NSA/SKYRAD/C2 - Summer solstice shading of radiometers

On and around the summer solstice, the NIP (Direct Normal shortwave measurement) and PSP 
(global hemispheic shortwave measurement) radiometers are shaded by other instruments or 
support structures. Shading azimuths have been determined for this site.  The radiometer 
mentor suggests not using the data from the NIP and PSP radiometers when the sun is within 
the following azimuth bounds (typically from May 8th to August 5th of each year):
Instr   Obstruction   AzStart   AzEnd
NIP     rad table     356       17
PSP     mfrsr         341       353

Note: There are a number of objects near the NW,N and NE horizon that may affect sunrise 
data near the summer soltice.

Avoid NIP and PSP data during the periods noted above.

• Downwelling shortwave hemispheric irradiance, pyranometer, maxima(down_short_hemisp_max)
• PSP shaded maximum(psps_max)
• PSP1 mean(psp1_mean)
• Shortwave direct normal irradiance, pyrheliometer(short_direct_normal)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
  Deviation(down_short_hemisp_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• NIP minimum(nip_min)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
• NIP mean(nip_mean)
• Down-welling unshaded pyranometer voltage(down_short_hemisp)
• PSP shaded standard deviation(psps_sd)
• PSP shaded mean(psps_mean)
• PSP1 unshaded minimum(psp1_min)
• PSP shaded minimum(psps_min)
• PSP1 unshaded standard deviation(psp1_sd)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Minima(down_short_hemisp_min)
• Shortwave direct normal irradiance, pyrheliometer, minima(short_direct_normal_min)
• NIP standard deviation(nip_sd)
• NIP maximum(nip_max)
• PSP1 maximum(psp1_max)