DQRID : D030707.1
Start DateStart TimeEnd DateEnd Time
06/28/2003190007/06/20032359
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Subject:
SGP/MMCR/C1 - Transmitter tube faults
DataStreams:sgpmmcrmomentsC1.a1, sgpmmcrcalC1.00, sgpmmcrcalC1.a1, sgpmmcrmomentsC1.00
Description:
The transmitter tube was replaced and the new tube began exhibiting helix current faults.  
During the period of time covered by this DQR, there were extensive data gaps when the 
TWTA quit transmitting due to the helix current faults. This TWTA was removed and sent 
back to the vendor for repair.  The TWTA that was in prior use was reinstalled.
Suggestions: 
Do not use MMCR data during this period.
Measurements:sgpmmcrmomentsC1.a1:
  • Calculated Noise(Noise)
  • base time in epoch(base_time)
  • Range Heights (center of radar sample volume)(Heights)
  • Rx bandwidtch switch code(Switch)
  • Pulse Width(PulseWidth)
  • Delay through Rx(Delay)
  • Delay to First Range Gate(StartGateDelay)
  • Number of Spectra Averaged(NumSpectraAveraged)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • Gate Spacing(GateSpacing)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Time offset from base_time(time_offset)
  • Number of Ffts(NumFft)
  • lon(lon)
  • Inter-Pulse Period(InterPulsePeriod)
  • Signal to Noise Ratio(SignalToNoiseRatio)
  • North Latitude(lat)
  • Number of Range Gates(NumHeights)
  • 10000 * [MeanDopperVelocity(m/s) / NyquistVelocity(m/s)](MeanDopplerValue)
  • 10000 * [SpectralWidth(m/s) / NyquistVelocity(m/s)](SpectralWidthValue)
  • Number of Code Bits(NumCodeBits)
  • -180.0 - +180.0(alt)
more
sgpmmcrmomentsC1.00:
  • (Raw data stream - documentation not supported)
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sgpmmcrcalC1.a1:
  • -180.0 - +180.0(alt)
  • North Latitude(lat)
  • Transmitter Path Loss(TransmitterPathLoss)
  • Peak Transmitted Power(PeakTransmittedPower)
  • Receiver Calib Noise Crv Cal. Power Values(RxCalibrationNoiseCrv)
  • Range Corrected, Calibrated Power(RangeCorrectedCalibratedPower)
  • Circulator #1 Attenuation(CirculatorAttenuation1)
  • lon(lon)
  • Reflectivity(Reflectivity)
  • Number of Spectra Averaged(NumSpectraAveraged)
  • Range Heights (center of radar sample volume)(Heights)
  • Gate Spacing(GateSpacing)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Number of Ffts(NumFft)
  • Pulse Width(PulseWidth)
  • Receiver Path Loss(ReceiverPathLoss)
  • base time in epoch(base_time)
  • Partial Decoding Loss(PartialDecodingLoss)
  • Time offset from base_time(time_offset)
  • Delay to First Range Gate(StartGateDelay)
  • Receiver Cal Noise Crv Sig Power Values(RxCalibrationNoiseCrvSignal)
  • Inter-Pulse Period(InterPulsePeriod)
  • Coded Pulse Loss(CodedPulseLoss)
  • Number of Range Gates(NumHeights)
  • Number of Code Bits(NumCodeBits)
more
sgpmmcrcalC1.00:
  • (Raw data stream - documentation not supported)
more

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