MAG/PRP/M1 - FRSR head temperature error

During the time specified (Leg2) the MFR head temperature sensor was failing 
intermittently. At times when the head_temp falls outside the normal range of 38 C to 42 C, the heater 
likely was not maintaining proper operating temperature, and the radiometric calibration 
is invalid. 

The FRSR head was replaced for Leg 3 and beyond.

null

• No-shadow record, standard deviation of the mean signal from the filter4 channel
  when no shadow is detected(signal_narrowband_filter4_std)
• Shadow record, mean sweep measurements, broadband channel(sweeps_hemisp_broadband)
• Shadowband sweep measurements, filter 6, nominal wavelength is 935 nm(sweeps_hemisp_narrowband_filter6)
• Shadowband sweep measurements, filter 5, nominal wavelength is 860 nm(sweeps_hemisp_narrowband_filter5)
• Shadow record, mean sweep measurements, filter 4, nominal wavelength is 660 nm(sweeps_hemisp_narrowband_filter4)
• Shadowband sweep measurements, filter 3, nominal wavelength is 608 nm(sweeps_hemisp_narrowband_filter3)
• Shadowband sweep measurements, filter 2, nominal wavelength is 500 nm(sweeps_hemisp_narrowband_filter2)
• Shadow record, mean sweep measurements, filter 1, nominal wavelength is 415 nm(sweeps_hemisp_narrowband_filter1)
• No-shadow record, standard deviation of the mean signal from the filter5 channel
  when no shadow is detected(signal_narrowband_filter5_std)
• No-shadow record, standard deviation of the mean signal from the filter3 channel
  when no shadow is detected(signal_narrowband_filter3_std)
• Shadow record, mean narrowband hemispheric irradiance at start of sweep, filter
  3, nominal wavelength is 608 nm(start_sweep_hemisp_narrowband_filter3)
• Shadow record, mean narrowband hemispheric irradiance at start of sweep, filter
  4, nominal wavelength is 660 nm(start_sweep_hemisp_narrowband_filter4)
• Narrowband hemispheric irradiance, at start of shadowband sweep, filter 5,
  nominal wavelength is 860 nm(start_sweep_hemisp_narrowband_filter5)
• Shadow record, mean narrowband hemispheric irradiance at start of sweep, filter
  6, nominal wavelength is 935 nm(start_sweep_hemisp_narrowband_filter6)
• Detector temperature(head_temp)
• Shadow record, standard deviation of accepted shadow ratios(shadow_ratio_std)
• No-shadow record, standard deviation of the mean signal from the broadband
  channel when no shadow is detected(signal_broadband_std)
• Shadow record, mean narrowband hemispheric irradiance at start of sweep, filter
  1, nominal wavelength is 415 nm(start_sweep_hemisp_narrowband_filter1)
• Narrowband hemispheric irradiance, at start of shadowband sweep, filter 2,
  nominal wavelength is 500 nm(start_sweep_hemisp_narrowband_filter2)
• No-shadow record, standard deviation of the mean signal from the filter6 channel
  when no shadow is detected(signal_narrowband_filter6_std)
• Mean global, selected channel(mean_global)
• No-shadow record, standard deviation of the mean signal from the filter2 channel
  when no shadow is detected(signal_narrowband_filter2_std)
• Narrowband hemispheric irradiance, at end of shadowband sweep, filter 1, nominal
  wavelength is 415 nm(end_sweep_hemisp_narrowband_filter1)
• Narrowband hemispheric irradiance, at end of shadowband sweep, filter 5, nominal
  wavelength is 860 nm(end_sweep_hemisp_narrowband_filter5)
• Shadow record, mean narrowband hemispheric irradiance at end of sweep, filter 4,
  nominal wavelength is 660 nm(end_sweep_hemisp_narrowband_filter4)
• Narrowband hemispheric irradiance, at end of shadowband sweep, filter 3,
  nominal wavelength is 608 nm(end_sweep_hemisp_narrowband_filter3)
• Shadow record, mean narrowband hemispheric irradiance at end of sweep, filter 2,
  nominal wavelength is 500 nm(end_sweep_hemisp_narrowband_filter2)
• No-shadow record, standard deviation of the mean signal from the filter1 channel
  when no shadow is detected(signal_narrowband_filter1_std)
• Narrowband hemispheric irradiance, at end of shadowband sweep, filter 6, nominal
  wavelength is 935 nm(end_sweep_hemisp_narrowband_filter6)
• No-shadow record. mean signal from the filter2 channel when no shadow is
  detected(signal_narrowband_filter2)
• No-shadow record, mean signal from the filter1 channel when no shadow is
  detected(signal_narrowband_filter1)
• No-shadow record, mean signal from the filter4 channel when no shadow is
  detected(signal_narrowband_filter4)
• No-shadow record, mean signal from the filter3 channel when no shadow is
  detected(signal_narrowband_filter3)
• No-shadow record, mean signal from the filter6 channel when no shadow is
  detected(signal_narrowband_filter6)
• No-shadow record, mean signal from the broadband channel when no shadow is
  detected(signal_broadband)
• No-shadow record, mean signal from the filter5 channel when no shadow is
  detected(signal_narrowband_filter5)
• Hemispheric broadband irradiance, at start of shadowband sweep, broadband
  channel(start_sweep_hemisp_broadband)
• Shadow record, mean shadow ratio for all accepted sweeps in average period(shadow_ratio)
• Hemispheric broadband irradiance, at end of shadowband sweep, broadband channel(end_sweep_hemisp_broadband)