SGP/SIRS/E16 - Questionable downwelling SW hemisp
There was an abnormal difference between downwelling shortwave hemispheric data and derived downwelling shortwave hemispheric data 7/16 - 7/24 between ~16:00-20:00 GMT. Data review indicates that the derived downwelling shortwave hemispheric (down_short_hemisp) data and possibly the shortwave direct normal (short_direct_normal) data were slightly lower (up to 50W/m2) than usual at these times. Either the downwelling shortwave instrument dome or the short direct normal instrument window may have been dirty during this time. The downwelling shortwave instrument (PSP) is most likely to blame. After recorded precipitation on 7/24 and 7/25 the problem resolved. Ops visit on 7/26 recorded no observable contamination. The instrument mentors guesses that the precipitation event effectively cleaned the instruments. No recurrence has been observed since 7/24.
Suspect data are not recoverable or correctable