Data Quality Reports for Session: 106965 User: jzb Completed: 08/09/2007

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060511.3TWP/MMCR/C3 - Possibly corrupt netcdf filetwpmmcrspecmomC3.a0
D060629.1TWP/MMCR/C3 - Reprocess: Reflectivity Calibration ProblemstwpmmcrmomC3.b1, twpmmcrspecmomC3.a0
D070112.1TWP/MMCR/C1 - Reprocess: Height ErrortwpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0
D070112.3TWP/MMCR/C3 - Reprocess: Height ErrortwpmmcrmomC3.00, twpmmcrmomC3.b1, twpmmcrspecmomC3.a0
D070129.1TWP/MMCR/C1 - Error in recorded heightstwpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0


DQRID : D060511.3
Start DateStart TimeEnd DateEnd Time
03/31/2006020003/31/20060259
Subject:
TWP/MMCR/C3 - Possibly corrupt netcdf file
DataStreams:twpmmcrspecmomC3.a0
Description:
The file twpmmcrspecmomC3.a0.20060331.020000.cdf was potentially corrupted during storage 
at the archive. The file successfully responds to an "ncdump" command and the data look 
reasonable.  However, the file is only half the volume expected.   There are no backups 
for these data so we are unable to attempt a recovery.
Measurements:twpmmcrspecmomC3.a0:
  • First Order Estimate of Spectral Count Calibration(CalibrationConstant)
  • Elevation(Elevation)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • DC Filtering ON-OFF Status(DCFilterONOFF)
  • Radar Constant(RadarConstant)
  • Range Heights (center of radar sample volume)(Heights)
  • Operating Set for this Record(ModeNum)
  • Receiver Gain(RxGain)
  • Number of Points in FFT(NumFFT)
  • Azimuth(Azimuth)
  • Time Spacing Between Gates(GateSpacing)
  • Receiver Cal Check Time Stamp(CalCheckTime)
  • Number of Code Bits(NumCodeBits)
  • Number of Receiver(NumReceivers)
  • Data Quality Status(DataQualityStatus)
  • Inter-Pulse Period(InterPulsePeriod)
  • Pulse Width(PulseWidth)
  • Max. height of clutter removal(ClutterHeight)
  • Spectral Data(Spectra)
  • radar mode char identifier(ModeDescription)
  • Receiver Mode(ReceiverMode)
  • Number of Gate Heights(NumHeights)
  • Receiver Sky Noise(SkyNoiseLevel)
  • Delay to First Range Gate(StartGateDelay)
  • Number of Spectral Averages(NumSpectralAverages)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • Receiver 290K Level(Rx290KLevel)
  • Receiver Cal Time Stamp(RxCalTimeStamp)
  • Windowing ON-OFF Status(WindowingONOFF)
  • Current Receiver Number(ReceiverNumber)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Receiver Cal Check Level(CalCheckLevel)

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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 : D070112.1
Start DateStart TimeEnd DateEnd Time
06/16/2006030001/11/20071620
Subject:
TWP/MMCR/C1 - Reprocess: Height Error
DataStreams:twpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.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:twpmmcrmomC1.b1:
  • Range Heights (center of radar sample volume)(heights)
twpmmcrspecmomC1.a0:
  • Range Heights (center of radar sample volume)(Heights)
twpmmcrmomC1.00:
  • Raw data stream - documentation not supported(raw)

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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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DQRID : D070129.1
Start DateStart TimeEnd DateEnd Time
06/16/2006030011/28/20062359
Subject:
TWP/MMCR/C1 - Error in recorded heights
DataStreams:twpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0
Description:
An error in MMCR configuration resulted in a timing error.  This caused erroneous height 
values (too large) to be recorded in the data files.
Measurements:twpmmcrmomC1.b1:
  • Range Heights (center of radar sample volume)(heights)
twpmmcrspecmomC1.a0:
  • Range Heights (center of radar sample volume)(Heights)
twpmmcrmomC1.00:
  • Raw data stream - documentation not supported(raw)

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