 20-40 W/m^2 less than the calculated downwelling shortwave during the day in
clear-sky conditions. Corrective maintenance on 12/17/2004 corrected this offset. It is not
clear which CM action corrected the problem since the DS instrument cable was grounded to
a new location and the DS ventilator fan was found in poor condition and was replaced.
Either of these issues could have led to the problem observed in this instrument. |
| Measurements: | sgpbrsC1.b1: - Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
- down_short_hemisp_std
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
- Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
sgpbrs20sC1.a0:
sgpbrsC1.00: - Raw data stream - documentation not supported
|