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)