SGP/SIRS - SIRS E9  April 1999  (SERI-QC Results)

Data quality for this site is very good this month. All data are present, and 88% of the 
present daytime data earns passing or low-level flags. This would be higher but for the 
large number of strange-but-true flags, many of them occurring between the 23rd and 27th. 
Overcast skies forced the DS and DD below the appropriate empirical limits on a number of 
afternoons. Late on the 2nd both the DS and the DD were forced above twilight empirical 
limits. Low-level flags seen shortly after sunrise on clear or partly cloudy days indicate 
that the DS is too low, or that the DD or NIP is too high by the three-component test. 
The NIP fell below daytime empirical limits around noon on the 22nd.

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

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