SGP/MPL/C1 - Reduced detection sensitivity

During the time periods indicated, the laser power supply was low.  This resulted in 
compromised detection sensitivity, particularly for thin clouds and/or during daylight hours.  
That is, some clouds may not have been identified.  The low laser power would not have 
resulted in false positives.

• Preliminary cloud base height above ground level(preliminary_cbh)

• MPL Cloth et al. Algorithm Significance Mask(SigniMaskMplCloth)

• MPL Clothiaux et al. Algorithm Cloud Mask Occurrence(CloudMaskMplCloth)

• Cloud mask(cloud_mask_2)
• Flag indicating whether the beam was extinguished at indicated cloud top(cloud_top_attenuation_flag)
• Cloud mask(cloud_mask_1)
• Cloud base height (for first cloud above height threshold)(cloud_base_height)
• Cloud top height (for highest cloud sensed)(cloud_top_height)

SGP/MPL/C1 - Instrument offline

Instrument was taken offline due to a failure of the laser power supply.  Data are missing 
and unrecoverable.

• Time offset from base_time(base_time)
• Preliminary cloud base height above ground level(preliminary_cbh)
• Maximum altitude retrieved from multichannel scalar card.(max_altitude)
• Time offset of tweaks from base_time(time_offset)
• Detector temperature(detector_temp)
• Repetition rate, or Trigger Frequency of the laser(trigger_freq)
• north latitude for all the input platforms.(lat)
• distance to center of range bin after correcting for offset in sync(range)
• Number of laser pulses summed during measurement interval(shots_summed)
• value represents date when configuration is first applicable as YYYYMMDD(property)
• Background signal(background_signal)
• Aerosol volume backscattering coefficient at 355 nm(backscatter)
• Amount of time the actual laser pulse lags behind the sync trigger(laser_sync_offset)
• Voltage level which operates the thermistor(voltage_10)
• Height of bins above ground level for the temperature, retrieved water vapor,
  and pressure profile(height)
• Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)
• Number of laser pulses summed during measurement interval(shots_sum)
• Amount of time the scalar lags behind the sync trigger(scalar_sync_offset)
• Laser temperature(laser_temp)
• Angle of inclination with respect to horizontal(transceiver_altitude_angle)
• Distance from leading edge of first range bin to the center of each bin.(range_bins)
• effective range offset due to poor sync between laser firing and A/D trigger.(range_offset)
• Repetition rate, or Trigger Frequency of the laser(pulse_rep)
• Angle of orientation with respect to true geographic north(transceiver_azimuth_angle)
• Energy output per pulse of transmitted laser beam at 523 nm (Doubled Nd-YLF)(energy_monitor)
• Instrument temperature(instrument_temp)
• Amount of time laser pulse lags behind the scalar trigger(laser_scalar_sync_offset)
• altitude above sea levelaltunits(alt)
• Width of range-bins calculated from range_bin_time(range_bin_width)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• required to correct raw counts for detector deadtime prior to all other
  corrections.(deadtime_correction)
• Voltage level which operates the energy monitor(voltage_15)
• Sum of raw backscatter counts per bin prior to ANY corrections.(total_counts)
• Filter temperature(filter_temp)
• Voltage level which operates the A/D card and the detector(voltage_05)
• east longitude for all the input platforms.(lon)

• Time offset from base_time(base_time)
• Range Heights (center of radar sample volume)(Heights)
• MPL Cloth et al. Algorithm Significance Mask(SigniMaskMplCloth)
• Time offset of tweaks from base_time(time_offset)

• Time offset from base_time(base_time)
• MPL Clothiaux et al. Algorithm Cloud Mask Occurrence(CloudMaskMplCloth)
• Time offset of tweaks from base_time(time_offset)
• Range Heights (center of radar sample volume)(Heights)

• Background signal(background_signal)
• Instrument temperature(instrument_temp)
• Time offset of tweaks from base_time(time_offset)
• Cloud base height (for first cloud above height threshold)(cloud_base_height)
• Energy output per pulse of transmitted laser beam at 523 nm (Doubled Nd-YLF)(energy_monitor)
• north latitude for all the input platforms.(lat)
• Cloud mask(cloud_mask_2)
• Height of bins above ground level for the temperature, retrieved water vapor,
  and pressure profile(height)
• Number of laser pulses summed during measurement interval(shots_summed)
• Repetition rate, or Trigger Frequency of the laser(pulse_rep)
• The update time of the historical baseline used for the cloud boundary
  determination of this sample(baseline_update_time)
• Cloud top height (for highest cloud sensed)(cloud_top_height)
• Aerosol volume backscattering coefficient at 355 nm(backscatter)
• Flag indicating whether the beam was extinguished at indicated cloud top(cloud_top_attenuation_flag)
• Detector temperature(detector_temp)
• Laser temperature(laser_temp)
• Cloud mask(cloud_mask_1)
• east longitude for all the input platforms.(lon)
• Time offset from base_time(base_time)
• Relative random error in backscatter profiles(random_error)
• altitude above sea levelaltunits(alt)