OLI/MPL/M1 - Broken heater fan

MPL data is not noticeably affected by the failure of the heater fan. For the time period 
of the DQR, a comparison with ceilometer signal returns shows similar cloud base heights.

Data, especially at daytime, can potentially be used. Use ceilometer data.

• Overlap correction(overlap_correction)
• Number of laser pulses summed during averaging interval(shots_per_avg)
• Laser output energy per pulse(energy_monitor)
• Attenuated backscatter, co-pol(signal_return_co_pol)
• Number of detector channels(num_channels)
• Subtract from range_bins to yield range(range_offset)
• Background signal, cross pol data(background_signal_cross_pol)
• Polarization control voltage setting(polarization_control_voltage)
• Laboratory measured counts used to calculate the deadtime correction samples(deadtime_correction_counts)
• Number of bins stored in data block(num_bins)
• Maximum altitude retrieved from multichannel scalar card.(max_altitude)
• Polarization control enabled flag(polarization_control)
• Background signal standard deviation, cross-pol(background_signal_std_cross_pol)
• Preliminary cloud base height above ground level(preliminary_cbh)
• Detector Temperature(detector_temp)
• Deadtime correction factor(deadtime_correction)
• MCS mode register, value is either 167 or 199.(mcs_mode)
• Dead time correction flag(dead_time_corrected)
• Telescope temperature(scope_temp)
• Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)
• Distance from leading edge of first range bin to the center of each bin .(range_bins)
• Bin number of first data. Tells where pretrigger timing ends and end of region
  for background data sampling laser_fire_bin(first_data_bin)
• Heights for overlap correction(overlap_correction_heights)
• Background signal, co-pol(background_signal_co_pol)
• Height(height)
• Laser Temperature(laser_temp)
• Distance to the center of the corresponding range bin(range)
• Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
• Width of range-bins calculated from range_bin_time(range_bin_width)
• Attenuated backscatter, cross pol(signal_return_cross_pol)
• Background signal standard deviation, copol data(background_signal_std_co_pol)
• Bin number associated with zero height and time where laser transmit occurs(laser_fire_bin)

• (Raw data stream - documentation not supported)