SGP/SIRS/E5 - Dirt on PSP Dome

The PSP dome was dirty.  The magnitude of differences from derived 
             vs. measured values of downwelling shortwave were about 75 W/m^2. 
             Preventative maintenance on 4/21 cleaned instruments but they 
             became dirty again immediately afterward and continued to be
             so until the next PM on 5/5.

Use data with caution.  NIP may have been affected during the same period.

• down_short_hemisp_max
• down_short_hemisp_std
• short_direct_normal
• short_direct_normal_min
• down_short_hemisp
• short_direct_normal_std
• down_short_hemisp_min
• short_direct_normal_max

• inst_direct_normal
• inst_global

• Raw data stream - documentation not supported