SGP/MFRSR/E1 - Instrument noise, channel 673

The 673nm channel was noisy and dropping out completely at times.  When functioning it 
looked OK, but a significant portion of the data were affected.

Do not use periods when data are affected

• number of points used in final linear fit for the Direct Narrowband Filter4(michalsky_number_points_filter4)
• 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
  Filter4(barnard_good_fraction_filter4)
• optical depth for the Direct Narrowband Filter4(michalsky_optical_depth_filter4)
• Langley regression Io, adjusted to 1AU, Barnard, Direct Narrowband Filter4(barnard_solar_constant_sdist_filter4)
• optical depth for the Direct Narrowband Filter4(barnard_optical_depth_filter4)
• error in final linear fit for the Direct Narrowband Filter4(barnard_error_fit_filter4)
• Langley regression Io, Michalsky, Direct Narrowband Filter4(michalsky_solar_constant_filter4)
• rejection flag for Direct Narrowband Filter4(michalsky_badflag_filter4)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter4(michalsky_good_fraction_filter4)
• number of points used in final linear fit for the Direct Narrowband Filter4(barnard_number_points_filter4)
• rejection flag for Direct Narrowband Filter4(barnard_badflag_filter4)
• standard deviation around regression line for the Direct Narrowband Filter4(michalsky_standard_deviation_filter4)

• log(irradiance) for the Direct Narrowband Filter4, Michalsky(michalsky_lnI_filter4)
• rejected points for the final fit for the Direct Narrowband Filter4, Michalsky(michalsky_rejected_filter4)
• log(irradiance) for the Direct Narrowband Filter4(barnard_lnI_filter4)
• rejected points for the final fit for the Direct Narrowband Filter4, Barnard(barnard_rejected_filter4)

• Narrowband hemispheric irradiance, filter 4, offset and cosine corrected(hemisp_narrowband_filter4)
• Direct normal narrowband irradiance, filter 4, offset corrected(direct_normal_narrowband_filter4)
• Ratio of direct_normal_filter4 to diffuse_hemisp_filter4(direct_diffuse_ratio_filter4)
• Alltime Narrowband Hemispheric Irradiance, Filter 4(alltime_hemisp_narrowband_filter4)
• Diffuse Narrowband Hemispheric Irradiance, Filter 4(diffuse_hemisp_narrowband_filter4)
• Narrowband Direct Horizontal Irradiance, Filter 4, cosine corrected(direct_horizontal_narrowband_filter4)

• Narrowband hemispheric irradiance, filter 4, offset and cosine corrected(hemisp_narrowband_filter4)
• Diffuse narrowband hemispheric irradiance, filter 4(diffuse_hemisp_narrowband_filter4_raw)
• Narrowband hemispheric irradiance, filter 4(hemisp_narrowband_filter4_raw)
• Alltime Narrowband Hemispheric Irradiance, Filter 4(alltime_hemisp_narrowband_filter4)
• Narrowband Direct Horizontal Irradiance, Filter 4, cosine corrected(direct_horizontal_narrowband_filter4)
• Diffuse Narrowband Hemispheric Irradiance, Filter 4(diffuse_hemisp_narrowband_filter4)