DQRID : D990224.1
Start DateStart TimeEnd DateEnd Time
11/11/1998000001/23/19992359
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Subject:
SGP/MPL - Missing data due to blown detector
DataStreams:sgpmplnor1campC1.c1, DsgpmplhrC1.00, sgpmplcbh1scottC1.c1, sgpmplC1.a1
Description:
Sometime early 11/11 the detector on the
MPL-004 blew out.  The Detector was replaced by Albert Mendoza.
The instrument was operational on Jan. 23, 1999.

Link this to P981119.2 that reported the blown detector and the
corrective action taken
Suggestions: 
Measurements:sgpmplC1.a1:
  • Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
  • Voltage level which operates the energy monitor(voltage_15)
  • Detector Temperature(detector_temp)
  • Voltage level which operates the thermistor(voltage_10)
  • Laser Temperature(laser_temp)
  • Height(height)
  • Filter Temperature(filter_temp)
  • Repetition rate, or Trigger Frequency of the laser(trigger_freq)
  • Laser output energy per pulse(energy_monitor)
  • Background signal(background_signal)
  • Deadtime correction factor(deadtime_correction)
  • Amount of time laser pulse lags behind the scalar trigger(laser_scalar_sync_offset)
  • Width of range-bins calculated from range_bin_time(range_bin_width)
  • Sum of raw backscatter counts per bin prior to ANY corrections.(total_counts)
  • Amount of time the scalar lags behind the sync trigger(scalar_sync_offset)
  • Distance from leading edge of first range bin to the center of each bin .(range_bins)
  • Angle of inclination with respect to horizontal(transceiver_altitude_angle)
  • Time offset from base_time(time_offset)
  • Maximum altitude retrieved from multichannel scalar card.(max_altitude)
  • Preliminary cloud base height above ground level(preliminary_cbh)
  • base time in epoch(base_time)
  • Number of laser pulses summed during measurement interval(shots_sum)
  • Subtract from range_bins to yield range(range_offset)
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)
  • Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)
  • lon(lon)
  • Number of lidar pulses summed(shots_summed)
  • Voltage level which operates the A/D card and the detector(voltage_05)
  • Amount of time the actual laser pulse lags behind the sync trigger(laser_sync_offset)
  • North Latitude(lat)
  • Angle of orientation with respect to true geographic north(transceiver_azimuth_angle)
  • value represents earliest applicable date as yyyymmdd(property)
  • -180.0 - +180.0(alt)
  • Distance to the center of the corresponding range bin(range)
  • time_in_seconds_since_volume_start(time)
  • Instrument Temperature(instrument_temp)
more
sgpmplnor1campC1.c1:
  • Number of lidar pulses summed(shots_summed)
  • Flag indicating whether the beam was extinguished at indicated cloud top(cloud_top_attenuation_flag)
  • Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
  • Laser output energy per pulse(energy_monitor)
  • -180.0 - +180.0(alt)
  • Detector Temperature(detector_temp)
  • Altitude of cloud top used in retrieval(cloud_top_height)
  • North Latitude(lat)
  • Laser Temperature(laser_temp)
  • lon(lon)
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)
  • base time in epoch(base_time)
  • The update time of the historical baseline used for the cloud boundary
    determination of this sample(baseline_update_time)
  • Time offset from base_time(time_offset)
  • Instrument Temperature(instrument_temp)
  • Background signal(background_signal)
  • Cloud base height (for first cloud above height threshold)(cloud_base_height)
  • Relative random error in backscatter profiles(random_error)
  • Cloud mask(cloud_mask_2)
  • Cloud mask(cloud_mask_1)
  • Height(height)
more
DsgpmplhrC1.00:
  • (Development raw data stream - documentation not supported)
more
sgpmplcbh1scottC1.c1:
  • North Latitude(lat)
  • -180.0 - +180.0(alt)
  • Time offset from base_time(time_offset)
  • Average cloud base height used in the retrieval(cbh)
  • base time in epoch(base_time)
  • lon(lon)
more

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