"bsrn" platform at SGP data problem

As reported in ARM Technical Report ARM-TR-002, the 'bsrn' data at the SGP CF
was not in agreement with the co-located SIRS E13 and C1 data. Subsequent
discussion led to the conclusion that ther was a voltage problem with the
'bsrn' data logger. In development and testing of the Diffuse Correction and
Best Estimate Flux VAPs, it has been shown that all 'bsrn' data, all
instruments, suffered this data logger problem. The result is noisy and
slightly offset values, seemingly at random throughout the period from October
1998 through the end of the 'bsrn' data stream and it's replacement by the BRS
system. All this data needs to be colored 'questionable', and all data users
need to be informed that either the SIRS E13 or SIRS C1 data should be used
instead.

• Average reference voltage(vref)
• Standard deviation for pyrgeometer thermopile(ssig)
• Downwelling hemispheric infrared irradiance(psig)
• Batter Voltage(vbat)
• Pyrheliometer voltage(nip)
• CALCULATED downwelling hemispheric diffuse solar irradiance(psp1)
• Standard deviation for pyrgeometer dome thermistor resistance(stdome)
• Standard deviation for pyrgeometer case thermistor resistance(stcase)
• Standard deviation for reference(svref)
• Observed downwelling hemispheric total solar irradiance (direct+diffuse)(psp2)
• Standard deviation for pyrheliometer(snip)
• Average pyrgeometer dome thermistor resistance(ptdome)
• Standard deviation for shaded pyranometer(spsp1)
• Standard deviation for unshaded pyranometer(spsp2)
• Average pyrgeometer case thermistor resistance(ptcase)

• null(Raw data stream - documentation not supported)

• Calculated Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer
  from 20s data(calculated_down_long_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Full
  corrected (Weighted Mean absolute deviation using Median)(dsdh_full_corrected)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std)
• Detector flux (Down-welling pyrgeometer thermopile voltage * PIR-DIR calib-coef)
  Calculated value from 20s data(detector_flux)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Ventilated Pyrgeometer Case Temperature(case_temperature)
• Down-welling pyrgeometer thermopile voltage(down_long_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_long_hemisp_max)
• Effective temperature(effective_temperature)
• Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
  Deviation(down_long_hemisp_std)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min)
• Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_long_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Ventilated Pyrgeometer Dome Temperature(dome_temperature)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
• Down-welling unshaded pyranometer voltage(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Dutton
  corrected(dsdh_dutton_corrected)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
  Deviation(down_short_hemisp_std)
• Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)

• CALCULATED downwelling hemispheric diffuse solar irradiance(psp1)
• Pyrheliometer voltage(nip)
• Downwelling hemispheric infrared irradiance(psig)
• Observed downwelling hemispheric total solar irradiance (direct+diffuse)(psp2)