Data Quality Reports for Session: 126470 User: wwu Completed: 03/01/2010

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D020927.1SGP/ARSCL/C1 - ARSCL Cloud Bases and Low-level reflectivitiessgparscl1clothC1.c1, sgparsclbnd1clothC1.c1, sgparsclcbh1clothC1.c1
D050222.2SGP/MMCR/C1 - Power supply failuresgparscl1clothC1.c1, sgparsclbnd1clothC1.c1, sgpmmcrmomC1.00, sgpmmcrmomC1.b1,
sgpmmcrspectraC1.a0


DQRID : D020927.1
Start DateStart TimeEnd DateEnd Time
12/01/1996000002/04/20002359
Subject:
SGP/ARSCL/C1 - ARSCL Cloud Bases and Low-level reflectivities
DataStreams:sgparscl1clothC1.c1, sgparsclbnd1clothC1.c1, sgparsclcbh1clothC1.c1
Description:
Prior to February 4, 2000, the ARSCL data set incorporated data from the
Beaufort Laser Ceilometer as one of its inputs.  Because of the BLC's
high spatial resolution, this data was often chosen by ARSCL as the
"CloudBaseBestEstimate" for boundary layer clouds. It was subsequently
determined that the BLC cloud base was biased, with the BLC reporting
cloud base heights that are 122 meters too high.

The bias error will be corrected when the entire ARSCL data set is
reprocessed as part of release_4.  (The release version number is included
the the netCDF global comments).   This reprocessing will also include a
small correction the the MMCR near-field reflectivities.  This correction
is less than 1 dB except for hydrometers within 200 meters of the surface.

Thanks to Roger Marchand for helping bracket this problem.
Measurements:sgparsclbnd1clothC1.c1:
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
sgparscl1clothC1.c1:
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • MMCR Reflectivity(Reflectivity)
  • MMCR Best Estimate of Hydrometeor Reflectivity(ReflectivityBestEstimate)
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
sgparsclcbh1clothC1.c1:
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)

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

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