SGP/MMCR/C1 - TWTA Faulting

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.

• 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)

• Raw data stream - documentation not supported(raw)

• 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)

SGP/MMCR/C1 - Sensitivity Shift

There was a sensitivity shift on the MMCR during this period of time.  Cycling the power 
cleared the problem. Do not use data.

• 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)

SGP/MMCR/C1 - Polarization Mode Problem

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.

• MMCR Mean Doppler Velocity(MeanDopplerVelocity)
• Signal to Noise Ratio(SignalToNoiseRatio)
• MMCR Reflectivity(Reflectivity)
• MMCR Spectral Width(SpectralWidth)

• MMCR Mean Doppler Velocity(MeanDopplerVelocity)
• MMCR Spectral Width(SpectralWidth)
• MMCR Reflectivity(Reflectivity)