SGP/SIRS - SIRS E8 April 1999 (SERI-QC Results)

Data quality for this site is very good this month. All data are present, and 95.5% of the 
present daytime data are assigned passing or low-level flags. Low-level flags seen 
mid-day into early afternoon on clear or partly cloudy days indicate that the DS is too high 
by the three-component test. Alternatively, the DD or NIP may be too low. Strange-but-true 
flags can be seen mid-day on cloudy and overcast. Shortly after sunrise on the 22nd the 
DS and DD were forced below twilight empirical limits by overcast conditions. Shortly 
after noon on the 26th the DS was higher than daytime empirical limits for a short time, 
possibly a case of sunlight reflecting from the edge of a cloud onto the radiometer. No 
problems noted in the UIR, DIR or US signals.

• Down-welling unshaded pyranometer voltage(down_short_hemisp)
• 10 meter Upwelling Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
• Downwelling longwave hemispheric irradiance, pyrgeometer(down_long_hemisp)
• 25 meter Upwelling Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp)
• -180.0 - +180.0(alt)
• North Latitude(lat)
• Direct-beam normal solar irradiance(nip)
• Time offset from base_time(time_offset)
• Shaded pyranometer voltage(short_diffuse)
• Up-welling pyrgeometer dome thermistor resistance(up_long_dome_resist)
• Down-welling pyrgeometer dome thermistor resistance(down_long_dome_resist)
• Up-welling pyrgeometer case thermistor resistance(up_long_case_resist)
• Down-welling pyrgeometer case thermistor resistance(down_long_case_resist)
• lon(lon)
• base time in epoch(base_time)

• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
  Deviation(down_short_hemisp_std)
• Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
  Deviation(down_long_hemisp_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Pyrgeometer, Minima(down_short_diffuse_hemisp_min)
• Downwelling shortwave hemispheric irradiance, pyranometer, maxima(down_short_hemisp_max)
• Downwelling Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(down_long_hemisp_max)
• Downwelling longwave hemispheric irradiance, pyrgeometer(down_long_hemisp)
• 10 meter Upwelling Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
• Battery voltage(vBatt)
• lon(lon)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Pyranometer, Standard
  Deviation(down_short_diffuse_hemisp_std)
• North Latitude(lat)
• Downwelling shortwave diffuse hemispheric irradiance, pyranometer, maxima(down_short_diffuse_hemisp_max)
• Shortwave direct normal irradiance, pyrheliometer(short_direct_normal)
• base time in epoch(base_time)
• Shortwave direct normal irradiance, pyrheliometer, minima(short_direct_normal_min)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Standard Deviation(up_long_hemisp_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Upwelling longwave hemispheric irradiance, pyrgeometer, maxima(up_long_hemisp_max)
• 25 meter Upwelling Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp)
• Down-welling unshaded pyranometer voltage(down_short_hemisp)
• -180.0 - +180.0(alt)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Maxima(up_short_hemisp_max)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(up_short_hemisp_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
• Time offset from base_time(time_offset)
• Downwelling Longwave Hemispheric Irradiance, Pyrgeometer, Minima(down_long_hemisp_min)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Minima(up_long_hemisp_min)
• Upwelling shortwave hemispheric irradiance, pyranometer, minima(up_short_hemisp_min)