SGP/QCRAD/E10 - Tracker failure

During the night of 11/05-06 2004 the tracker failed at this location. During CM on 12/01, 
power cycling returned the tracker to service. However, tracker was not properly 
tracking in the AM. Tracker failed again sometime near 01/01/2005.	CM reloaded the tracker 
program and realigned the tracker on 01/26/2005 1600GMT correcting the problem.

Documented in instrument DQR: D041206.1

• Best Estimate Global Downwelling Shortwave Hemispheric Irradiance(BestEstimate_down_short_hemisp)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)

• Best Estimate Global Downwelling Shortwave Hemispheric Irradiance(BestEstimate_down_short_hemisp)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)

• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Best Estimate Global Downwelling Shortwave Hemispheric Irradiance(BestEstimate_down_short_hemisp)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)

• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
• Best Estimate Global Downwelling Shortwave Hemispheric Irradiance(BestEstimate_down_short_hemisp)

SGP/QCRAD/E10 - Missing surface met data

Surface meteorological data were missing during these time periods. Met data is used in a 
variety of quality control checks described below.

Air temperature data is needed for tests on LW up and LW down pyrgeometer case and dome 
temperatures, and tests on the irradiances from upwelling LW/SW and downwelling LW.

The Rayleigh limit diffuse radiation test is based on surface pressure.

There were no instrument DQRs on this problem at the time this report was submitted.

• Wind speed, at 10 meters height(wind_speed)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Irradiance, longwave, downwelling, hemispheric(down_long_hemisp)
• LWupTd
• LWupTc
• wind_direction
• LWdnTc
• LWdnTd
• Pressure, atmospheric, surface, 60-min avg(press)
• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• Humidity, relative(rh)
• Temp_Air
• Precipitation, total(precip)

• Pressure, atmospheric, surface, 60-min avg(press)
• Temp_Air
• LWupTc
• LWupTd
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Humidity, relative(rh)
• Precipitation, total(precip)
• Irradiance, longwave, downwelling, hemispheric(down_long_hemisp)
• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
• Wind speed, at 10 meters height(wind_speed)
• LWdnTc
• Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
• wind_direction
• LWdnTd

SGP/QCRAD/E10 - Reprocess: Wrong calibration factor applied to NIP

From about 950721 to about 970204 (19:12 GMT) the wrong calibration
factor was applied to the NIP at site E10.  The calibration factor
that was used was 1.00E-06 Volts/(W m^2).  The correct calibration
factor is 8.338E-06 Volts/(W m^2).  Thus the calibrated NIP values
found in the netCDF files are too large by a factor of 8.338.

Documented in instrument DQR D970213.1

• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)

• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)

• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)

• Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)

SGP/QCRAD/E10 - noisy upwelling longwave

Upwelling Infrared irradiance signals noisy resulting from problems with pyrgeometer 
signal
cable connections.

Documented in instrument DQRs D030110.37, D030110.36, D031027.1

• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)

• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)

• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)

• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)

SGP/QCRAD/E10 - noisy upwelling shortwave flux

Beginning 6/22, upwelling shortwave values frequently dropped well below 0 W/m^2 
(occasionally dropping below -50 W/m^2) during the nighttime hours.  Daytime values were 
excessively high and noisy. Instrument wiring was suspected and was corrected 07/02/2003.

Documented in instrument DQR D030701.1

• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)

• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)

• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)

• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)

SGP/QCRAD/E10  - LWup Tc/Td bad

Case and dome temperatures for upwelling longwave fluxes are bad during this period so 
some tests cannot be done on upwelling fluxes.

No instrument DQRs exist documenting this problem.

• LWupTd
• LWupTc
• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)

• LWupTc
• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
• LWupTd
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)

• LWupTc
• LWupTd
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)

• Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
• LWupTc
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• LWupTd

SGP/QCRAD/E10  - Upwelling LW Tc/Td/flux questionable

Case and dome temperatures for upwelling longwave flux are sporadically questionable 
during this period corresponding to additional noise in the longwave fluxes.

No instrument DQRs exist documenting this problem.

• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• LWupTd
• LWupTc

• LWupTc
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• LWupTd

• LWupTc
• LWupTd
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)

• LWupTc
• Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
• LWupTd