Data Quality Reports for Session: 118095 User: eluke Completed: 03/11/2009

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060803.1NSA/MMCR/C1 - Sensitivity Loss, Calibration WrongnsammcrmomC1.00, nsammcrmomC1.b1, nsammcrspecmomC1.a0


DQRID : D060803.1
Start DateStart TimeEnd DateEnd Time
08/01/2005000002/01/20072359
Subject:
NSA/MMCR/C1 - Sensitivity Loss, Calibration Wrong
DataStreams:nsammcrmomC1.00, nsammcrmomC1.b1, nsammcrspecmomC1.a0
Description:
Jay Mace compared data from CLOUDSAT to the MMCR and found significant discrepancies.  It 
appears that the MMCR has a sensitivity problem and is underreporting reflectivity by ~20 
dBZ.  A comparison with the MPL shows that this might be a gradual degradation, i.e. 
there are no apparent shifts identifying when this might have occured.
Measurements:nsammcrmomC1.00:
  • Raw data stream - documentation not supported(raw)
nsammcrspecmomC1.a0:
  • Inter-Pulse Period(InterPulsePeriod)
  • Range Corrected Calibrated Power(RangeCorrectedPower)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Data Quality Status(DataQualityStatus)
  • Elevation(Elevation)
  • Mean Noise Level(NoiseLevel)
  • Circular Depolarization Ratio(CircularDepolarizationRatio)
  • Receiver Sky Noise(SkyNoiseLevel)
  • Operating Set for this Record(ModeNum)
  • Receiver Cal Check Level(CalCheckLevel)
  • MMCR Spectral Width(SpectralWidth)
  • Spectral Data(Spectra)
  • Number of Code Bits(NumCodeBits)
  • Average Noise Level (S/N<0)(AvgNoiseLevel)
  • Height of Center of Each Range Bin(Heights)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • Number of Spectral Averages(NumSpectralAverages)
  • Current Receiver Number(ReceiverNumber)
  • Receiver Mode(ReceiverMode)
  • Time offset of tweaks from base_time(time_offset)
  • Number of Receiver(NumReceivers)
  • Pulse Width(PulseWidth)
  • MMCR Reflectivity(Reflectivity)
  • Number of Gate Heights(NumHeights)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Radar Constant(RadarConstant)
  • lat(lat)
  • Receiver Cal Check Time Stamp(CalCheckTime)
  • Windowing ON-OFF Status(WindowingONOFF)
  • Receiver Cal Time Stamp(RxCalTimeStamp)
  • Max. height of clutter removal(ClutterHeight)
  • lon(lon)
  • Azimuth(Azimuth)
  • base time(base_time)
  • radar mode char identifier(ModeDescription)
  • Gate Spacing(GateSpacing)
  • Signal to Noise Ratio(SignalToNoiseRatio)
  • Delay to First Range Gate(StartGateDelay)
  • Number of Points in FFT(NumFFT)
  • Receiver 290K Level(Rx290KLevel)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • First Order Estimate of Spectral Count Calibration(CalibrationConstant)
  • Power (uncalibrated)(Power)
  • DC Filtering ON-OFF Status(DCFilterONOFF)
  • Receiver Gain(RxGain)
  • Dummy altitude for Zeb(alt)
nsammcrmomC1.b1:
  • Array of heights for each power(heights)
  • MMCR Reflectivity(Reflectivity)
  • MMCR Spectral Width(SpectralWidth)
  • TWT Status Code, details forthcoming from MMCR vendor(TWTStatusCode)
  • Time associated with hourly averaged values(TimeAvg)
  • DC Filtering ON-OFF Status(DCFilterONOFF)
  • radar mode char identifier(ModeDescription)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Data Quality Status(DataQualityStatus)
  • Gate Spacing(GateSpacing)
  • Receiver Cal Check Level(CalCheckLevel)
  • Minimum detectable reflectivity(MinimumDetectableReflectivity)
  • lat(lat)
  • lon(lon)
  • Mean Noise Level(NoiseLevel)
  • Power (uncalibrated)(Power)
  • Delay to First Range Gate(StartGateDelay)
  • Time offset of tweaks from base_time(time_offset)
  • Operating Set for this Record(ModeNum)
  • base time(base_time)
  • Dummy altitude for Zeb(alt)
  • Peak tranmitted power, averaged over the course of the hour(PeakTransmittedPowerAvg)
  • Number of Gate Heights(NumHeights)
  • Receiver Gain(RxGain)
  • Receiver Cal Time Stamp(RxCalTimeStamp)
  • time(time)
  • Average Noise Level (S/N<0)(AvgNoiseLevel)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Current Receiver Number(ReceiverNumber)
  • Max. height of clutter removal(ClutterHeight)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • Inter-Pulse Period(InterPulsePeriod)
  • Receiver 290K Level(Rx290KLevel)
  • Number of Code Bits(NumCodeBits)
  • Range Corrected Calibrated Power(RangeCorrectedPower)
  • Number of Receiver(NumReceivers)
  • Signal to Noise Ratio(SignalToNoiseRatio)
  • Radar Constant(RadarConstant)
  • Receiver Cal Check Time Stamp(CalCheckTime)
  • Windowing ON-OFF Status(WindowingONOFF)
  • Receiver Sky Noise(SkyNoiseLevel)
  • Number of Points in FFT(NumFFT)
  • Circular Depolarization Ratio(CircularDepolarizationRatio)
  • Receiver Mode(ReceiverMode)
  • Number of Spectral Averages(NumSpectralAverages)
  • Pulse Width(PulseWidth)

Back To Table of Contents


END OF DATA