SGP/SIRS/E37 - Instrument problem

The short_direct_normal value is having some issues.  Data is missing starting 0123 GMT on 
6/30 through current.  Data is either close to 0 on clear days or not following normal 
trends prior to the aforementioned period.  down_short_diffuse_hemisp is also suffering 
from some issues.  

Problem looks to have started on 6/17, but may have started earlier than that.

• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
• up_long_hemisp_std
• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
• inst_up_long_case_temp
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• base_time
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std
• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• up_short_hemisp_std
• vBatt
• alt
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std
• inst_up_long_dome_temp
• Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
• down_short_diffuse_hemisp_std
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• inst_down_long_shaded_dome_temp
• Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
• lon
• inst_down_long_shaded_case_temp
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• time_offset
• Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• lat
• Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)
• down_long_hemisp_shaded_std
• Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)

• inst_diffuse
• Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
• lon
• time_offset
• inst_up_long_dome_resist
• inst_down_long_shaded_case_resist
• inst_down_long_shaded_dome_resist
• inst_up_long_case_resist
• inst_global
• inst_direct_normal
• alt
• base_time
• lat
• inst_up_short_hemisp
• inst_up_long_hemisp_tp

SGP/SIRS/E37 - Tracker and NIP repairs

The solar tracker at this site was replaced; communication problems with the replacement 
tracker were performed 7/2/12; NIP repair performed 7/9/12. Data for direct normal (NIP) 
and diffuse (8-48) are incorrect and nonrecoverable during affected period. Longwave data 
are generally unaffected by such tracker failures.

• down_short_diffuse_hemisp_std
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• short_direct_normal_std
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)

• inst_diffuse
• inst_direct_normal

SGP/SIRS/E37 - Reprocess: Partial shading

Shading of the PSP radiometer occurred after sunrise each day of the reported date period, 
during the time between 1230 and 1315 UTC. Issue is present in the downwelling shortwave 
hemispheric variable. The shading was caused by the presence of an antenna that was 
later relocated. Data will be reprocessed and designated as missing for the affected time 
period each day (except where NIP is greater than 150 W/m^2).

• Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• down_short_hemisp_std
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)

• inst_global