Data Quality Reports for Session: 106085 User: gaun Completed: 06/15/2007

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060629.1TWP/MMCR/C3 - Reprocess: Reflectivity Calibration ProblemstwpmmcrmomC3.b1, twpmmcrspecmomC3.a0
D070112.3TWP/MMCR/C3 - Reprocess: Height ErrortwpmmcrmomC3.00, twpmmcrmomC3.b1, twpmmcrspecmomC3.a0


DQRID : D060629.1
Start DateStart TimeEnd DateEnd Time
12/02/2005000007/18/20062359
Subject:
TWP/MMCR/C3 - Reprocess: Reflectivity Calibration Problems
DataStreams:twpmmcrmomC3.b1, twpmmcrspecmomC3.a0
Description:
There was a problem with the reflectivity values being shifted 15-20 dBz less than what 
one might expect them to be.  The low noise amplifier (LNA) was damaged by lightning.  The 
LNA was replaced 20060718.
Measurements:twpmmcrspecmomC3.a0:
  • First Order Estimate of Spectral Count Calibration(CalibrationConstant)
  • Radar Constant(RadarConstant)
  • Receiver Gain(RxGain)
  • Receiver Sky Noise(SkyNoiseLevel)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • Receiver 290K Level(Rx290KLevel)
  • Receiver Cal Check Level(CalCheckLevel)
twpmmcrmomC3.b1:
  • Receiver Sky Noise(SkyNoiseLevel)
  • Receiver Cal Check Level(CalCheckLevel)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • Range Corrected Calibrated Power(RangeCorrectedPower)
  • Receiver 290K Level(Rx290KLevel)
  • MMCR Reflectivity(Reflectivity)
  • Radar Constant(RadarConstant)
  • Receiver Gain(RxGain)

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DQRID : D070112.3
Start DateStart TimeEnd DateEnd Time
11/04/2005050001/10/20072000
Subject:
TWP/MMCR/C3 - Reprocess:   Height Error
DataStreams:twpmmcrmomC3.00, twpmmcrmomC3.b1, twpmmcrspecmomC3.a0
Description:
A timing error was found in the PIRAQ MMCR's.  It resulted in recorded heights being too 
high for each radar mode by the following amounts: 
   Mode 1: 24.8756 m too high
   Mode 2: 25.6249 m too high
   Mode 3: 33.1176 m too high
   Mode 4: 33.1176 m too high
Range gate spacing was not affected.
Measurements:twpmmcrspecmomC3.a0:
  • Range Heights (center of radar sample volume)(Heights)
twpmmcrmomC3.00:
  • Raw data stream - documentation not supported(raw)
twpmmcrmomC3.b1:
  • Range Heights (center of radar sample volume)(heights)

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