TWP/SWF/C2 - instrument grounding problem

A grounding problem with the skyrad data logger (discussed in DQR D090605.2) created 
intermittent anomalous voltages and incorrect flux data.  Measured all-sky fluxes and derived 
cloud fraction during these periods are incorrect. The identification of clear sky 
periods during these days and estimated clear sky fluxes may also be incorrect.  Days listed in 
this DQR are periods where bad data could be clearly identified; data from other days in 
this date range should be treated with caution.

• sswfluxdn_measured
• difratiodn_measured_stdev
• sswfluxdn_cloudeffect
• Measured Surface Albedo from Shortwave Irradiance Measurements (alb)(albedosw_measured)
• Measured Downwelling Global Shortwave Irradiance (gsw)(gswfluxdn_measured)
• Measured Downwelling Direct Shortwave Irradiance (dir)(dirfluxdn_measured)
• difcloudeffect_normalized
• difratiodn_measured
• difswfluxdn_cloudeffect
• gswfluxdn_cloudeffect
• Irradiance, shortwave, downwelling, diffuse, measured(difswfluxdn_measured)
• guvbdn_measured
• Fractional Sky Cover(cloudfraction)

• sswfluxdn_measured
• gswfluxdn_cloudeffect
• difswfluxdn_cloudeffect
• Measured Downwelling Global Shortwave Irradiance (gsw)(gswfluxdn_measured)
• Measured Surface Albedo from Shortwave Irradiance Measurements (alb)(albedosw_measured)
• Measured Downwelling Direct Shortwave Irradiance (dir)(dirfluxdn_measured)
• sswfluxdn_cloudeffect
• difratiodn_measured
• Irradiance, shortwave, downwelling, diffuse, measured(difswfluxdn_measured)
• guvbdn_measured