NSA/SKYRAD/C1 - Tracker Inoperative

A blown fuse resulted in the tracker not shading the PIR and B&W
and the NIP not following the sun.

• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
• Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)

NSA/SKYRAD/C1 - itermittant IRT bias

A problem with the SKYRAD IRT that itermittantly produced a gradual increase in the sky 
temperature measurement then a sudden correction, as compared to AERI, appears to have been 
caused by a combination of a failing IR detector, a poor signal cable, a contaminated 
(with condensation or frost) mirror or lens, and low ambient temperatures. The positive 
bias was apparently not consistant in either frequency or duration but on days when the 
unusual behavior is observed, it usually occurred from about 00:00 to 06:00 local time. 

The instrument was repaired and recalibrated and the signal cable replaced.

• Sky Infra Red Temperature Minima(sky_ir_temp_min)
• Sky Infra Red Temperature Maxima(sky_ir_temp_max)
• Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std)
• Sky Infra-Red Temperature(sky_ir_temp)

NSA/NIMFR/C1 - No data collected during winter

The sun does not rise above the horizon at the NSA sites between
November and January each year.  During this time period, the MFR
instruments are removed and returned to PNNL for maintenance
and calibration.  The instruments are generally re-installed in
March.

• Offset subtracted from upwelling hemispheric filter5 data(offset_filter5)
• Time offset of tweaks from base_time(time_offset)
• Detector Temperature(head_temp)
• Direct Normal Narrowband Irradiance, Filter 5, raw data as read(direct_normal_narrowband_filter5_raw)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Dummy altitude for Zeb(alt)
• Offset subtracted from upwelling hemispheric filter4 data(offset_filter4)
• Second Detector Temperature(head_temp2)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)
• Data Logger Supply Voltage(logger_volt)
• Offset subtracted from upwelling hemispheric filter1 data(offset_filter1)
• Direct Normal Narrowband Irradiance, Filter 6, raw data as read(direct_normal_narrowband_filter6_raw)
• Direct Normal Narrowband Irradiance, Filter 2, raw data as read(direct_normal_narrowband_filter2_raw)
• Direct Normal Broadband Irradiance, raw data as read(direct_normal_broadband_raw)
• lat(lat)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 4, raw data as read(direct_normal_narrowband_filter4_raw)
• base time(base_time)
• Tube Temperature(tube_temp)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Offset subtracted from upwelling hemispheric filter2 data(offset_filter2)
• Direct Normal Narrowband Irradiance, Filter 1, raw data as read(direct_normal_narrowband_filter1_raw)
• Offset subtracted from upwelling hemispheric filter3 data(offset_filter3)
• Direct Normal Narrowband Irradiance, Filter 3, raw data as read(direct_normal_narrowband_filter3_raw)
• Offset subtracted from upwelling hemispheric broadband data(offset_broadband)
• time(time)
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• lon(lon)
• Offset subtracted from upwelling hemispheric filter6 data(offset_filter6)
• Direct Normal Broadband Irradiance broadband scale applied(direct_normal_broadband)

• Narrowband Direct Horizontal Irradiance, Filter 6(direct_horizontal_narrowband_filter6)
• base time(base_time)
• Normalized filter function data, filter 2, wavelength value obtained during
  bench calibrations(wavelength_filter2)
• Narrowband Direct Horizontal Irradiance, Filter 5(direct_horizontal_narrowband_filter5)
• Data Logger Supply Voltage(logger_volt)
• Elevation Angle(elevation_angle)
• Solar zenith angle(solar_zenith_angle)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Second Detector Temperature(head_temp2)
• Nominal calibration factor, applied to filter6 data(nominal_calibration_factor_filter6)
• Cosine of Solar Zenith Angle(cosine_solar_zenith_angle)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Offset subtracted from upwelling hemispheric filter6 data(offset_filter6)
• lat(lat)
• Nominal calibration factor, applied to filter4 data(nominal_calibration_factor_filter4)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Normalized filter function data, filter 3, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter3)
• Time offset of tweaks from base_time(time_offset)
• Nominal calibration factor, applied to filter1 data(nominal_calibration_factor_filter1)
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)
• Normalized filter function data, filter 1, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter1)
• Offset subtracted from upwelling hemispheric broadband data(offset_broadband)
• Normalized filter function data, filter 3, wavelength value obtained during
  bench calibrations(wavelength_filter3)
• Narrowband Direct Horizontal Irradiance, Filter 4(direct_horizontal_narrowband_filter4)
• Narrowband Direct Horizontal Irradiance, Filter 2(direct_horizontal_narrowband_filter2)
• Direct Horizontal Broadband Irradiance, broadband scale applied(direct_horizontal_broadband)
• Normalized filter function data, filter 4, wavelength value obtained during
  bench calibrations(wavelength_filter4)
• Normalized filter function data, filter 2, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter2)
• lon(lon)
• Normalized filter function data, filter 5, wavelength value obtained during
  bench calibrations(wavelength_filter5)
• Direct Normal Broadband Irradiance broadband scale applied(direct_normal_broadband)
• Nominal calibration factor, applied to broadband data(nominal_calibration_factor_broadband)
• Normalized filter function data, filter 4, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter4)
• Nominal calibration factor, applied to filter3 data(nominal_calibration_factor_filter3)
• Tube Temperature(tube_temp)
• Offset subtracted from upwelling hemispheric filter3 data(offset_filter3)
• Narrowband Direct Horizontal Irradiance, Filter 1(direct_horizontal_narrowband_filter1)
• Normalized filter function data, filter 5, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter5)
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Normalized filter function data, filter 6, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter6)
• Detector Temperature(head_temp)
• Nominal calibration factor, applied to filter5 data(nominal_calibration_factor_filter5)
• Narrowband Direct Horizontal Irradiance, Filter 3(direct_horizontal_narrowband_filter3)
• Offset subtracted from upwelling hemispheric filter1 data(offset_filter1)
• Normalized filter function data, filter 6, wavelength value obtained during
  bench calibrations(wavelength_filter6)
• Air mass(airmass)
• Offset subtracted from upwelling hemispheric filter2 data(offset_filter2)
• Normalized filter function data, filter 1, wavelength value obtained during
  bench calibrations(wavelength_filter1)
• time(time)
• Dummy altitude for Zeb(alt)
• Nominal calibration factor, applied to filter2 data(nominal_calibration_factor_filter2)
• Offset subtracted from upwelling hemispheric filter4 data(offset_filter4)
• Azimuth angle(azimuth_angle)
• Offset subtracted from upwelling hemispheric filter5 data(offset_filter5)

NSA/NIMFR/C2 - No data collected during winter

The sun does not rise above the horizon at the NSA sites between November and January each 
year.  During this time period, the MFR instruments are removed and returned to PNNL for 
maintenance and calibration.  The instruments are generally re-installed in March.

• Offset subtracted from upwelling hemispheric filter6 data(offset_filter6)
• Dummy altitude for Zeb(alt)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Offset subtracted from upwelling hemispheric filter2 data(offset_filter2)
• Direct Normal Narrowband Irradiance, Filter 4, raw data as read(direct_normal_narrowband_filter4_raw)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Direct Normal Broadband Irradiance broadband scale applied(direct_normal_broadband)
• Direct Normal Narrowband Irradiance, Filter 3, raw data as read(direct_normal_narrowband_filter3_raw)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Offset subtracted from upwelling hemispheric filter5 data(offset_filter5)
• Detector Temperature(head_temp)
• time(time)
• Direct Normal Broadband Irradiance, raw data as read(direct_normal_broadband_raw)
• Direct Normal Narrowband Irradiance, Filter 2, raw data as read(direct_normal_narrowband_filter2_raw)
• base time(base_time)
• lon(lon)
• Tube Temperature(tube_temp)
• Direct Normal Narrowband Irradiance, Filter 1, raw data as read(direct_normal_narrowband_filter1_raw)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)
• Offset subtracted from upwelling hemispheric broadband data(offset_broadband)
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Data Logger Supply Voltage(logger_volt)
• lat(lat)
• Offset subtracted from upwelling hemispheric filter4 data(offset_filter4)
• Direct Normal Narrowband Irradiance, Filter 6, raw data as read(direct_normal_narrowband_filter6_raw)
• Direct Normal Narrowband Irradiance, Filter 5, raw data as read(direct_normal_narrowband_filter5_raw)
• Second Detector Temperature(head_temp2)
• Offset subtracted from upwelling hemispheric filter3 data(offset_filter3)
• Time offset of tweaks from base_time(time_offset)
• Offset subtracted from upwelling hemispheric filter1 data(offset_filter1)

• Nominal calibration factor, applied to filter2 data(nominal_calibration_factor_filter2)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)
• Offset subtracted from upwelling hemispheric filter1 data(offset_filter1)
• Normalized filter function data, filter 4, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter4)
• Narrowband Direct Horizontal Irradiance, Filter 1(direct_horizontal_narrowband_filter1)
• Normalized filter function data, filter 6, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter6)
• Time offset of tweaks from base_time(time_offset)
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Nominal calibration factor, applied to filter1 data(nominal_calibration_factor_filter1)
• Nominal calibration factor, applied to filter4 data(nominal_calibration_factor_filter4)
• Normalized filter function data, filter 3, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter3)
• Cosine of Solar Zenith Angle(cosine_solar_zenith_angle)
• Air mass(airmass)
• Offset subtracted from upwelling hemispheric filter6 data(offset_filter6)
• Tube Temperature(tube_temp)
• base time(base_time)
• lat(lat)
• Detector Temperature(head_temp)
• Nominal calibration factor, applied to filter3 data(nominal_calibration_factor_filter3)
• Narrowband Direct Horizontal Irradiance, Filter 2(direct_horizontal_narrowband_filter2)
• Normalized filter function data, filter 4, wavelength value obtained during
  bench calibrations(wavelength_filter4)
• Offset subtracted from upwelling hemispheric broadband data(offset_broadband)
• Second Detector Temperature(head_temp2)
• Nominal calibration factor, applied to broadband data(nominal_calibration_factor_broadband)
• Elevation Angle(elevation_angle)
• Offset subtracted from upwelling hemispheric filter4 data(offset_filter4)
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Normalized filter function data, filter 2, wavelength value obtained during
  bench calibrations(wavelength_filter2)
• Narrowband Direct Horizontal Irradiance, Filter 4(direct_horizontal_narrowband_filter4)
• Direct Horizontal Broadband Irradiance, broadband scale applied(direct_horizontal_broadband)
• Azimuth angle(azimuth_angle)
• Narrowband Direct Horizontal Irradiance, Filter 5(direct_horizontal_narrowband_filter5)
• Normalized filter function data, filter 3, wavelength value obtained during
  bench calibrations(wavelength_filter3)
• lon(lon)
• Offset subtracted from upwelling hemispheric filter2 data(offset_filter2)
• Narrowband Direct Horizontal Irradiance, Filter 3(direct_horizontal_narrowband_filter3)
• Normalized filter function data, filter 5, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter5)
• Normalized filter function data, filter 5, wavelength value obtained during
  bench calibrations(wavelength_filter5)
• Data Logger Supply Voltage(logger_volt)
• Normalized filter function data, filter 6, wavelength value obtained during
  bench calibrations(wavelength_filter6)
• Nominal calibration factor, applied to filter5 data(nominal_calibration_factor_filter5)
• Narrowband Direct Horizontal Irradiance, Filter 6(direct_horizontal_narrowband_filter6)
• time(time)
• Direct Normal Broadband Irradiance broadband scale applied(direct_normal_broadband)
• Nominal calibration factor, applied to filter6 data(nominal_calibration_factor_filter6)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Solar zenith angle(solar_zenith_angle)
• Normalized filter function data, filter 1, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter1)
• Dummy altitude for Zeb(alt)
• Offset subtracted from upwelling hemispheric filter5 data(offset_filter5)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Offset subtracted from upwelling hemispheric filter3 data(offset_filter3)
• Normalized filter function data, filter 1, wavelength value obtained during
  bench calibrations(wavelength_filter1)
• Normalized filter function data, filter 2, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter2)

NSA/SKYRAD/C1 - IRT failure

The IRT failed and was replaced with a spare.

• Sky Infra Red Temperature Minima(sky_ir_temp_min)
• Sky Infra Red Temperature Maxima(sky_ir_temp_max)
• Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std)
• Sky Infra-Red Temperature(sky_ir_temp)

NSA/SKYRAD/C1 - Power outage affecting some SKYRAD instruments

During the power outage the downwelling global measurement from the PSP instrument and 
downwelling diffuse 8-48 instrument shows a slight increase from -5 to +0 W/m2.  This is due 
to removal of thermal offsets induced by the AC heater during the power outage.  This 
heater is installed within the PSP ventilator - it is necessary for the NSA/C1 climate.
The downwelling longwave PIR instrument is unaffected due to case and dome temperature 
corrections.
The IRT is AC powered and was not operational during this time period.

• null(Raw data stream - documentation not supported)

• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Down-welling unshaded pyranometer voltage(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
  Deviation(down_short_hemisp_std)
• Sky Infra-Red Temperature(sky_ir_temp)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std)

• Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
  Voltage(inst_global)
• Instantaneous Sky/Cloud Infrared(inst_sky_ir_signal)
• Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer
  Thermopile Voltage(inst_diffuse)