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.

data are unavailable

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

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