Data Quality Reports for Session: 102151 User: wardrich Completed: 10/17/2006

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D040424.3TWP/MPL/C1 - SunShade timing problemtwpmplC1.00, twpmplC1.a1, twpmplcmask1clothC1.c1, twpmplsmask1clothC1.c1


DQRID : D040424.3
Start DateStart TimeEnd DateEnd Time
12/14/2003000002/17/20042359
Subject:
TWP/MPL/C1 - SunShade timing problem
DataStreams:twpmplC1.00, twpmplC1.a1, twpmplcmask1clothC1.c1, twpmplsmask1clothC1.c1
Description:
For an unknown reason, the sun shade was dropping for less then 10 minutes during the 
night at about 19:00 UTC between Dec 14, 2003 and Feb 17, 2004.  Data taken during that ten 
minute interval is not looking at the sky and should be considered as though it were 
missing.

This is a fairly small effect.  Data users can simply average across the interval or block 
the records as "missing".
Measurements:twpmplC1.a1:
  • Laser temperature(laser_temp)
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)
  • Filter temperature(filter_temp)
  • Background signal(background_signal)
  • Detector temperature(detector_temp)
  • altitude above sea levelaltunits(alt)
  • GPS raw data filename(filename)
  • east longitude for all the input platforms.(lon)
  • Time offset of tweaks from base_time(time_offset)
  • Voltage level which operates the A_D card and the detector(voltage_5)
  • Voltage level which operates the thermistor(voltage_10)
  • Average cloud base height used in the retrieval(cbh)
  • Number of laser pulses summed during measurement interval(shots_summed)
  • Instrument temperature(instrument_temp)
  • Repetition rate, or Trigger Frequency of the laser(pulse_rep)
  • Time offset from base_time(base_time)
  • Energy output per pulse of transmitted laser beam at 523 nm (Doubled Nd-YLF)(energy_monitor)
  • Voltage level which operates the energy monitor(voltage_15)
  • north latitude for all the input platforms.(lat)
twpmplC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
twpmplsmask1clothC1.c1:
  • 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)
twpmplcmask1clothC1.c1:
  • Time offset from base_time(base_time)
  • Time offset of tweaks from base_time(time_offset)
  • Range Heights (center of radar sample volume)(Heights)
  • MPL Clothiaux et al. Algorithm Cloud Mask Occurrence(CloudMaskMplCloth)

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