Data Quality Reports for Session: 116552 User: sherman Completed: 12/18/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060713.2TWP/MMCR/C1 - Reprocess: Reflectivities too hightwpmmcrmomC1.b1
D070112.1TWP/MMCR/C1 - Reprocess: Height ErrortwpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0
D070125.1TWP/MMCR/C1 - Phase lock faultstwpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0
D070129.1TWP/MMCR/C1 - Error in recorded heightstwpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0
D070131.1TWP/MMCR/C1 - Receiver locked uptwpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0


DQRID : D060713.2
Start DateStart TimeEnd DateEnd Time
06/16/2006030006/20/20062100
Subject:
TWP/MMCR/C1 - Reprocess: Reflectivities too high
DataStreams:twpmmcrmomC1.b1
Description:
After the upgrade to PIRAQ-III, the reflectivies are too high by ~ 23 dBZ.  The problem 
was caused by a failure of one of the power supplies that turned off one of the rf switches.

The data can be used but 23 dB should be subtracted from the reported values.  Due to the 
unknown exact isolation the rf switch offers, one should assume that the reflectivity 
will then be accurate to +/- 3 dBZ.
Measurements:twpmmcrmomC1.b1:
  • MMCR Reflectivity(Reflectivity)

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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:
  • Array of heights for each power(heights)
twpmmcrspecmomC1.a0:
  • Height of Center of Each Range Bin(Heights)
twpmmcrmomC1.00:
  • Raw data stream - documentation not supported(raw)

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DQRID : D070125.1
Start DateStart TimeEnd DateEnd Time
01/25/2007063001/25/20071525
Subject:
TWP/MMCR/C1 - Phase lock faults
DataStreams:twpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0
Description:
Phase lock faults on the coherent up/down converter (CUDC) caused a receiver failure.  
Cycling the power on the CUDC brought the MMCR back to normal operation.
Measurements:twpmmcrmomC1.b1:
  • Power (uncalibrated)(Power)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • lon(lon)
  • Peak tranmitted power, averaged over the course of the hour(PeakTransmittedPowerAvg)
  • Mean Noise Level(NoiseLevel)
  • MMCR Spectral Width(SpectralWidth)
  • Number of Points in FFT(NumFFT)
  • Receiver Gain(RxGain)
  • Time offset of tweaks from base_time(time_offset)
  • TWT Status Code, details forthcoming from MMCR vendor(TWTStatusCode)
  • Number of Receiver(NumReceivers)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Dummy altitude for Zeb(alt)
  • Pulse Width(PulseWidth)
  • Data Quality Status(DataQualityStatus)
  • Radar Constant(RadarConstant)
  • Current Receiver Number(ReceiverNumber)
  • Circular Depolarization Ratio(CircularDepolarizationRatio)
  • MMCR Reflectivity(Reflectivity)
  • Receiver Cal Check Time Stamp(CalCheckTime)
  • Inter-Pulse Period(InterPulsePeriod)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Operating Set for this Record(ModeNum)
  • base time(base_time)
  • Receiver Cal Time Stamp(RxCalTimeStamp)
  • Receiver Mode(ReceiverMode)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • lat(lat)
  • Array of heights for each power(heights)
  • Range Corrected Calibrated Power(RangeCorrectedPower)
  • Max. height of clutter removal(ClutterHeight)
  • Average Noise Level (S/N<0)(AvgNoiseLevel)
  • Receiver 290K Level(Rx290KLevel)
  • Receiver Sky Noise(SkyNoiseLevel)
  • time(time)
  • Delay to First Range Gate(StartGateDelay)
  • Windowing ON-OFF Status(WindowingONOFF)
  • Gate Spacing(GateSpacing)
  • Number of Code Bits(NumCodeBits)
  • radar mode char identifier(ModeDescription)
  • Receiver Cal Check Level(CalCheckLevel)
  • Time associated with hourly averaged values(TimeAvg)
  • Number of Gate Heights(NumHeights)
  • DC Filtering ON-OFF Status(DCFilterONOFF)
  • Signal to Noise Ratio(SignalToNoiseRatio)
  • Number of Spectral Averages(NumSpectralAverages)
twpmmcrspecmomC1.a0:
  • Time offset of tweaks from base_time(time_offset)
  • Average Noise Level (S/N<0)(AvgNoiseLevel)
  • Dummy altitude for Zeb(alt)
  • Receiver Gain(RxGain)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • Number of Code Bits(NumCodeBits)
  • Number of Gate Heights(NumHeights)
  • Range Corrected Calibrated Power(RangeCorrectedPower)
  • Signal to Noise Ratio(SignalToNoiseRatio)
  • Receiver Mode(ReceiverMode)
  • base time(base_time)
  • Windowing ON-OFF Status(WindowingONOFF)
  • Inter-Pulse Period(InterPulsePeriod)
  • Receiver Cal Time Stamp(RxCalTimeStamp)
  • lat(lat)
  • Height of Center of Each Range Bin(Heights)
  • Pulse Width(PulseWidth)
  • Spectral Data(Spectra)
  • Power (uncalibrated)(Power)
  • lon(lon)
  • Gate Spacing(GateSpacing)
  • Data Quality Status(DataQualityStatus)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Current Receiver Number(ReceiverNumber)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Radar Constant(RadarConstant)
  • Receiver Sky Noise(SkyNoiseLevel)
  • Receiver 290K Level(Rx290KLevel)
  • Elevation(Elevation)
  • First Order Estimate of Spectral Count Calibration(CalibrationConstant)
  • Mean Noise Level(NoiseLevel)
  • Receiver Cal Check Level(CalCheckLevel)
  • DC Filtering ON-OFF Status(DCFilterONOFF)
  • Receiver Cal Check Time Stamp(CalCheckTime)
  • Azimuth(Azimuth)
  • Number of Points in FFT(NumFFT)
  • Max. height of clutter removal(ClutterHeight)
  • radar mode char identifier(ModeDescription)
  • Number of Receiver(NumReceivers)
  • Circular Depolarization Ratio(CircularDepolarizationRatio)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • Operating Set for this Record(ModeNum)
  • MMCR Reflectivity(Reflectivity)
  • Number of Spectral Averages(NumSpectralAverages)
  • MMCR Spectral Width(SpectralWidth)
  • Delay to First Range Gate(StartGateDelay)
twpmmcrmomC1.00:
  • Raw data stream - documentation not supported(raw)

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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:
  • Array of heights for each power(heights)
twpmmcrspecmomC1.a0:
  • Height of Center of Each Range Bin(Heights)
twpmmcrmomC1.00:
  • Raw data stream - documentation not supported(raw)

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DQRID : D070131.1
Start DateStart TimeEnd DateEnd Time
01/27/2007220001/31/20070100
Subject:
TWP/MMCR/C1 - Receiver locked up
DataStreams:twpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0
Description:
The MMCR receiver "locked up" and was not receiving during this period.
Measurements:twpmmcrmomC1.b1:
  • Power (uncalibrated)(Power)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • lon(lon)
  • Peak tranmitted power, averaged over the course of the hour(PeakTransmittedPowerAvg)
  • Mean Noise Level(NoiseLevel)
  • MMCR Spectral Width(SpectralWidth)
  • Number of Points in FFT(NumFFT)
  • Receiver Gain(RxGain)
  • Time offset of tweaks from base_time(time_offset)
  • TWT Status Code, details forthcoming from MMCR vendor(TWTStatusCode)
  • Number of Receiver(NumReceivers)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Dummy altitude for Zeb(alt)
  • Pulse Width(PulseWidth)
  • Data Quality Status(DataQualityStatus)
  • Radar Constant(RadarConstant)
  • Current Receiver Number(ReceiverNumber)
  • Circular Depolarization Ratio(CircularDepolarizationRatio)
  • MMCR Reflectivity(Reflectivity)
  • Receiver Cal Check Time Stamp(CalCheckTime)
  • Inter-Pulse Period(InterPulsePeriod)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Operating Set for this Record(ModeNum)
  • base time(base_time)
  • Receiver Cal Time Stamp(RxCalTimeStamp)
  • Receiver Mode(ReceiverMode)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • lat(lat)
  • Array of heights for each power(heights)
  • Range Corrected Calibrated Power(RangeCorrectedPower)
  • Max. height of clutter removal(ClutterHeight)
  • Average Noise Level (S/N<0)(AvgNoiseLevel)
  • Receiver 290K Level(Rx290KLevel)
  • Receiver Sky Noise(SkyNoiseLevel)
  • time(time)
  • Delay to First Range Gate(StartGateDelay)
  • Windowing ON-OFF Status(WindowingONOFF)
  • Gate Spacing(GateSpacing)
  • Number of Code Bits(NumCodeBits)
  • radar mode char identifier(ModeDescription)
  • Receiver Cal Check Level(CalCheckLevel)
  • Time associated with hourly averaged values(TimeAvg)
  • Number of Gate Heights(NumHeights)
  • DC Filtering ON-OFF Status(DCFilterONOFF)
  • Signal to Noise Ratio(SignalToNoiseRatio)
  • Number of Spectral Averages(NumSpectralAverages)
twpmmcrspecmomC1.a0:
  • Time offset of tweaks from base_time(time_offset)
  • Average Noise Level (S/N<0)(AvgNoiseLevel)
  • Dummy altitude for Zeb(alt)
  • Receiver Gain(RxGain)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • Number of Code Bits(NumCodeBits)
  • Number of Gate Heights(NumHeights)
  • Range Corrected Calibrated Power(RangeCorrectedPower)
  • Signal to Noise Ratio(SignalToNoiseRatio)
  • Receiver Mode(ReceiverMode)
  • base time(base_time)
  • Windowing ON-OFF Status(WindowingONOFF)
  • Inter-Pulse Period(InterPulsePeriod)
  • Receiver Cal Time Stamp(RxCalTimeStamp)
  • lat(lat)
  • Height of Center of Each Range Bin(Heights)
  • Pulse Width(PulseWidth)
  • Spectral Data(Spectra)
  • Power (uncalibrated)(Power)
  • lon(lon)
  • Gate Spacing(GateSpacing)
  • Data Quality Status(DataQualityStatus)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Current Receiver Number(ReceiverNumber)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Radar Constant(RadarConstant)
  • Receiver Sky Noise(SkyNoiseLevel)
  • Receiver 290K Level(Rx290KLevel)
  • Elevation(Elevation)
  • First Order Estimate of Spectral Count Calibration(CalibrationConstant)
  • Mean Noise Level(NoiseLevel)
  • Receiver Cal Check Level(CalCheckLevel)
  • DC Filtering ON-OFF Status(DCFilterONOFF)
  • Receiver Cal Check Time Stamp(CalCheckTime)
  • Azimuth(Azimuth)
  • Number of Points in FFT(NumFFT)
  • Max. height of clutter removal(ClutterHeight)
  • radar mode char identifier(ModeDescription)
  • Number of Receiver(NumReceivers)
  • Circular Depolarization Ratio(CircularDepolarizationRatio)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • Operating Set for this Record(ModeNum)
  • MMCR Reflectivity(Reflectivity)
  • Number of Spectral Averages(NumSpectralAverages)
  • MMCR Spectral Width(SpectralWidth)
  • Delay to First Range Gate(StartGateDelay)
twpmmcrmomC1.00:
  • Raw data stream - documentation not supported(raw)

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