SGP/MFRSR/E13 - Reprocess: Angstrom Exponent Error

The data used to calculate the angstrom exponent was incorrect.  These
fields should not be used.  All other fields are considered good.

• Angstrom exponent(barnard_angstrom_exponent)
• Angstrom exponent(michalsky_angstrom_exponent)

NSA/NIMFR/C2 - Instrument problem.  Tube heater not functioning properly.

The instrument was installed after winter calibration and the tube heater was found to be 
operating erratically.  The purpose of the heating the tube is to keep condensation from 
forming on the window.  Though erratic, the tube temperature was generally warm enough 
that no condensation should have formed.  There was never any evidence of this in the 
irradiance data.  Since it is not believed to have affected the adversely, this DQR is being 
assigned as transparent.

• base time(base_time)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Time offset of tweaks from base_time(time_offset)
• angstrom exponent(angstrom_exponent)
• aerosol optical depth filter 3(aerosol_optical_depth_filter3)
• aerosol optical depth filter 2(aerosol_optical_depth_filter2)
• Dummy altitude for Zeb(alt)
• aerosol optical depth filter 1(aerosol_optical_depth_filter1)
• Direct Normal Broadband Irradiance broadband scale applied(direct_normal_broadband)
• aerosol optical depth filter 4(aerosol_optical_depth_filter4)
• aerosol optical depth filter 5(aerosol_optical_depth_filter5)
• time(time)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• lat(lat)
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• lon(lon)

• 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)
• Normalized filter function data, filter 3, wavelength value obtained during
  bench calibrations(wavelength_filter3)
• Direct Normal Narrowband Irradiance, Filter 3, raw data as read(direct_normal_narrowband_filter3_raw)
• total optical depth direct narrowband filter 5(total_optical_depth_filter5)
• Second Detector Temperature(head_temp2)
• Normalized filter function data, filter 1, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter1)
• 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)
• Nominal calibration factor, applied to broadband data(nominal_calibration_factor_broadband)
• surface pressure(surface_pressure)
• sun to earth distance(sun_to_earth_distance)
• Ozone column amount from TOMS satellite(Ozone_column_amount)
• Direct Normal Narrowband Irradiance, Filter 2, raw data as read(direct_normal_narrowband_filter2_raw)
• Normalized filter function data, filter 3, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter3)
• Normalized filter function data, filter 2, wavelength value obtained during
  bench calibrations(wavelength_filter2)
• Normalized filter function data, filter 1, wavelength value obtained during
  bench calibrations(wavelength_filter1)
• Nominal calibration factor, applied to filter4 data(nominal_calibration_factor_filter4)
• Azimuth angle(azimuth_angle)
• Narrowband Direct Horizontal Irradiance, Filter 2(direct_horizontal_narrowband_filter2)
• Ozone absorption coefficient used for filter 5(Ozone_absorption_coefficient_filter5)
• Top of atmosphere direct normal solar irradiance(TOA_irradiance)
• Nominal calibration factor, applied to filter6 data(nominal_calibration_factor_filter6)
• Nominal calibration factor, applied to filter5 data(nominal_calibration_factor_filter5)
• Rayleigh optical depth adjusted for surface pressure for filter 2(Rayleigh_optical_depth_filter2)
• total optical depth direct narrowband filter 3(total_optical_depth_filter3)
• Direct Normal Narrowband Irradiance, Filter 5, raw data as read(direct_normal_narrowband_filter5_raw)
• Narrowband Direct Horizontal Irradiance, Filter 3(direct_horizontal_narrowband_filter3)
• total optical depth direct narrowband filter 2(total_optical_depth_filter2)
• aerosol optical depth filter 3(aerosol_optical_depth_filter3)
• total optical depth direct narrowband filter 4(total_optical_depth_filter4)
• Ozone absorption coefficient used for filter 1(Ozone_absorption_coefficient_filter1)
• Dummy altitude for Zeb(alt)
• aerosol optical depth filter 2(aerosol_optical_depth_filter2)
• Direct Normal Broadband Irradiance broadband scale applied(direct_normal_broadband)
• Offset subtracted from upwelling hemispheric filter6 data(offset_filter6)
• aerosol optical depth filter 1(aerosol_optical_depth_filter1)
• lat(lat)
• Nominal calibration factor, applied to filter3 data(nominal_calibration_factor_filter3)
• Rayleigh optical depth adjusted for surface pressure for filter 1(Rayleigh_optical_depth_filter1)
• Ozone absorption coefficient used for filter 4(Ozone_absorption_coefficient_filter4)
• Offset subtracted from upwelling hemispheric filter4 data(offset_filter4)
• total optical depth direct narrowband filter 1(total_optical_depth_filter1)
• Air mass(airmass)
• time(time)
• aerosol optical depth filter 5(aerosol_optical_depth_filter5)
• Solar zenith angle(solar_zenith_angle)
• Narrowband Direct Horizontal Irradiance, Filter 1(direct_horizontal_narrowband_filter1)
• Offset subtracted from upwelling hemispheric broadband data(offset_broadband)
• Offset subtracted from upwelling hemispheric filter5 data(offset_filter5)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)
• lon(lon)
• aerosol optical depth filter 4(aerosol_optical_depth_filter4)
• base time(base_time)
• Data Logger Supply Voltage(logger_volt)
• Direct Horizontal Broadband Irradiance, broadband scale applied(direct_horizontal_broadband)
• Cosine of Solar Zenith Angle(cosine_solar_zenith_angle)
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Narrowband Direct Horizontal Irradiance, Filter 5(direct_horizontal_narrowband_filter5)
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Flag determined using cloud screen algorithm(variability_flag)
• 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)
• angstrom exponent(angstrom_exponent)
• Direct Normal Narrowband Irradiance, Filter 6, raw data as read(direct_normal_narrowband_filter6_raw)
• Ozone absorption coefficient used for filter 3(Ozone_absorption_coefficient_filter3)
• Ozone absorption coefficient used for filter 2(Ozone_absorption_coefficient_filter2)
• Direct Normal Broadband Irradiance, raw data as read(direct_normal_broadband_raw)
• solar constant corrected for solar distance for the Direct Narrowb and Filter5(Io_filter5)
• Elevation Angle(elevation_angle)
• Normalized filter function data, filter 6, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter6)
• Offset subtracted from upwelling hemispheric filter2 data(offset_filter2)
• Normalized filter function data, filter 5, measured transmittance value obtained
  during bench calibrations(normalized_transmittance_filter5)
• Narrowband Direct Horizontal Irradiance, Filter 4(direct_horizontal_narrowband_filter4)
• Time offset of tweaks from base_time(time_offset)
• Offset subtracted from upwelling hemispheric filter3 data(offset_filter3)
• Tube Temperature(tube_temp)
• Narrowband Direct Horizontal Irradiance, Filter 6(direct_horizontal_narrowband_filter6)
• Wavelength(wavelength)
• 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)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Rayleigh optical depth adjusted for surface pressure for filter 3(Rayleigh_optical_depth_filter3)
• Rayleigh optical depth adjusted for surface pressure for filter 5(Rayleigh_optical_depth_filter5)
• Detector Temperature(head_temp)
• solar constant corrected for solar distance for the Direct Narrowb and Filter3(Io_filter3)
• Nominal calibration factor, applied to filter1 data(nominal_calibration_factor_filter1)
• solar constant corrected for solar distance for the Direct Narrowb and Filter1(Io_filter1)
• Rayleigh optical depth adjusted for surface pressure for filter 4(Rayleigh_optical_depth_filter4)
• solar constant corrected for solar distance for the Direct Narrowb and Filter2(Io_filter2)
• Direct Normal Narrowband Irradiance, Filter 1, raw data as read(direct_normal_narrowband_filter1_raw)
• Nominal calibration factor, applied to filter2 data(nominal_calibration_factor_filter2)
• solar constant corrected for solar distance for the Direct Narrowb and Filter4(Io_filter4)

• null(Raw data stream - documentation not supported)

• Time offset of tweaks from base_time(time_offset)
• rejected points for the final fit for the Direct Narrowband Filter3, Michalsky(michalsky_rejected_filter3)
• log(irradiance) for the Direct Narrowband Filter2, Michalsky(michalsky_lnI_filter2)
• log(irradiance) for the Direct Narrowband Filter4, Barnard(barnard_lnI_filter4)
• log(irradiance) for the Direct Narrowband Filter5, Barnard(barnard_lnI_filter5)
• rejected points for the final fit for the Direct Narrowband Filter4, Michalsky(michalsky_rejected_filter4)
• log(irradiance) for the Direct Narrowband Filter6, Barnard(barnard_lnI_filter6)
• rejected points for the final fit for the Direct Narrowband Filter2, Michalsky(michalsky_rejected_filter2)
• rejected points for the final fit for the Direct Narrowband Filter1, Michalsky(michalsky_rejected_filter1)
• airmass(barnard_airmass)
• log(irradiance) for the Direct Narrowband Filter1, Michalsky(michalsky_lnI_filter1)
• rejected points for the final fit for the Direct Narrowband Filter1, Barnard(barnard_rejected_filter1)
• lon(lon)
• log(irradiance) for the Direct Narrowband Filter6, Michalsky(michalsky_lnI_filter6)
• rejected points for the final fit for the Direct Narrowband Filter5, Michalsky(michalsky_rejected_filter5)
• Dummy altitude for Zeb(alt)
• rejected points for the final fit for the Direct Narrowband Filter6, Michalsky(michalsky_rejected_filter6)
• rejected points for the final fit for the Direct Narrowband Filter3, Barnard(barnard_rejected_filter3)
• log(irradiance) for the Direct Broadband, Barnard(barnard_lnI_broadband)
• log(irradiance) for the Direct Narrowband Filter3, Michalsky(michalsky_lnI_filter3)
• rejected points for the final fit for the Direct Narrowband Filter4, Barnard(barnard_rejected_filter4)
• log(irradiance) for the Direct Narrowband Filter4, Michalsky(michalsky_lnI_filter4)
• log(irradiance) for the Direct Narrowband Filter5, Michalsky(michalsky_lnI_filter5)
• rejected points for the final fit for the Direct Narrowband Filter5, Barnard(barnard_rejected_filter5)
• log(irradiance) for the Direct Narrowband Filter1, Barnard(barnard_lnI_filter1)
• rejected points for the final fit for the Direct Broadband, Barnard(barnard_rejected_broadband)
• rejected points for the final fit for the Direct Narrowband Filter6, Barnard(barnard_rejected_filter6)
• log(irradiance) for the Direct Narrowband Filter3, Barnard(barnard_lnI_filter3)
• log(irradiance) for the Direct Narrowband Filter2, Barnard(barnard_lnI_filter2)
• rejected points for the final fit for the Direct Narrowband Filter2, Barnard(barnard_rejected_filter2)
• time(time)
• lat(lat)
• base time(base_time)
• airmass(michalsky_airmass)
• rejected points for the final fit for the Direct Broadband, Michalsky(michalsky_rejected_broadband)
• log(irradiance) for the Direct Broadband, Michalsky(michalsky_lnI_broadband)

• Langley regression Io, Michalsky, Direct Narrowband Filter5(michalsky_solar_constant_filter5)
• optical depth for the Direct BroadBand(michalsky_optical_depth_broadband)
• solar constant corrected for solar distance for the Direct Broadband(michalsky_solar_constant_sdist_broadband)
• rejection flag for Direct Narrowband Filter6(barnard_badflag_filter6)
• rejection flag for Direct Broadband(michalsky_badflag_broadband)
• Angstrom exponent(barnard_angstrom_exponent)
• Average atmospheric pressure used for Rayleigh calculations(atmospheric_pressure)
• lon(lon)
• rejection flag for Direct Narrowband Filter5(barnard_badflag_filter5)
• Langley regression Io, Michalsky, Direct BroadBand(michalsky_solar_constant_broadband)
• solar constant corrected for solar distance for the Direct Narrowband Filter3(michalsky_solar_constant_sdist_filter3)
• Dummy altitude for Zeb(alt)
• solar constant corrected for solar distance for the Direct Narrowband Filter5(michalsky_solar_constant_sdist_filter5)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter1(barnard_error_slope_filter1)
• Langley regression Io, Michalsky, Direct Narrowband Filter6(michalsky_solar_constant_filter6)
• solar constant corrected for solar distance for the Direct Narrowband Filter2(michalsky_solar_constant_sdist_filter2)
• solar constant corrected for solar distance for the Direct Narrowband Filter4(michalsky_solar_constant_sdist_filter4)
• solar constant corrected for solar distance for the Direct Narrowband Filter1(michalsky_solar_constant_sdist_filter1)
• number of points used in final linear fit for the Direct Narrowband Filter1(barnard_number_points_filter1)
• rejection flag for Direct Narrowband Filter6(michalsky_badflag_filter6)
• rejection flag for Direct Narrowband Filter5(michalsky_badflag_filter5)
• Langley regression Io, Michalsky, Direct Narrowband Filter2(michalsky_solar_constant_filter2)
• Langley regression Io, Michalsky, Direct Narrowband Filter3(michalsky_solar_constant_filter3)
• time(time)
• rejection flag for Direct Narrowband Filter4(michalsky_badflag_filter4)
• error in final linear fit for the Direct Narrowband Filter6(barnard_error_fit_filter6)
• solar constant corrected for solar distance for the Direct Narrowband Filter6(michalsky_solar_constant_sdist_filter6)
• Barnard computed sun to earth distance(barnard_sun_earth_distance)
• rejection flag for Direct Narrowband Filter3(michalsky_badflag_filter3)
• Langley regression Io, Michalsky, Direct Narrowband Filter4(michalsky_solar_constant_filter4)
• rejection flag for Direct Narrowband Filter3(barnard_badflag_filter3)
• rejection flag for Direct Narrowband Filter2(barnard_badflag_filter2)
• rejection flag for Direct Narrowband Filter1(barnard_badflag_filter1)
• rejection flag for Direct Narrowband Filter4(barnard_badflag_filter4)
• standard deviation around regression line for the Direct BroadBand(michalsky_standard_deviation_broadband)
• optical depth for the Direct Narrowband Filter2(barnard_optical_depth_filter2)
• number of points used in final linear fit for the Direct Narrowband Filter3(michalsky_number_points_filter3)
• Langley regression Io, adjusted to 1AU, Barnard, Direct Narrowband Filter5(barnard_solar_constant_sdist_filter5)
• error in final linear fit for the Direct Narrowband Filter2(barnard_error_fit_filter2)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter2(barnard_error_slope_filter2)
• optical depth for the Direct Narrowband Filter3(michalsky_optical_depth_filter3)
• number of points used in final linear fit for the Direct Narrowband Filter2(barnard_number_points_filter2)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter6(michalsky_good_fraction_filter6)
• Langley regression Io, adjusted to 1AU, Barnard, Direct Narrowband Filter4(barnard_solar_constant_sdist_filter4)
• error in final linear fit for the Direct Narrowband Filter1(barnard_error_fit_filter1)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter3(michalsky_good_fraction_filter3)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter3(barnard_error_slope_filter3)
• rejection flag for Direct Narrowband Filter1(michalsky_badflag_filter1)
• optical depth for the Direct Narrowband Filter2(michalsky_optical_depth_filter2)
• Time offset of tweaks from base_time(time_offset)
• standard deviation around regression line for the Direct Narrowband Filter6(michalsky_standard_deviation_filter6)
• optical depth for the Direct Narrowband Filter5(michalsky_optical_depth_filter5)
• percentage of initial points used in final linear fit for the Direct Broadband(barnard_good_fraction_broadband)
• Michalsky computed sun to earth distance(michalsky_sun_earth_distance)
• error in optical depth (slope) of final linear fit for the Direct Broadband(barnard_error_slope_broadband)
• Langley regression Io, adjusted to 1AU, Barnard, Direct Narrowband Filter2(barnard_solar_constant_sdist_filter2)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter6(barnard_error_slope_filter6)
• optical depth for the Direct Narrowband Filter4(barnard_optical_depth_filter4)
• rejection flag for Direct Broadband(barnard_badflag_broadband)
• optical depth for the Direct Narrowband Filter4(michalsky_optical_depth_filter4)
• Langley regression Io, adjusted to 1AU, Barnard, Direct Narrowband Filter3(barnard_solar_constant_sdist_filter3)
• optical depth for the Direct Narrowband Filter5(barnard_optical_depth_filter5)
• optical depth for the Direct Narrowband Filter6(michalsky_optical_depth_filter6)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter5(michalsky_good_fraction_filter5)
• standard deviation around regression line for the Direct Narrowband Filter5(michalsky_standard_deviation_filter5)
• number of points used in final linear fit for the Direct Narrowband Filter3(barnard_number_points_filter3)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter4(barnard_good_fraction_filter4)
• standard deviation around regression line for the Direct Narrowband Filter2(michalsky_standard_deviation_filter2)
• standard deviation around regression line for the Direct Narrowband Filter3(michalsky_standard_deviation_filter3)
• number of points used in final linear fit for the Direct Broadband(barnard_number_points_broadband)
• error in final linear fit for the Direct Narrowband Filter4(barnard_error_fit_filter4)
• percentage of initial points used in final linear fit for the Direct Broadband(michalsky_good_fraction_broadband)
• optical depth for the Direct BroadBand(barnard_optical_depth_broadband)
• standard deviation around regression line for the Direct Narrowband Filter4(michalsky_standard_deviation_filter4)
• solar constant corrected for solar distance for the Direct Narrowband Filter6(barnard_solar_constant_sdist_filter6)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter1(barnard_good_fraction_filter1)
• standard deviation around regression line for the Direct Narrowband Filter1(michalsky_standard_deviation_filter1)
• optical depth for the Direct Narrowband Filter6(barnard_optical_depth_filter6)
• rejection flag for Direct Narrowband Filter2(michalsky_badflag_filter2)
• error in final linear fit for the Direct BroadBand(barnard_error_fit_broadband)
• optical depth for the Direct Narrowband Filter1(michalsky_optical_depth_filter1)
• optical depth for the Direct Narrowband Filter1(barnard_optical_depth_filter1)
• error in final linear fit for the Direct Narrowband Filter5(barnard_error_fit_filter5)
• number of points used in final linear fit for the Direct Broadband(michalsky_number_points_broadband)
• error in final linear fit for the Direct Narrowband Filter3(barnard_error_fit_filter3)
• number of points used in final linear fit for the Direct Narrowband Filter5(barnard_number_points_filter5)
• base time(base_time)
• number of points used in final linear fit for the Direct Narrowband Filter6(barnard_number_points_filter6)
• number of points used in final linear fit for the Direct Narrowband Filter4(barnard_number_points_filter4)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter5(barnard_good_fraction_filter5)
• Langley regression Io, Michalsky, Direct Narrowband Filter1(michalsky_solar_constant_filter1)
• lat(lat)
• number of points used in final linear fit for the Direct Narrowband Filter1(michalsky_number_points_filter1)
• number of points used in final linear fit for the Direct Narrowband Filter2(michalsky_number_points_filter2)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter3(barnard_good_fraction_filter3)
• Angstrom exponent(michalsky_angstrom_exponent)
• Langley regression Io, adjusted to 1AU, Barnard, Direct BroadBand(barnard_solar_constant_sdist_broadband)
• number of points used in final linear fit for the Direct Narrowband Filter4(michalsky_number_points_filter4)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter2(barnard_good_fraction_filter2)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter1(michalsky_good_fraction_filter1)
• number of points used in final linear fit for the Direct Narrowband Filter5(michalsky_number_points_filter5)
• Langley regression Io, adjusted to 1AU, Barnard, Direct Narrowband Filter1(barnard_solar_constant_sdist_filter1)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter4(michalsky_good_fraction_filter4)
• optical depth for the Direct Narrowband Filter3(barnard_optical_depth_filter3)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter5(barnard_error_slope_filter5)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter6(barnard_good_fraction_filter6)
• number of points used in final linear fit for the Direct Narrowband Filter6(michalsky_number_points_filter6)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter4(barnard_error_slope_filter4)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter2(michalsky_good_fraction_filter2)

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

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

SGP/MFRSR/E13 - Shadowband misalignment

The E13 MFRSR developed a shading problem on or about 05/04.  (The exact date when this 
problem started is difficult to pin down exactly.) The shading problem is easy to identify 
on a clear day because plots of direct beam and diffuse irradiance versus time become 
"fuzzy".  The total irradiance is not affected.
  

In response to the shading problem, a whole sequence of events then ensued: these actions 
were designed to solve the shading problem but did not succeed until the very end.

Here's a rundown of what took place:

98/05/11 - shadowband adjustment was made at 1544 GMT
         - this adjustment corrected the shading problem that 
           occurred in the morning, but inadvertently caused
           a PM shading problem 
98/05/20 - shadowband adjustment at 1804 GMT
98/05/21 - shadowband adjustment at 1630 GMT
98/06/01 - shadowband adjustment at 1910 GMT
98/06/02 - shadowband adjustmnet at 1550 GMT

Alas, these adjustments did not solve the shading problem and
it seemed to get worse (for example, on 06/11 the shading 
is VERY BAD from sunup until about 1500 LST).

98/06/16 - shadowband adjustment at 1715 GMT

This final adjustment seems to a solved the problem!

• Narrowband Direct Horizontal Irradiance, Filter 5(direct_horizontal_narrowband_filter5)
• Narrowband Diffuse Hemispheric Irradiance, Filter 6(diffuse_hemisp_narrowband_filter6)
• Direct Normal Broadband Irradiance broadband scale applied(direct_normal_broadband)
• Narrowband Direct Horizontal Irradiance, Filter 6(direct_horizontal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 5(direct_normal_narrowband_filter5)
• Narrowband Diffuse Hemispheric Irradiance, Filter 3(diffuse_hemisp_narrowband_filter3)
• Narrowband Diffuse Hemispheric Irradiance, Filter 4(diffuse_hemisp_narrowband_filter4)
• Narrowband Diffuse Hemispheric Irradiance, Filter 5(diffuse_hemisp_narrowband_filter5)
• Direct Normal Narrowband Irradiance, Filter 3(direct_normal_narrowband_filter3)
• Direct Normal Narrowband Irradiance, Filter 2(direct_normal_narrowband_filter2)
• Direct Normal Narrowband Irradiance, Filter 1(direct_normal_narrowband_filter1)
• Narrowband Direct Horizontal Irradiance, Filter 3(direct_horizontal_narrowband_filter3)
• Direct Normal Narrowband Irradiance, Filter 6(direct_normal_narrowband_filter6)
• Direct Normal Narrowband Irradiance, Filter 4(direct_normal_narrowband_filter4)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Narrowband Diffuse Hemispheric Irradiance, Filter 2(diffuse_hemisp_narrowband_filter2)
• Narrowband Direct Horizontal Irradiance, Filter 2(direct_horizontal_narrowband_filter2)
• Narrowband Diffuse Hemispheric Irradiance, Filter 1(diffuse_hemisp_narrowband_filter1)
• Narrowband Direct Horizontal Irradiance, Filter 4(direct_horizontal_narrowband_filter4)
• Narrowband Direct Horizontal Irradiance, Filter 1(direct_horizontal_narrowband_filter1)
• Direct Horizontal Broadband Irradiance, broadband scale applied(direct_horizontal_broadband)

• Direct Horizontal Broadband Irradiance, broadband scale applied(direct_horizontal_broadband)
• Narrowband Diffuse Hemispheric Irradiance, Filter 4(diffuse_hemisp_narrowband_filter4)
• Narrowband Diffuse Hemispheric Irradiance, Filter 5(diffuse_hemisp_narrowband_filter5)
• Narrowband Diffuse Hemispheric Irradiance, Filter 6(diffuse_hemisp_narrowband_filter6)
• Narrowband Direct Horizontal Irradiance, Filter 6(direct_horizontal_narrowband_filter6)
• Narrowband Direct Horizontal Irradiance, Filter 4(direct_horizontal_narrowband_filter4)
• Narrowband Direct Horizontal Irradiance, Filter 2(direct_horizontal_narrowband_filter2)
• Narrowband Direct Horizontal Irradiance, Filter 5(direct_horizontal_narrowband_filter5)
• Narrowband Diffuse Hemispheric Irradiance, Filter 3(diffuse_hemisp_narrowband_filter3)
• Narrowband Diffuse Hemispheric Irradiance, Filter 2(diffuse_hemisp_narrowband_filter2)
• Narrowband Direct Horizontal Irradiance, Filter 1(direct_horizontal_narrowband_filter1)
• Narrowband Diffuse Hemispheric Irradiance, Filter 1(diffuse_hemisp_narrowband_filter1)
• Diffuse Hemispheric Broadband Irradiance (Approximate), MFRSR(diffuse_hemisp_broadband)
• Narrowband Direct Horizontal Irradiance, Filter 3(direct_horizontal_narrowband_filter3)

• rejected points for the final fit for the Direct Narrowband Filter1, Michalsky(michalsky_rejected_filter1)
• rejected points for the final fit for the Direct Broadband, Barnard(barnard_rejected_broadband)
• log(irradiance) for the Direct Narrowband Filter6, Barnard(barnard_lnI_filter6)
• log(irradiance) for the Direct Broadband, Barnard(barnard_lnI_broadband)
• rejected points for the final fit for the Direct Narrowband Filter6, Barnard(barnard_rejected_filter6)
• log(irradiance) for the Direct Narrowband Filter2, Barnard(barnard_lnI_filter2)
• log(irradiance) for the Direct Narrowband Filter1, Michalsky(michalsky_lnI_filter1)
• log(irradiance) for the Direct Narrowband Filter3, Barnard(barnard_lnI_filter3)
• log(irradiance) for the Direct Narrowband Filter5, Barnard(barnard_lnI_filter5)
• log(irradiance) for the Direct Narrowband Filter3, Michalsky(michalsky_lnI_filter3)
• rejected points for the final fit for the Direct Narrowband Filter2, Barnard(barnard_rejected_filter2)
• log(irradiance) for the Direct Broadband, Michalsky(michalsky_lnI_broadband)
• log(irradiance) for the Direct Narrowband Filter4, Barnard(barnard_lnI_filter4)
• log(irradiance) for the Direct Narrowband Filter4, Michalsky(michalsky_lnI_filter4)
• log(irradiance) for the Direct Narrowband Filter6, Michalsky(michalsky_lnI_filter6)
• rejected points for the final fit for the Direct Narrowband Filter3, Barnard(barnard_rejected_filter3)
• rejected points for the final fit for the Direct Narrowband Filter4, Barnard(barnard_rejected_filter4)
• rejected points for the final fit for the Direct Narrowband Filter1, Barnard(barnard_rejected_filter1)
• log(irradiance) for the Direct Narrowband Filter2, Michalsky(michalsky_lnI_filter2)
• rejected points for the final fit for the Direct Narrowband Filter5, Michalsky(michalsky_rejected_filter5)
• log(irradiance) for the Direct Narrowband Filter1, Barnard(barnard_lnI_filter1)
• rejected points for the final fit for the Direct Narrowband Filter6, Michalsky(michalsky_rejected_filter6)
• rejected points for the final fit for the Direct Narrowband Filter5, Barnard(barnard_rejected_filter5)
• log(irradiance) for the Direct Narrowband Filter5, Michalsky(michalsky_lnI_filter5)
• rejected points for the final fit for the Direct Narrowband Filter2, Michalsky(michalsky_rejected_filter2)
• rejected points for the final fit for the Direct Narrowband Filter4, Michalsky(michalsky_rejected_filter4)
• rejected points for the final fit for the Direct Broadband, Michalsky(michalsky_rejected_broadband)
• rejected points for the final fit for the Direct Narrowband Filter3, Michalsky(michalsky_rejected_filter3)

• number of points used in final linear fit for the Direct Broadband(michalsky_number_points_broadband)
• rejection flag for Direct Narrowband Filter4(michalsky_badflag_filter4)
• standard deviation around regression line for the Direct Narrowband Filter4(michalsky_standard_deviation_filter4)
• rejection flag for Direct Narrowband Filter1(michalsky_badflag_filter1)
• error in final linear fit for the Direct Narrowband Filter4(barnard_error_fit_filter4)
• standard deviation around regression line for the Direct Narrowband Filter5(michalsky_standard_deviation_filter5)
• number of points used in final linear fit for the Direct Narrowband Filter1(michalsky_number_points_filter1)
• rejection flag for Direct Narrowband Filter6(barnard_badflag_filter6)
• standard deviation around regression line for the Direct Narrowband Filter3(michalsky_standard_deviation_filter3)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter1(barnard_good_fraction_filter1)
• optical depth for the Direct Narrowband Filter4(barnard_optical_depth_filter4)
• percentage of initial points used in final linear fit for the Direct Broadband(barnard_good_fraction_broadband)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter1(michalsky_good_fraction_filter1)
• rejection flag for Direct Narrowband Filter5(barnard_badflag_filter5)
• rejection flag for Direct Narrowband Filter5(michalsky_badflag_filter5)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter3(barnard_good_fraction_filter3)
• standard deviation around regression line for the Direct Narrowband Filter2(michalsky_standard_deviation_filter2)
• number of points used in final linear fit for the Direct Narrowband Filter6(michalsky_number_points_filter6)
• number of points used in final linear fit for the Direct Narrowband Filter3(barnard_number_points_filter3)
• rejection flag for Direct Broadband(barnard_badflag_broadband)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter5(barnard_good_fraction_filter5)
• optical depth for the Direct Narrowband Filter6(barnard_optical_depth_filter6)
• error in final linear fit for the Direct Narrowband Filter5(barnard_error_fit_filter5)
• number of points used in final linear fit for the Direct Narrowband Filter3(michalsky_number_points_filter3)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter3(michalsky_good_fraction_filter3)
• number of points used in final linear fit for the Direct Broadband(barnard_number_points_broadband)
• optical depth for the Direct Narrowband Filter3(michalsky_optical_depth_filter3)
• number of points used in final linear fit for the Direct Narrowband Filter2(michalsky_number_points_filter2)
• rejection flag for Direct Narrowband Filter1(barnard_badflag_filter1)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter2(michalsky_good_fraction_filter2)
• error in final linear fit for the Direct Narrowband Filter6(barnard_error_fit_filter6)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter4(barnard_error_slope_filter4)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter2(barnard_good_fraction_filter2)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter6(michalsky_good_fraction_filter6)
• percentage of initial points used in final linear fit for the Direct Broadband(michalsky_good_fraction_broadband)
• optical depth for the Direct BroadBand(michalsky_optical_depth_broadband)
• optical depth for the Direct Narrowband Filter2(michalsky_optical_depth_filter2)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter4(michalsky_good_fraction_filter4)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter6(barnard_error_slope_filter6)
• optical depth for the Direct Narrowband Filter4(michalsky_optical_depth_filter4)
• rejection flag for Direct Narrowband Filter6(michalsky_badflag_filter6)
• number of points used in final linear fit for the Direct Narrowband Filter5(barnard_number_points_filter5)
• optical depth for the Direct Narrowband Filter5(barnard_optical_depth_filter5)
• number of points used in final linear fit for the Direct Narrowband Filter6(barnard_number_points_filter6)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter6(barnard_good_fraction_filter6)
• optical depth for the Direct Narrowband Filter1(michalsky_optical_depth_filter1)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter2(barnard_error_slope_filter2)
• optical depth for the Direct Narrowband Filter6(michalsky_optical_depth_filter6)
• error in final linear fit for the Direct BroadBand(barnard_error_fit_broadband)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter5(michalsky_good_fraction_filter5)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter4(barnard_good_fraction_filter4)
• standard deviation around regression line for the Direct Narrowband Filter6(michalsky_standard_deviation_filter6)
• number of points used in final linear fit for the Direct Narrowband Filter4(michalsky_number_points_filter4)
• rejection flag for Direct Narrowband Filter3(michalsky_badflag_filter3)
• Angstrom exponent(michalsky_angstrom_exponent)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter5(barnard_error_slope_filter5)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter3(barnard_error_slope_filter3)
• rejection flag for Direct Narrowband Filter2(barnard_badflag_filter2)
• rejection flag for Direct Broadband(michalsky_badflag_broadband)
• error in final linear fit for the Direct Narrowband Filter2(barnard_error_fit_filter2)
• optical depth for the Direct Narrowband Filter1(barnard_optical_depth_filter1)
• number of points used in final linear fit for the Direct Narrowband Filter4(barnard_number_points_filter4)
• Angstrom exponent(barnard_angstrom_exponent)
• standard deviation around regression line for the Direct BroadBand(michalsky_standard_deviation_broadband)
• number of points used in final linear fit for the Direct Narrowband Filter1(barnard_number_points_filter1)
• optical depth for the Direct Narrowband Filter2(barnard_optical_depth_filter2)
• rejection flag for Direct Narrowband Filter2(michalsky_badflag_filter2)
• error in final linear fit for the Direct Narrowband Filter3(barnard_error_fit_filter3)
• number of points used in final linear fit for the Direct Narrowband Filter5(michalsky_number_points_filter5)
• rejection flag for Direct Narrowband Filter3(barnard_badflag_filter3)
• error in optical depth (slope) of final linear fit for the Direct Broadband(barnard_error_slope_broadband)
• optical depth for the Direct BroadBand(barnard_optical_depth_broadband)
• rejection flag for Direct Narrowband Filter4(barnard_badflag_filter4)
• standard deviation around regression line for the Direct Narrowband Filter1(michalsky_standard_deviation_filter1)
• error in final linear fit for the Direct Narrowband Filter1(barnard_error_fit_filter1)
• optical depth for the Direct Narrowband Filter5(michalsky_optical_depth_filter5)
• number of points used in final linear fit for the Direct Narrowband Filter2(barnard_number_points_filter2)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter1(barnard_error_slope_filter1)
• optical depth for the Direct Narrowband Filter3(barnard_optical_depth_filter3)