Data Quality Reports for Session: 183336 User: simpfendoerferl1 Completed: 02/08/2017


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D080218.2NSA/MMCR/C1/C2 - Wrong PolarizationnsammcrmomC1.b1Incorrect
D080430.1NSA/MMCR/C1 - Reflectivities too highnsammcrmomC1.b1Incorrect
D090817.2NSA/MMCR/C1 - CUDC failurensammcrmomC1.b1Incorrect
D100125.1NSA/MMCR/C1 - Reflectivity shiftnsammcrmomC1.b1Incorrect
D100224.1NSA/MMCR/C1 - Reflectivity biasnsammcrmomC1.b1Incorrect
D100224.3NSA/MMCR/C1 - Reflectivity biasnsammcrmomC1.b1Incorrect
D100402.1NSA/MMCR/C1 - Coherent Up/Down Converter failurensammcrmomC1.b1Incorrect


DQRID : D080218.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/01/2007010002/14/20080200Incorrect
Subject:
NSA/MMCR/C1/C2 - Wrong Polarization
DataStreams:nsammcrmomC1.b1
Description:
The new antenna was mistakingly set to transmit/receive in circular polarization instead 
of linear polarization.  The result is that reflectivities are much lower than they should 
be.  Since we only measure on polarization channel, there is no way to apply a 
correction to go from circular to linear polarization.
Measurements:nsammcrmomC1.b1:
  • Power
  • TimeAvg
  • DataQualityStatus
  • NumFFT
  • StartGateDelay
  • ReceiverMode
  • AvgNoiseLevel
  • SkyNoiseLevel
  • NumSpectralAverages
  • RxGain
  • NoiseLevel
  • Rx290KLevel
  • SignalToNoiseRatio
  • RangeCorrectedPower
  • base_time
  • ClutterHeight
  • DCFilterONOFF
  • CalCheckTime
  • time_offset
  • RadarConstant
  • WindowingONOFF
  • East longitude(lon)
  • InterPulsePeriod
  • ModeDescription
  • North latitude(lat)
  • Altitude above mean sea level(alt)
  • RxCalTimeStamp
  • time
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • NumCodeBits
  • CalCheckLevel
  • NumReceivers
  • CircularDepolarizationRatio
  • NyquistVelocity
  • PeakTransmittedPowerAvg
  • ReceiverNumber
  • MMCR Spectral Width(SpectralWidth)
  • ModeNum
  • NumCoherentIntegrations
  • Reflectivity(Reflectivity)
  • heights
  • NumHeights
  • PulseWidth
  • MinimumDetectableReflectivity
  • GateSpacing
  • TWTStatusCode


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DQRID : D080430.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/13/2008021503/23/20112359Incorrect
Subject:
NSA/MMCR/C1 - Reflectivities too high
DataStreams:nsammcrmomC1.b1
Description:
Comparison with the Canadian NRC radar's aboard their Convair seem to indicate that the 
Barrow MMCR is reporting reflectivity approximately 10 dBZ higher than they should be.

We are currently analyzing the radar's calibration and trying to figure out where this 
offset may be coming from.  

If using reflectivity values, 10 dBZ should be subtracted.  I estimate that this should be 
accurate to within +/- 2 dBZ.  Once we find the cause and can come up with an accurate 
offset, this DQR will be revised and a request to reprocess the data will be submitted.
Measurements:nsammcrmomC1.b1:
  • Reflectivity(Reflectivity)


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DQRID : D090817.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
08/12/2009130008/17/20091615Incorrect
Subject:
NSA/MMCR/C1 - CUDC failure
DataStreams:nsammcrmomC1.b1
Description:
The Coherent Up/Down Converter's +15 vdc power supply failed.  During this time the MMCR 
was supplying erroneous data.  Instrument was taken offline.
Measurements:nsammcrmomC1.b1:
  • Power
  • TimeAvg
  • DataQualityStatus
  • NumFFT
  • StartGateDelay
  • ReceiverMode
  • AvgNoiseLevel
  • SkyNoiseLevel
  • NumSpectralAverages
  • RxGain
  • NoiseLevel
  • Rx290KLevel
  • SignalToNoiseRatio
  • RangeCorrectedPower
  • base_time
  • ClutterHeight
  • DCFilterONOFF
  • CalCheckTime
  • time_offset
  • RadarConstant
  • WindowingONOFF
  • East longitude(lon)
  • InterPulsePeriod
  • ModeDescription
  • North latitude(lat)
  • Altitude above mean sea level(alt)
  • RxCalTimeStamp
  • time
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • NumCodeBits
  • CalCheckLevel
  • NumReceivers
  • CircularDepolarizationRatio
  • NyquistVelocity
  • PeakTransmittedPowerAvg
  • ReceiverNumber
  • MMCR Spectral Width(SpectralWidth)
  • ModeNum
  • NumCoherentIntegrations
  • Reflectivity(Reflectivity)
  • heights
  • NumHeights
  • PulseWidth
  • MinimumDetectableReflectivity
  • GateSpacing
  • TWTStatusCode


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DQRID : D100125.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/10/2010000001/18/20101830Incorrect
Subject:
NSA/MMCR/C1 - Reflectivity shift
DataStreams:nsammcrmomC1.b1
Description:
A significantly high over-reporting of reflectivity occurred during this period.
Measurements:nsammcrmomC1.b1:
  • Reflectivity(Reflectivity)


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DQRID : D100224.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/10/2010000001/18/20101930Incorrect
Subject:
NSA/MMCR/C1 - Reflectivity bias
DataStreams:nsammcrmomC1.b1
Description:
The MMCR calibration was incorrect causing a very large positive shift in reflectivity 
values.
Measurements:nsammcrmomC1.b1:
  • Reflectivity(Reflectivity)


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DQRID : D100224.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/10/2010000002/23/20100230Incorrect
Subject:
NSA/MMCR/C1 - Reflectivity bias
DataStreams:nsammcrmomC1.b1
Description:
The MMCR calibration was incorrect causing a very large positive shift in reflectivity 
values.
Measurements:nsammcrmomC1.b1:
  • Reflectivity(Reflectivity)


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DQRID : D100402.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/10/2009180012/22/20091700Incorrect
Subject:
NSA/MMCR/C1 - Coherent Up/Down Converter failure
DataStreams:nsammcrmomC1.b1
Description:
Coherent Up/Down Converter failure.  Replacement was installed on 12/22/2009 at 1700.
Measurements:nsammcrmomC1.b1:
  • Reflectivity(Reflectivity)


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