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.

• Narrowband Direct Normal Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Direct normal narrowband irradiance, filter 6, offset corrected(direct_normal_narrowband_filter6)
• Normalized filter function data, filter 2, wavelength value obtained during
  bench calibrations(wavelength_filter2)
• Azimuth angle(azimuth_angle)
• Normalized filter function data, filter 3, wavelength value obtained during
  bench calibrations(wavelength_filter3)
• Time offset from base_time(time_offset)
• Normalized filter function data, filter 1, wavelength value obtained during
  bench calibrations(wavelength_filter1)
• Air mass(airmass)
• Normalized filter function data, filter 6, wavelength value obtained during
  bench calibrations(wavelength_filter6)
• Normalized filter function data, filter 4, wavelength value obtained during
  bench calibrations(wavelength_filter4)
• Normalized filter function data, filter 5, wavelength value obtained during
  bench calibrations(wavelength_filter5)
• Offset subtracted from hemispheric and diffuse broadband data(offset_broadband)
• Detector temperature(head_temp)
• Nominal calibration factor, applied to filter6 data(nominal_calibration_factor_filter6)
• Nominal calibration factor, applied to filter4 data(nominal_calibration_factor_filter4)
• Nominal calibration factor, applied to filter5 data(nominal_calibration_factor_filter5)
• Nominal calibration factor, applied to filter2 data(nominal_calibration_factor_filter2)
• Nominal calibration factor, applied to filter3 data(nominal_calibration_factor_filter3)
• Second detector temperature(head_temp2)
• Nominal calibration factor, applied to filter1 data(nominal_calibration_factor_filter1)
• Narrowband Direct Horizontal Irradiance, Filter 6, cosine corrected(direct_horizontal_narrowband_filter6)
• Narrowband Direct Normal Irradiance, Filter 3, cosine corrected(direct_normal_narrowband_filter3)
• Narrowband Direct Horizontal Irradiance, Filter 2, cosine corrected(direct_horizontal_narrowband_filter2)
• Direct Normal Broadband Irradiance, cosine corrected, broadband scale applied(direct_normal_broadband)
• Direct normal narrowband irradiance, filter 4, offset corrected(direct_normal_narrowband_filter4)
• Direct Horizontal Narrowband Irradiance, Filter 3(direct_horizontal_narrowband_filter3)
• Narrowband Direct Horizontal Irradiance, Filter 4, cosine corrected(direct_horizontal_narrowband_filter4)
• Narrowband Direct Normal Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Narrowband Direct Horizontal Irradiance, Filter 5, cosine corrected(direct_horizontal_narrowband_filter5)
• Direct normal narrowband irradiance, filter 2, offset corrected(direct_normal_narrowband_filter2)
• Direct horizontal narrowband irradiance, filter 1(direct_horizontal_narrowband_filter1)
• base time in epoch(base_time)
• -180.0 - +180.0(alt)
• Offset subtracted from upwelling hemispheric filter2 data(offset_filter2)
• Offset subtracted from direct normal filter3 data(offset_filter3)
• Offset subtracted from hemispheric filter1 data(offset_filter1)
• Cosine solar zenith angle(cosine_solar_zenith_angle)
• time_in_seconds_since_volume_start(time)
• North Latitude(lat)
• Tube Temperature(tube_temp)
• Data logger supply voltage(logger_volt)
• lon(lon)
• Offset subtracted from hemispheric and diffuse filter6 data(offset_filter6)
• Elevation angle(elevation_angle)
• Solar zenith angle(solar_zenith_angle)
• Offset subtracted from direct normal filter4 data(offset_filter4)
• Offset subtracted from upwelling hemispheric filter5 data(offset_filter5)
• Normalized filter function data, filter 4, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter4)
• Normalized filter function data, filter 5, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter5)
• Normalized filter function data, filter 6, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter6)
• Nominal calibration factor, applied to broadband data(nominal_calibration_factor_broadband)
• Direct Horizontal Broadband Irradiance(direct_horizontal_broadband)
• Normalized filter function data, filter 1, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter1)
• Normalized filter function data, filter 2, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter2)
• Normalized filter function data, filter 3, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter3)

• Direct Normal Broadband Irradiance, cosine corrected, broadband scale applied(direct_normal_broadband)
• Direct Normal Broadband Irradiance, raw data as read(direct_normal_broadband_raw)
• Direct Normal Narrowband Irradiance, Filter 1, raw data as read(direct_normal_narrowband_filter1_raw)
• lon(lon)
• Narrowband Direct Normal Irradiance, Filter 3, cosine corrected(direct_normal_narrowband_filter3)
• Direct normal narrowband irradiance, filter 4, offset corrected(direct_normal_narrowband_filter4)
• Narrowband Direct Normal Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Direct normal narrowband irradiance, filter 2, offset corrected(direct_normal_narrowband_filter2)
• time_in_seconds_since_volume_start(time)
• Data logger supply voltage(logger_volt)
• Offset subtracted from direct normal filter3 data(offset_filter3)
• Offset subtracted from upwelling hemispheric filter2 data(offset_filter2)
• Offset subtracted from hemispheric filter1 data(offset_filter1)
• Second detector temperature(head_temp2)
• base time in epoch(base_time)
• Direct Normal Narrowband Irradiance, Filter 5, raw data as read(direct_normal_narrowband_filter5_raw)
• Direct normal narrowband irradiance, filter 4(direct_normal_narrowband_filter4_raw)
• Time offset from base_time(time_offset)
• Offset subtracted from hemispheric and diffuse filter6 data(offset_filter6)
• Offset subtracted from upwelling hemispheric filter5 data(offset_filter5)
• Offset subtracted from direct normal filter4 data(offset_filter4)
• Tube Temperature(tube_temp)
• Direct Normal Narrowband Irradiance, Filter 6, raw data as read(direct_normal_narrowband_filter6_raw)
• North Latitude(lat)
• Direct normal narrowband irradiance, filter 2(direct_normal_narrowband_filter2_raw)
• Detector temperature(head_temp)
• Narrowband Direct Normal Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Direct normal narrowband irradiance, filter 6, offset corrected(direct_normal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 3, raw data as read(direct_normal_narrowband_filter3_raw)
• -180.0 - +180.0(alt)
• Offset subtracted from hemispheric and diffuse broadband data(offset_broadband)