DQRID : D101108.5
Start DateStart TimeEnd DateEnd Time Data Quality Metric
10/19/2010024510/21/20101700Incorrect
more
Subject:
SGP/MMCR/C1 - Noise Level Shift
DataStreams:sgpmmcrspecmomC1.a0, sgpmmcrmomC1.b1
Description:
The MMCR experienced an extreme noise level shift.  Since we were not on-site to 
troubleshoot this problem, we are unable to pinpoint its actual cause but rebooting the system 
returned the MMCR to normal operation.  We speculate that the problem is with one of the 
receiver protection switches latching in an isolated position.  If this is what is 
happening, the problem can be in the switch itself, its driver, or the timing circuitry 
controlling the driver.  This error happens occasionally at all MMCRs but is more frequent at the 
SGP radar.
Suggestions: 
Do not use the data during this period.
Measurements:sgpmmcrmomC1.b1:
  • NumCodeBits
  • base_time
  • ReceiverMode
  • ReceiverNumber
  • MinimumDetectableReflectivity
  • Rx290KLevel
  • InterPulsePeriod
  • NumReceivers
  • ClutterHeight
  • alt
  • CircularDepolarizationRatio
  • StartGateDelay
  • time
  • CalCheckTime
  • TimeAvg
  • lat
  • AvgNoiseLevel
  • Power
  • PulseWidth
  • TWTStatusCode
  • ModeDescription
  • lon
  • GateSpacing
  • RadarConstant
  • CalCheckLevel
  • MeanDopplerVelocity
  • NoiseLevel
  • ModeNum
  • NumSpectralAverages
  • SpectralWidth
  • NumFFT
  • DataQualityStatus
  • SkyNoiseLevel
  • NumCoherentIntegrations
  • RangeCorrectedPower
  • time_offset
  • WindowingONOFF
  • Reflectivity
  • DCFilterONOFF
  • NumHeights
  • heights
  • NyquistVelocity
  • SignalToNoiseRatio
  • PeakTransmittedPowerAvg
  • RxCalTimeStamp
  • RxGain
more
sgpmmcrspecmomC1.a0:
  • RxGain
  • base_time
  • time_offset
  • NumHeights
  • lon
  • DCFilterONOFF
  • CalibrationConstant
  • PulseWidth
  • Azimuth
  • CircularDepolarizationRatio
  • NoiseLevel
  • InterPulsePeriod
  • ReceiverMode
  • WindowingONOFF
  • SkyNoiseLevel
  • Power
  • Heights
  • RxCalTimeStamp
  • ModeNum
  • RangeCorrectedPower
  • SpectralWidth
  • CalCheckTime
  • Elevation
  • NumSpectralAverages
  • GateSpacing
  • NumReceivers
  • StartGateDelay
  • Rx290KLevel
  • MinimumDetectableReflectivity
  • NyquistVelocity
  • ClutterHeight
  • RadarConstant
  • NumCodeBits
  • CalCheckLevel
  • Spectra
  • MeanDopplerVelocity
  • AvgNoiseLevel
  • lat
  • DataQualityStatus
  • ReceiverNumber
  • ModeDescription
  • Reflectivity
  • SignalToNoiseRatio
  • NumCoherentIntegrations
  • NumFFT
  • alt
more

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