SGP/SIRS/E37 - Dome Contamination

During the time range specified the down_short_hemsip data stream (PSP instrument) had 
dome contamination which adversely affected the data from 2100 to 2200 GMT each clear day 
during the period.

down_short_hemisp data from the a0 and b1 files should be avoided during the times 

specified.  The user can calculate down_short_hemisp using the following equation for each 
one minute of data:
down_short_hemisp = short_direct_normal*cos(zenith angle) + down_short_diffuse hemisp
 
Note that the best estimate downwelling shortwave irradiance from the QCRADVAP uses the equation above by default.


down_short_hemisp data from the a0 and b1 files should be avoided during the times 
s
pecified.  The user can calculate down_short_hemisp using the following equation for each one minute of data:
down_short_hemisp = short_direct_normal*cos(zenith angle) + down_short_diffuse hemisp
 
Note that the best estimate downwelling shortwave irradiance from the QCRADVAP uses the equation above by default.

• inst_global

• down_short_hemisp
• down_short_hemisp_max
• down_short_hemisp_std
• down_short_hemisp_min