Data Quality Reports for Session: 120084 User: dhuang Completed: 06/15/2009

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D040312.1SGP/MMCR/C1 - Reprocess: Incorrect units for "heights" fieldsgpmmcrmomC1.b1
D041005.2SGP/MMCR/C1 - Reprocessed: Corrupt CDF filesgpmmcrmomC1.b1
D050117.5SGP/MMCR/C1 - Loss of synchronizationsgpmmcrmomC1.00, sgpmmcrmomC1.b1, sgpmmcrspecC1.a0
D050120.1SGP/MMCR/C1 - Instrument failuresgpmmcrmomC1.00, sgpmmcrmomC1.b1, sgpmmcrspectraC1.a0
D050222.2SGP/MMCR/C1 - Power supply failuresgparscl1clothC1.c1, sgparsclbnd1clothC1.c1, sgpmmcrmomC1.00, sgpmmcrmomC1.b1,
sgpmmcrspectraC1.a0
D061229.1SGP/MMCR/C1 - TWTA FaultingsgpmmcrmomC1.00, sgpmmcrmomC1.b1, sgpmmcrspecmomC1.a0
D080324.1SGP/MMCR/C1 - Sensitivity ShiftsgpmmcrmomC1.b1
D080421.2SGP/MMCR/C1 - Polarization Mode ProblemsgpmmcrmomC1.b1, sgpmmcrspecmomC1.a0


DQRID : D040312.1
Start DateStart TimeEnd DateEnd Time
09/09/2003211603/01/20042359
Subject:
SGP/MMCR/C1 - Reprocess: Incorrect units for "heights" field
DataStreams:sgpmmcrmomC1.b1
Description:
The "heights" field metadata indicates that units are "m AGL" (meters above ground level) 
when in fact the heights data are recorded in "m MSL" (meters above mean sea leavel).
Measurements:sgpmmcrmomC1.b1:
  • Array of heights for each power(heights)

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DQRID : D041005.2
Start DateStart TimeEnd DateEnd Time
02/26/2004000002/26/20042359
Subject:
SGP/MMCR/C1 - Reprocessed: Corrupt CDF file
DataStreams:sgpmmcrmomC1.b1
Description:
An isolated oddity in the ModeNum field of the sgpmmcrmomC1.b1 file
for 2004.02.26 was identified.  The following odd values appeared
in the original cdf file, for 12 consecutive entries starting with
profile 8611:

1047, -1, 14282, 20180, 8670, 3550, 8651, -29810, 30695, -1, 2030, 16183

The raw data were fine.  This file was reprocessed on Sept 30, 2004.
Measurements:sgpmmcrmomC1.b1:
  • Operating Set for this Record(ModeNum)

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DQRID : D050117.5
Start DateStart TimeEnd DateEnd Time
01/16/2005000001/16/20051700
Subject:
SGP/MMCR/C1 - Loss of synchronization
DataStreams:sgpmmcrmomC1.00, sgpmmcrmomC1.b1, sgpmmcrspecC1.a0
Description:
During my daily review of the MMCR operaton, I noticed that the radar returns were out of 
synch with returns appearing all throughout the range gates.  I remotely rebooted the 
MMCR and it returned to normal operation.
Measurements:sgpmmcrmomC1.b1:
  • Peak tranmitted power, averaged over the course of the hour(PeakTransmittedPowerAvg)
  • Receiver Gain(RxGain)
  • Range Corrected Calibrated Power(RangeCorrectedPower)
  • Receiver 290K Level(Rx290KLevel)
  • Number of Gate Heights(NumHeights)
  • Mean Noise Level(NoiseLevel)
  • radar mode char identifier(ModeDescription)
  • Receiver Cal Time Stamp(RxCalTimeStamp)
  • base time(base_time)
  • MMCR Spectral Width(SpectralWidth)
  • Pulse Width(PulseWidth)
  • Number of Code Bits(NumCodeBits)
  • Power (uncalibrated)(Power)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • Circular Depolarization Ratio(CircularDepolarizationRatio)
  • Receiver Mode(ReceiverMode)
  • Signal to Noise Ratio(SignalToNoiseRatio)
  • Time offset of tweaks from base_time(time_offset)
  • Array of heights for each power(heights)
  • TWT Status Code, details forthcoming from MMCR vendor(TWTStatusCode)
  • Current Receiver Number(ReceiverNumber)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Time associated with hourly averaged values(TimeAvg)
  • Dummy altitude for Zeb(alt)
  • Receiver Cal Check Level(CalCheckLevel)
  • Average Noise Level (S/N<0)(AvgNoiseLevel)
  • Delay to First Range Gate(StartGateDelay)
  • Number of Points in FFT(NumFFT)
  • Receiver Cal Check Time Stamp(CalCheckTime)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Inter-Pulse Period(InterPulsePeriod)
  • DC Filtering ON-OFF Status(DCFilterONOFF)
  • Windowing ON-OFF Status(WindowingONOFF)
  • Receiver Sky Noise(SkyNoiseLevel)
  • Number of Receiver(NumReceivers)
  • lat(lat)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • Gate Spacing(GateSpacing)
  • Operating Set for this Record(ModeNum)
  • MMCR Reflectivity(Reflectivity)
  • Data Quality Status(DataQualityStatus)
  • Number of Spectral Averages(NumSpectralAverages)
  • Max. height of clutter removal(ClutterHeight)
  • time(time)
  • lon(lon)
  • Radar Constant(RadarConstant)
sgpmmcrmomC1.00:
  • Raw data stream - documentation not supported(raw)
sgpmmcrspecC1.a0:
  • lat(lat)
  • Receiver Cal Time Stamp(RxCalTimeStamp)
  • Mean Noise Level(NoiseLevel)
  • Signal to Noise Ratio(SignalToNoiseRatio)
  • Pulse Width(PulseWidth)
  • Receiver 290K Level(Rx290KLevel)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Spectral Data(Spectra)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Number of Points in FFT(NumFFT)
  • Data Quality Status(DataQualityStatus)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • Delay to First Range Gate(StartGateDelay)
  • Operating Set for this Record(ModeNum)
  • Number of Gate Heights(NumHeights)
  • Circular Depolarization Ratio(CircularDepolarizationRatio)
  • Azimuth(Azimuth)
  • Receiver Mode(ReceiverMode)
  • Range Corrected Calibrated Power(RangeCorrectedPower)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • Windowing ON-OFF Status(WindowingONOFF)
  • MMCR Spectral Width(SpectralWidth)
  • Gate Spacing(GateSpacing)
  • radar mode char identifier(ModeDescription)
  • base time(base_time)
  • Average Noise Level (S/N<0)(AvgNoiseLevel)
  • Elevation(Elevation)
  • Number of Code Bits(NumCodeBits)
  • Dummy altitude for Zeb(alt)
  • Number of Spectral Averages(NumSpectralAverages)
  • MMCR Reflectivity(Reflectivity)
  • Radar Constant(RadarConstant)
  • Number of Receiver(NumReceivers)
  • Height of Center of Each Range Bin(Heights)
  • First Order Estimate of Spectral Count Calibration(CalibrationConstant)
  • Inter-Pulse Period(InterPulsePeriod)
  • Current Receiver Number(ReceiverNumber)
  • DC Filtering ON-OFF Status(DCFilterONOFF)
  • Receiver Cal Check Time Stamp(CalCheckTime)
  • Max. height of clutter removal(ClutterHeight)
  • Power (uncalibrated)(Power)
  • Time offset of tweaks from base_time(time_offset)
  • Receiver Sky Noise(SkyNoiseLevel)
  • lon(lon)
  • Receiver Gain(RxGain)
  • Receiver Cal Check Level(CalCheckLevel)

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DQRID : D050120.1
Start DateStart TimeEnd DateEnd Time
01/16/2005001502/15/20052100
Subject:
SGP/MMCR/C1 - Instrument failure
DataStreams:sgpmmcrmomC1.00, sgpmmcrmomC1.b1, sgpmmcrspectraC1.a0
Description:
The receiver/modulator had a power supply that had failed.
Measurements:sgpmmcrmomC1.b1:
  • Peak tranmitted power, averaged over the course of the hour(PeakTransmittedPowerAvg)
  • Receiver Gain(RxGain)
  • Range Corrected Calibrated Power(RangeCorrectedPower)
  • Receiver 290K Level(Rx290KLevel)
  • Number of Gate Heights(NumHeights)
  • Mean Noise Level(NoiseLevel)
  • Receiver Cal Time Stamp(RxCalTimeStamp)
  • radar mode char identifier(ModeDescription)
  • base time(base_time)
  • MMCR Spectral Width(SpectralWidth)
  • Number of Code Bits(NumCodeBits)
  • Pulse Width(PulseWidth)
  • Power (uncalibrated)(Power)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • Circular Depolarization Ratio(CircularDepolarizationRatio)
  • Receiver Mode(ReceiverMode)
  • Signal to Noise Ratio(SignalToNoiseRatio)
  • Time offset of tweaks from base_time(time_offset)
  • Array of heights for each power(heights)
  • TWT Status Code, details forthcoming from MMCR vendor(TWTStatusCode)
  • Current Receiver Number(ReceiverNumber)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Time associated with hourly averaged values(TimeAvg)
  • Dummy altitude for Zeb(alt)
  • Receiver Cal Check Level(CalCheckLevel)
  • Average Noise Level (S/N<0)(AvgNoiseLevel)
  • Delay to First Range Gate(StartGateDelay)
  • Number of Points in FFT(NumFFT)
  • Receiver Cal Check Time Stamp(CalCheckTime)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Inter-Pulse Period(InterPulsePeriod)
  • DC Filtering ON-OFF Status(DCFilterONOFF)
  • Windowing ON-OFF Status(WindowingONOFF)
  • Number of Receiver(NumReceivers)
  • Receiver Sky Noise(SkyNoiseLevel)
  • lat(lat)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • Gate Spacing(GateSpacing)
  • Operating Set for this Record(ModeNum)
  • MMCR Reflectivity(Reflectivity)
  • Data Quality Status(DataQualityStatus)
  • Number of Spectral Averages(NumSpectralAverages)
  • Max. height of clutter removal(ClutterHeight)
  • time(time)
  • lon(lon)
  • Radar Constant(RadarConstant)
sgpmmcrmomC1.00:
  • Raw data stream - documentation not supported(raw)
sgpmmcrspectraC1.a0:
  • Rx bandwidtch switch code(Switch)
  • Pulse Width(PulseWidth)
  • Dummy altitude for Zeb(alt)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • lon(lon)
  • Spectral Data(Spectra)
  • Delay to First Range Gate(StartGateDelay)
  • base time(base_time)
  • Gate Spacing(GateSpacing)
  • Inter-Pulse Period(InterPulsePeriod)
  • Height of Center of Each Range Bin(Heights)
  • Number of Spectra Averaged(NumSpectraAveraged)
  • Number of Gate Heights(NumHeights)
  • Time offset of tweaks from base_time(time_offset)
  • lat(lat)
  • Delay thgrough Rx(Delay)
  • Number of Code Bits(NumCodeBits)
  • Number of Ffts(NumFft)

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DQRID : D050222.2
Start DateStart TimeEnd DateEnd Time
01/16/2005003002/11/20052115
Subject:
SGP/MMCR/C1 - Power supply failure
DataStreams:sgparscl1clothC1.c1, sgparsclbnd1clothC1.c1, sgpmmcrmomC1.00, sgpmmcrmomC1.b1,
sgpmmcrspectraC1.a0
Description:
A power supply failed in the MMCR's receiver.  During the period of this DQR, the radar 
would appear to work but the calibration is probably incoorect during good portions of this 
time.  The power supply was replaced and normal operation resumed at 2115 on 02/11/2005.
Measurements:sgparsclbnd1clothC1.c1:
  • Bottom Height of Hydrometeor Layer from Composite (MMCR/Campbell et al. MPL)
    Algorithms(CloudLayerBottomHeightMplCamp)
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
  • base time(base_time)
  • Bottom Height of Hydrometeor Layer from Composite (MMCR/Clothiaux et al. MPL)
    Algorithms(CloudLayerBottomHeightMplCloth)
  • Time offset of tweaks from base_time(time_offset)
  • Top Height of Hydrometeor Layer from Composite (MMCR/Campbell et al. MPL)
    Algorithms(CloudLayerTopHeightMplCamp)
  • Top Height of Hydrometeor Layer from Composite (MMCR/Clothiaux et al. MPL)
    Algorithms(CloudLayerTopHeightMplCloth)
sgpmmcrmomC1.b1:
  • Peak tranmitted power, averaged over the course of the hour(PeakTransmittedPowerAvg)
  • Receiver Gain(RxGain)
  • Range Corrected Calibrated Power(RangeCorrectedPower)
  • Receiver 290K Level(Rx290KLevel)
  • Number of Gate Heights(NumHeights)
  • Mean Noise Level(NoiseLevel)
  • radar mode char identifier(ModeDescription)
  • Receiver Cal Time Stamp(RxCalTimeStamp)
  • base time(base_time)
  • MMCR Spectral Width(SpectralWidth)
  • Pulse Width(PulseWidth)
  • Number of Code Bits(NumCodeBits)
  • Power (uncalibrated)(Power)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • Circular Depolarization Ratio(CircularDepolarizationRatio)
  • Receiver Mode(ReceiverMode)
  • Signal to Noise Ratio(SignalToNoiseRatio)
  • Time offset of tweaks from base_time(time_offset)
  • Array of heights for each power(heights)
  • TWT Status Code, details forthcoming from MMCR vendor(TWTStatusCode)
  • Current Receiver Number(ReceiverNumber)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Time associated with hourly averaged values(TimeAvg)
  • Dummy altitude for Zeb(alt)
  • Receiver Cal Check Level(CalCheckLevel)
  • Average Noise Level (S/N<0)(AvgNoiseLevel)
  • Delay to First Range Gate(StartGateDelay)
  • Number of Points in FFT(NumFFT)
  • Receiver Cal Check Time Stamp(CalCheckTime)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Inter-Pulse Period(InterPulsePeriod)
  • DC Filtering ON-OFF Status(DCFilterONOFF)
  • Windowing ON-OFF Status(WindowingONOFF)
  • Number of Receiver(NumReceivers)
  • Receiver Sky Noise(SkyNoiseLevel)
  • lat(lat)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • Gate Spacing(GateSpacing)
  • Operating Set for this Record(ModeNum)
  • MMCR Reflectivity(Reflectivity)
  • Data Quality Status(DataQualityStatus)
  • Number of Spectral Averages(NumSpectralAverages)
  • Max. height of clutter removal(ClutterHeight)
  • time(time)
  • lon(lon)
  • Radar Constant(RadarConstant)
sgpmmcrmomC1.00:
  • Raw data stream - documentation not supported(raw)
sgpmmcrspectraC1.a0:
  • Rx bandwidtch switch code(Switch)
  • Pulse Width(PulseWidth)
  • Dummy altitude for Zeb(alt)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • lon(lon)
  • Spectral Data(Spectra)
  • Delay to First Range Gate(StartGateDelay)
  • base time(base_time)
  • Gate Spacing(GateSpacing)
  • Inter-Pulse Period(InterPulsePeriod)
  • Height of Center of Each Range Bin(Heights)
  • Number of Spectra Averaged(NumSpectraAveraged)
  • Number of Gate Heights(NumHeights)
  • Time offset of tweaks from base_time(time_offset)
  • lat(lat)
  • Delay thgrough Rx(Delay)
  • Number of Code Bits(NumCodeBits)
  • Number of Ffts(NumFft)
sgparscl1clothC1.c1:
  • Top Height of Hydrometeor Layer from Composite (MMCR/Clothiaux et al. MPL)
    Algorithms(CloudLayerTopHeightMplCloth)
  • Bottom Height of Hydrometeor Layer from Composite (MMCR/Campbell et al. MPL)
    Algorithms(CloudLayerBottomHeightMplCamp)
  • MPL Campbell et al. Algorithm Cloud Base Height(CloudBaseMplCamp)
  • MPL Scott Algorithm Cloud Base Height(CloudBaseMplScott)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • MMCR Top Height of Lowest Detected Layer before Clutter Removal(RadarFirstTop)
  • MPL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseMplCloth)
  • Microwave Radiometer Wet Window/Optical Rain Gauge Cloud Base Height(CloudBasePrecipitation)
  • MMCR Signal-to-Noise Ratio(SignaltoNoiseRatio)
  • MMCR Spectral Width(SpectralWidth)
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)
  • MMCR Reflectivity with Clutter Removed(ReflectivityNoClutter)
  • MPL Campbell et al. Algorithm Cloud Mask Occurrence(CloudMaskMplCamp)
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
  • base time(base_time)
  • MMCR Mode I.D.(ModeId)
  • Height of Center of Each Range Bin(Heights)
  • MPL Cloth et al. Algorithm Cloud Mask(CloudMaskMplCloth)
  • Time offset of tweaks from base_time(time_offset)
  • MMCR Best Estimate of Hydrometeor Reflectivity(ReflectivityBestEstimate)
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • Bottom Height of Hydrometeor Layer from Composite (MMCR/Clothiaux et al. MPL)
    Algorithms(CloudLayerBottomHeightMplCloth)
  • MMCR Reflectivity(Reflectivity)
  • Top Height of Hydrometeor Layer from Composite (MMCR/Campbell et al. MPL)
    Algorithms(CloudLayerTopHeightMplCamp)

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DQRID : D061229.1
Start DateStart TimeEnd DateEnd Time
11/23/2006190011/23/20062359
12/03/2006090012/03/20062359
12/04/2006190012/04/20062359
12/06/2006020012/06/20062359
12/07/2006130012/07/20061600
12/11/2006070012/11/20062359
12/17/2006020012/17/20062359
12/18/2006040012/18/20062359
12/24/2006060012/24/20062359
12/26/2006090012/26/20061300
12/27/2006140012/27/20061500
01/07/2007170001/07/20071900
01/10/2007100001/10/20071400
01/12/2007110001/12/20071300
01/13/2007080001/13/20071530
01/13/2007190001/13/20072359
01/14/2007033001/14/20071400
01/15/2007030001/15/20071500
Subject:
SGP/MMCR/C1 - TWTA Faulting
DataStreams:sgpmmcrmomC1.00, sgpmmcrmomC1.b1, sgpmmcrspecmomC1.a0
Description:
The MMCR transmitter (TWTA) has been having a low helix current fault.  This results in 
the transmitter shutting down.  However, the radar continues to collect data.  The MMCR 
restarts the TWTA at 0000 each day, hence the 2359 end times for many of these intervals.
Measurements:sgpmmcrmomC1.b1:
  • Peak tranmitted power, averaged over the course of the hour(PeakTransmittedPowerAvg)
  • Receiver Gain(RxGain)
  • Range Corrected Calibrated Power(RangeCorrectedPower)
  • Receiver 290K Level(Rx290KLevel)
  • Number of Gate Heights(NumHeights)
  • Mean Noise Level(NoiseLevel)
  • radar mode char identifier(ModeDescription)
  • Receiver Cal Time Stamp(RxCalTimeStamp)
  • base time(base_time)
  • MMCR Spectral Width(SpectralWidth)
  • Pulse Width(PulseWidth)
  • Number of Code Bits(NumCodeBits)
  • Power (uncalibrated)(Power)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • Circular Depolarization Ratio(CircularDepolarizationRatio)
  • Receiver Mode(ReceiverMode)
  • Signal to Noise Ratio(SignalToNoiseRatio)
  • Time offset of tweaks from base_time(time_offset)
  • Array of heights for each power(heights)
  • TWT Status Code, details forthcoming from MMCR vendor(TWTStatusCode)
  • Current Receiver Number(ReceiverNumber)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Time associated with hourly averaged values(TimeAvg)
  • Dummy altitude for Zeb(alt)
  • Receiver Cal Check Level(CalCheckLevel)
  • Average Noise Level (S/N<0)(AvgNoiseLevel)
  • Delay to First Range Gate(StartGateDelay)
  • Number of Points in FFT(NumFFT)
  • Receiver Cal Check Time Stamp(CalCheckTime)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Inter-Pulse Period(InterPulsePeriod)
  • DC Filtering ON-OFF Status(DCFilterONOFF)
  • Windowing ON-OFF Status(WindowingONOFF)
  • Number of Receiver(NumReceivers)
  • Receiver Sky Noise(SkyNoiseLevel)
  • lat(lat)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • Gate Spacing(GateSpacing)
  • Operating Set for this Record(ModeNum)
  • MMCR Reflectivity(Reflectivity)
  • Data Quality Status(DataQualityStatus)
  • Number of Spectral Averages(NumSpectralAverages)
  • Max. height of clutter removal(ClutterHeight)
  • time(time)
  • lon(lon)
  • Radar Constant(RadarConstant)
sgpmmcrmomC1.00:
  • Raw data stream - documentation not supported(raw)
sgpmmcrspecmomC1.a0:
  • Elevation(Elevation)
  • Receiver Gain(RxGain)
  • Delay to First Range Gate(StartGateDelay)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Power (uncalibrated)(Power)
  • Operating Set for this Record(ModeNum)
  • Time offset of tweaks from base_time(time_offset)
  • Receiver Sky Noise(SkyNoiseLevel)
  • Range Corrected Calibrated Power(RangeCorrectedPower)
  • lat(lat)
  • Inter-Pulse Period(InterPulsePeriod)
  • Height of Center of Each Range Bin(Heights)
  • Data Quality Status(DataQualityStatus)
  • lon(lon)
  • Max. height of clutter removal(ClutterHeight)
  • Azimuth(Azimuth)
  • Receiver Cal Check Level(CalCheckLevel)
  • radar mode char identifier(ModeDescription)
  • Number of Gate Heights(NumHeights)
  • Receiver Cal Time Stamp(RxCalTimeStamp)
  • DC Filtering ON-OFF Status(DCFilterONOFF)
  • Receiver Mode(ReceiverMode)
  • Number of Receiver(NumReceivers)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • Current Receiver Number(ReceiverNumber)
  • MMCR Spectral Width(SpectralWidth)
  • Windowing ON-OFF Status(WindowingONOFF)
  • Dummy altitude for Zeb(alt)
  • Circular Depolarization Ratio(CircularDepolarizationRatio)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Number of Points in FFT(NumFFT)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • Spectral Data(Spectra)
  • MMCR Reflectivity(Reflectivity)
  • base time(base_time)
  • Receiver 290K Level(Rx290KLevel)
  • Number of Code Bits(NumCodeBits)
  • Pulse Width(PulseWidth)
  • Gate Spacing(GateSpacing)
  • Radar Constant(RadarConstant)
  • Signal to Noise Ratio(SignalToNoiseRatio)
  • Mean Noise Level(NoiseLevel)
  • First Order Estimate of Spectral Count Calibration(CalibrationConstant)
  • Receiver Cal Check Time Stamp(CalCheckTime)
  • Number of Spectral Averages(NumSpectralAverages)
  • Average Noise Level (S/N<0)(AvgNoiseLevel)

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DQRID : D080324.1
Start DateStart TimeEnd DateEnd Time
02/21/2008193002/26/20081500
Subject:
SGP/MMCR/C1 - Sensitivity Shift
DataStreams:sgpmmcrmomC1.b1
Description:
There was a sensitivity shift on the MMCR during this period of time.  Cycling the power 
cleared the problem. Do not use data.
Measurements:sgpmmcrmomC1.b1:
  • Peak tranmitted power, averaged over the course of the hour(PeakTransmittedPowerAvg)
  • Receiver Gain(RxGain)
  • Range Corrected Calibrated Power(RangeCorrectedPower)
  • Receiver 290K Level(Rx290KLevel)
  • Number of Gate Heights(NumHeights)
  • Receiver Cal Check Level(CalCheckLevel)
  • Average Noise Level (S/N<0)(AvgNoiseLevel)
  • Delay to First Range Gate(StartGateDelay)
  • Number of Points in FFT(NumFFT)
  • Receiver Cal Check Time Stamp(CalCheckTime)
  • Mean Noise Level(NoiseLevel)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Inter-Pulse Period(InterPulsePeriod)
  • DC Filtering ON-OFF Status(DCFilterONOFF)
  • radar mode char identifier(ModeDescription)
  • Receiver Cal Time Stamp(RxCalTimeStamp)
  • base time(base_time)
  • Windowing ON-OFF Status(WindowingONOFF)
  • MMCR Spectral Width(SpectralWidth)
  • Pulse Width(PulseWidth)
  • Number of Code Bits(NumCodeBits)
  • Power (uncalibrated)(Power)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • Receiver Sky Noise(SkyNoiseLevel)
  • Number of Receiver(NumReceivers)
  • lat(lat)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • Gate Spacing(GateSpacing)
  • Operating Set for this Record(ModeNum)
  • Circular Depolarization Ratio(CircularDepolarizationRatio)
  • Receiver Mode(ReceiverMode)
  • Signal to Noise Ratio(SignalToNoiseRatio)
  • MMCR Reflectivity(Reflectivity)
  • Data Quality Status(DataQualityStatus)
  • Time offset of tweaks from base_time(time_offset)
  • Array of heights for each power(heights)
  • Number of Spectral Averages(NumSpectralAverages)
  • TWT Status Code, details forthcoming from MMCR vendor(TWTStatusCode)
  • Max. height of clutter removal(ClutterHeight)
  • Current Receiver Number(ReceiverNumber)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • time(time)
  • Time associated with hourly averaged values(TimeAvg)
  • lon(lon)
  • Dummy altitude for Zeb(alt)
  • Radar Constant(RadarConstant)

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DQRID : D080421.2
Start DateStart TimeEnd DateEnd Time
04/17/2008140004/23/20081445
Subject:
SGP/MMCR/C1 - Polarization Mode Problem
DataStreams:sgpmmcrmomC1.b1, sgpmmcrspecmomC1.a0
Description:
The cross-polarization and co-polarization modes (6 and 5) were measuring 
cross-polarization only.  This means that one of the control signals was not hooked up correctly.  The 
signals were rerouted on 4/23/2008.

The General Mode (mode 3) is a co-polarization channel and worked during this time period. 
 The reason why we don't use the general mode all of the time is that the co-pol and 
cross-pol modes are temporally closer and make a better estimation of linear depolarization 
ratio.
Measurements:sgpmmcrmomC1.b1:
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Signal to Noise Ratio(SignalToNoiseRatio)
  • MMCR Reflectivity(Reflectivity)
  • MMCR Spectral Width(SpectralWidth)
sgpmmcrspecmomC1.a0:
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • MMCR Spectral Width(SpectralWidth)
  • MMCR Reflectivity(Reflectivity)

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