TWP/GNDRAD/C2 - Calibration Check; GNDRAD instruments inverted

During calibration check periods the gndrad instruments are inverted
to compare with the skyrad pir and psp.

Do not use the data during these periods as they are not measuring
upwelling radiation.

• PSP1 unshaded minimum(psp1_min)
• PIR1 unshaded standard deviation(pir1_sd)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Minima(up_long_hemisp_min)
• PIR1 minimum(pir1_min)
• PSP1 unshaded standard deviation(psp1_sd)
• Upwelling longwave hemispheric irradiance, pyrgeometer, maxima(up_long_hemisp_max)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Standard Deviation(up_long_hemisp_std)
• PIR1 unshaded maximum(pir1_max)
• 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)
• PSP1 mean(psp1_mean)
• 25 meter Upwelling Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp)
• 10 meter Upwelling Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
• PIR1 mean(pir1_mean)
• PSP1 maximum(psp1_max)
• Upwelling shortwave hemispheric irradiance, pyranometer, minima(up_short_hemisp_min)

• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Maxima(up_short_hemisp_max)
• PSP1 mean(psp1_mean)
• 10 meter Upwelling Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
• PSP1 unshaded minimum(psp1_min)
• PIR1 minimum(pir1_min)
• PIR1 unshaded standard deviation(pir1_sd)
• PSP1 maximum(psp1_max)
• Upwelling shortwave hemispheric irradiance, pyranometer, minima(up_short_hemisp_min)
• Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Minima(up_long_hemisp_min)
• PIR1 unshaded maximum(pir1_max)
• 25 meter Upwelling Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp)
• Upwelling longwave hemispheric irradiance, pyrgeometer, maxima(up_long_hemisp_max)
• PSP1 unshaded standard deviation(psp1_sd)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(up_short_hemisp_std)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Standard Deviation(up_long_hemisp_std)
• PIR1 mean(pir1_mean)

• Instantaneous PIR1 uncorrected irradiance(pir1_voltage)
• Instantaneous PIR1 case thermistor(pir1_case_therm)
• Instantaneous PIR1 dome thermistor(pir1_dome_therm)