Data Quality Reports for Session: 107488 User: roj Completed: 09/04/2007


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D051028.5TWP/MPL/C3 - Reprocess: Global metadata errortwpmplC3.a1
D060224.3TWP/MPL/C3 - Temporary laser failuretwpmplC3.00, twpmplC3.a1
D060227.1TWP/MPL/C3 - Backscatter profiles are inaccurate due to computer HD corruption.twpmplC3.00, twpmplC3.a1
D060621.1TWP/MPL/C3 - Missing data due to instrument removaltwpmplC3.00, twpmplC3.a1


DQRID : D051028.5
Start DateStart TimeEnd DateEnd Time
08/08/2002004107/22/20031447
Subject:
TWP/MPL/C3 - Reprocess: Global metadata error
DataStreams:twpmplC3.a1
Description:
During the time period specified, the global metadata attribute "averaging_int" is 
reported as 30 seconds when the value for this attribute should be 60 seconds.
Measurements:twpmplC3.a1:
  • Time offset of tweaks from base_time(time_offset)


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DQRID : D060224.3
Start DateStart TimeEnd DateEnd Time
02/20/2006060002/23/20060600
Subject:
TWP/MPL/C3 - Temporary laser failure
DataStreams:twpmplC3.00, twpmplC3.a1
Description:
No backscatter information is in the data. The backscatter data in the files during this 
time is solar background information only. 

The laser turned it's self off, reason: unknown. A power cycle of the entire system 
corrected the problem.
Measurements:twpmplC3.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

twpmplC3.a1:
  • Preliminary cloud base height(preliminary_cbh)
  • Attenuated backscatter(detector_counts)


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DQRID : D060227.1
Start DateStart TimeEnd DateEnd Time
02/24/2006060002/27/20060700
Subject:
TWP/MPL/C3 - Backscatter profiles are inaccurate due to computer HD corruption.
DataStreams:twpmplC3.00, twpmplC3.a1
Description:
The data shows a consistent cloud deck at 7.5km with what appears to be a duplication of 
the data from ground zero. The temperature and energy monitor values are also affected. 
The computer was found with multiple corruption problems. These corruptions may have cause 
the ghost data at 7.5km.  A chkdsk was performed which appears to have corrected the 
problem.
Measurements:twpmplC3.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

twpmplC3.a1:
  • Detector Temperature(detector_temp)
  • Instrument Temperature(instrument_temp)
  • Preliminary cloud base height(preliminary_cbh)
  • Attenuated backscatter(detector_counts)
  • Laser Temperature(laser_temp)
  • Background Signal(background_signal)
  • Laser output energy per pulse(energy_monitor)


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DQRID : D060621.1
Start DateStart TimeEnd DateEnd Time
07/23/2003000003/03/20050000
Subject:
TWP/MPL/C3 - Missing data due to instrument removal
DataStreams:twpmplC3.00, twpmplC3.a1
Description:
The instrument was removed from this site to replace a failed instrument at TWP-C2 Nauru.
Measurements:twpmplC3.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

twpmplC3.a1:
  • Array of heights for the range gates(height)
  • lon(lon)
  • Time offset of tweaks from base_time(time_offset)
  • Voltage level which operates the A/D card and the detector(voltage_05)
  • Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
  • Background Signal(background_signal)
  • time(time)
  • Voltage level which operates the energy monitor(voltage_15)
  • Distance from leading edge of first range bin to the center of each bin .(range_bins)
  • range(range)
  • Instrument Temperature(instrument_temp)
  • Filter Temperature(filter_temp)
  • effective range offset due to poor sync between laser firing and A/D trigger.(range_offset)
  • Assumed zero-range bin number\(assumed_zero_range_bin)
  • Voltage level which operates the thermistor(voltage_10)
  • Width of range-bins calculated from range_bin_time(range_bin_width)
  • Dummy altitude for Zeb(alt)
  • Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)
  • Laser output energy per pulse(energy_monitor)
  • Detector Temperature(detector_temp)
  • base time(base_time)
  • Number of laser shots recorded(shots_summed)
  • Preliminary cloud base height(preliminary_cbh)
  • Maximum altitude retrieved from multichannel scalar card.(max_altitude)
  • Attenuated backscatter(detector_counts)
  • Laser Temperature(laser_temp)
  • lat(lat)


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