TWP/MPL/C2 - Sun-shade dropping during daytime

The MPL sunshade began to act erratically on 9/15/2003 dropping frequently throughout day 
and night.  To reduce data loss, the sunshade was restrained from blocking the MPL during 
the night.  Thus, cloud detection during the night is satisfactory, but daytime 
measurements are frequently interspersed with episodes of beam-block.

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

• Laser output energy per pulse(energy_monitor)
• Number of laser pulses summed during measurement interval(shots_sum)
• Time offset from base_time(time_offset)
• Laser Temperature(laser_temp)
• base time in epoch(base_time)
• Angle of inclination with respect to horizontal(transceiver_altitude_angle)
• Sum of raw backscatter counts per bin prior to ANY corrections.(total_counts)
• Amount of time the actual laser pulse lags behind the sync trigger(laser_sync_offset)
• Detector Temperature(detector_temp)
• Distance to the center of the corresponding range bin(range)
• Preliminary cloud base height above ground level(preliminary_cbh)
• Instrument Temperature(instrument_temp)
• Voltage level which operates the thermistor(voltage_10)
• -180.0 - +180.0(alt)
• Amount of time the scalar lags behind the sync trigger(scalar_sync_offset)
• Repetition rate, or Trigger Frequency of the laser(trigger_freq)
• Aerosol volume backscattering coefficient at 355 nm(backscatter)
• Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
• Voltage level which operates the energy monitor(voltage_15)
• Deadtime correction factor(deadtime_correction)
• Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)
• Amount of time laser pulse lags behind the scalar trigger(laser_scalar_sync_offset)
• Distance from leading edge of first range bin to the center of each bin .(range_bins)
• North Latitude(lat)
• Number of lidar pulses summed(shots_summed)
• Height(height)
• Background signal(background_signal)
• Subtract from range_bins to yield range(range_offset)
• Angle of orientation with respect to true geographic north(transceiver_azimuth_angle)
• Maximum altitude retrieved from multichannel scalar card.(max_altitude)
• Width of range-bins calculated from range_bin_time(range_bin_width)
• value represents earliest applicable date as yyyymmdd(property)
• Filter Temperature(filter_temp)
• lon(lon)
• time_in_seconds_since_volume_start(time)
• Voltage level which operates the A/D card and the detector(voltage_05)

• (Raw data stream - documentation not supported)

• Range Heights (center of radar sample volume)(Heights)
• MPL Cloth et al. Algorithm Cloud Mask(CloudMaskMplCloth)
• base time in epoch(base_time)
• Time offset from base_time(time_offset)