DQR ID | Subject | Data Streams Affected |
---|
D060629.1 | TWP/MMCR/C3 - Diminished Reflectivity Sensitivity | twpmmcrmomC3.b1, twpmmcrspecmomC3.a0 |
D060713.2 | TWP/MMCR/C1 - Reprocess: Reflectivities too high | twpmmcrmomC1.b1 |
D070112.1 | TWP/MMCR/C1 - Reprocess: Height Error | twpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0 |
D070112.3 | TWP/MMCR/C3 - Reprocess: Height Error | twpmmcrmomC3.00, twpmmcrmomC3.b1, twpmmcrspecmomC3.a0 |
D070125.1 | TWP/MMCR/C1 - Phase lock faults | twpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0 |
D070129.1 | TWP/MMCR/C1 - Error in recorded heights | twpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0 |
D070131.1 | TWP/MMCR/C1 - Receiver locked up | twpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0 |
D070705.2 | TWP/MMCR/C1 - Receiver Lockup | twpmmcrmomC1.b1, twpmmcrspecmomC1.a0 |
D071204.5 | TWP/MMCR/C3 - Receiver switch lock-up | twpmmcrmomC3.00, twpmmcrmomC3.b1, twpmmcrspecmomC3.a0 |
D081210.14 | TWP/MMCR/C1 - Reduced sensitivity due to LNA failure | twpmmcrspecmomC1.a0, twpmmcrmomC1.b1 |
D090611.4 | TWP/MMCR/C1 - Pulse Controller Problem | twpmmcrmomC1.b1, twpmmcrspecmomC1.a0 |
D110304.1 | TWP/MMCR/C3 - Antenna gain/beamwidth uncertainty | twpmmcrmomC3.00, twpmmcrmomC3.b1, twpmmcrspecmomC3.a0 |
Subject: | TWP/MMCR/C3 - Diminished Reflectivity Sensitivity |
DataStreams: | twpmmcrmomC3.b1, twpmmcrspecmomC3.a0
|
Description: | Radar sensitivity was diminished by approximately 15 - 20 dBZ during
this period. The result is that upper level cloud tops may be missed
and thin clouds, particularly thin cirrus, may not be detected during
this period. Reflectivity was correctly calibrated, so values are
correct where signals were detected. The problem was caused by
lightning damage to the low noise amplifier (LNA). The LNA was replaced
on 20060718. |
Measurements: | twpmmcrmomC3.b1: - CalCheckLevel
- RxGain
- Rx290KLevel
- MinimumDetectableReflectivity
- RadarConstant
- SkyNoiseLevel
- RangeCorrectedPower
- Cloud, reflectivity, at altitude(Reflectivity)
twpmmcrspecmomC3.a0: - RxGain
- CalCheckLevel
- Rx290KLevel
- SkyNoiseLevel
- MinimumDetectableReflectivity
- CalibrationConstant
- RadarConstant
|
Subject: | TWP/MMCR/C1 - Phase lock faults |
DataStreams: | twpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0
|
Description: | Phase lock faults on the coherent up/down converter (CUDC) caused a receiver failure.
Cycling the power on the CUDC brought the MMCR back to normal operation. |
Measurements: | twpmmcrspecmomC1.a0: - RxGain
- Rx290KLevel
- Power
- NumFFT
- MinimumDetectableReflectivity
- SkyNoiseLevel
- DCFilterONOFF
- WindowingONOFF
- RadarConstant
- Heights
- AvgNoiseLevel
- lon
- InterPulsePeriod
- NyquistVelocity
- PulseWidth
- NumCodeBits
- CalibrationConstant
- Cloud, reflectivity, at altitude(Reflectivity)
- Azimuth
- GateSpacing
- NumCoherentIntegrations
- ReceiverNumber
- CircularDepolarizationRatio
- ModeDescription
- Elevation
- NumHeights
- ClutterHeight
- ReceiverMode
- CalCheckTime
- DataQualityStatus
- SignalToNoiseRatio
- RangeCorrectedPower
- NoiseLevel
- MMCR Mean Doppler Velocity(MeanDopplerVelocity)
- MMCR Spectral Width(SpectralWidth)
- lat
- alt
- CalCheckLevel
- NumSpectralAverages
- RxCalTimeStamp
- NumReceivers
- base_time
- ModeNum
- StartGateDelay
- time_offset
- Cloud, doppler spectrum, at altitude, 8-mm radar(Spectra)
twpmmcrmomC1.b1: - MMCR Mean Doppler Velocity(MeanDopplerVelocity)
- time
- WindowingONOFF
- lon
- MMCR Spectral Width(SpectralWidth)
- Cloud, reflectivity, at altitude(Reflectivity)
- time_offset
- ReceiverMode
- DCFilterONOFF
- ReceiverNumber
- SkyNoiseLevel
- heights
- NumFFT
- NyquistVelocity
- TimeAvg
- RadarConstant
- ClutterHeight
- NumHeights
- RangeCorrectedPower
- MinimumDetectableReflectivity
- ModeNum
- CalCheckLevel
- Power
- base_time
- PulseWidth
- lat
- InterPulsePeriod
- Rx290KLevel
- DataQualityStatus
- RxCalTimeStamp
- NumSpectralAverages
- CircularDepolarizationRatio
- NumCoherentIntegrations
- SignalToNoiseRatio
- PeakTransmittedPowerAvg
- AvgNoiseLevel
- NoiseLevel
- CalCheckTime
- GateSpacing
- ModeDescription
- RxGain
- StartGateDelay
- alt
- NumCodeBits
- TWTStatusCode
- NumReceivers
twpmmcrmomC1.00: - AVHRR satellite images for Darwin from BOM (RAW)(raw)
|
Subject: | TWP/MMCR/C1 - Receiver locked up |
DataStreams: | twpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0
|
Description: | The MMCR receiver "locked up" and was not receiving during this period. |
Measurements: | twpmmcrspecmomC1.a0: - RxGain
- Rx290KLevel
- Power
- NumFFT
- MinimumDetectableReflectivity
- SkyNoiseLevel
- DCFilterONOFF
- WindowingONOFF
- RadarConstant
- Heights
- AvgNoiseLevel
- lon
- InterPulsePeriod
- NyquistVelocity
- PulseWidth
- NumCodeBits
- CalibrationConstant
- Cloud, reflectivity, at altitude(Reflectivity)
- Azimuth
- GateSpacing
- NumCoherentIntegrations
- ReceiverNumber
- CircularDepolarizationRatio
- ModeDescription
- Elevation
- NumHeights
- ClutterHeight
- ReceiverMode
- CalCheckTime
- DataQualityStatus
- SignalToNoiseRatio
- RangeCorrectedPower
- NoiseLevel
- MMCR Mean Doppler Velocity(MeanDopplerVelocity)
- MMCR Spectral Width(SpectralWidth)
- lat
- alt
- CalCheckLevel
- NumSpectralAverages
- RxCalTimeStamp
- NumReceivers
- base_time
- ModeNum
- StartGateDelay
- time_offset
- Cloud, doppler spectrum, at altitude, 8-mm radar(Spectra)
twpmmcrmomC1.b1: - MMCR Mean Doppler Velocity(MeanDopplerVelocity)
- time
- WindowingONOFF
- lon
- MMCR Spectral Width(SpectralWidth)
- Cloud, reflectivity, at altitude(Reflectivity)
- time_offset
- ReceiverMode
- DCFilterONOFF
- ReceiverNumber
- SkyNoiseLevel
- heights
- NumFFT
- NyquistVelocity
- TimeAvg
- RadarConstant
- ClutterHeight
- NumHeights
- RangeCorrectedPower
- MinimumDetectableReflectivity
- ModeNum
- CalCheckLevel
- Power
- base_time
- PulseWidth
- lat
- InterPulsePeriod
- Rx290KLevel
- DataQualityStatus
- RxCalTimeStamp
- NumSpectralAverages
- CircularDepolarizationRatio
- NumCoherentIntegrations
- SignalToNoiseRatio
- PeakTransmittedPowerAvg
- AvgNoiseLevel
- NoiseLevel
- CalCheckTime
- GateSpacing
- ModeDescription
- RxGain
- StartGateDelay
- alt
- NumCodeBits
- TWTStatusCode
- NumReceivers
twpmmcrmomC1.00: - AVHRR satellite images for Darwin from BOM (RAW)(raw)
|
Subject: | TWP/MMCR/C1 - Receiver Lockup |
DataStreams: | twpmmcrmomC1.b1, twpmmcrspecmomC1.a0
|
Description: | The receiver locked up resulting in useless data. The problem was corrected when the
computer was rebooted. |
Measurements: | twpmmcrspecmomC1.a0: - RxGain
- Rx290KLevel
- Power
- NumFFT
- MinimumDetectableReflectivity
- SkyNoiseLevel
- DCFilterONOFF
- WindowingONOFF
- RadarConstant
- Heights
- AvgNoiseLevel
- lon
- InterPulsePeriod
- NyquistVelocity
- PulseWidth
- NumCodeBits
- CalibrationConstant
- Cloud, reflectivity, at altitude(Reflectivity)
- Azimuth
- GateSpacing
- NumCoherentIntegrations
- ReceiverNumber
- CircularDepolarizationRatio
- ModeDescription
- Elevation
- NumHeights
- ClutterHeight
- ReceiverMode
- CalCheckTime
- DataQualityStatus
- SignalToNoiseRatio
- RangeCorrectedPower
- NoiseLevel
- MMCR Mean Doppler Velocity(MeanDopplerVelocity)
- MMCR Spectral Width(SpectralWidth)
- lat
- alt
- CalCheckLevel
- NumSpectralAverages
- RxCalTimeStamp
- NumReceivers
- base_time
- ModeNum
- StartGateDelay
- time_offset
- Cloud, doppler spectrum, at altitude, 8-mm radar(Spectra)
twpmmcrmomC1.b1: - MMCR Mean Doppler Velocity(MeanDopplerVelocity)
- time
- WindowingONOFF
- lon
- MMCR Spectral Width(SpectralWidth)
- Cloud, reflectivity, at altitude(Reflectivity)
- time_offset
- ReceiverMode
- DCFilterONOFF
- ReceiverNumber
- SkyNoiseLevel
- heights
- NumFFT
- NyquistVelocity
- TimeAvg
- RadarConstant
- ClutterHeight
- NumHeights
- RangeCorrectedPower
- MinimumDetectableReflectivity
- ModeNum
- CalCheckLevel
- Power
- base_time
- PulseWidth
- lat
- InterPulsePeriod
- Rx290KLevel
- DataQualityStatus
- RxCalTimeStamp
- NumSpectralAverages
- CircularDepolarizationRatio
- NumCoherentIntegrations
- SignalToNoiseRatio
- PeakTransmittedPowerAvg
- AvgNoiseLevel
- NoiseLevel
- CalCheckTime
- GateSpacing
- ModeDescription
- RxGain
- StartGateDelay
- alt
- NumCodeBits
- TWTStatusCode
- NumReceivers
|
Subject: | TWP/MMCR/C3 - Receiver switch lock-up |
DataStreams: | twpmmcrmomC3.00, twpmmcrmomC3.b1, twpmmcrspecmomC3.a0
|
Description: | During the troubleshooting of another intermittent problem, a receiver switch latched up
in an open position making the data unusable. |
Measurements: | twpmmcrmomC3.b1: - CalCheckTime
- GateSpacing
- InterPulsePeriod
- StartGateDelay
- RxGain
- SkyNoiseLevel
- NoiseLevel
- MMCR Spectral Width(SpectralWidth)
- time_offset
- NumHeights
- CalCheckLevel
- NumFFT
- WindowingONOFF
- ClutterHeight
- ReceiverNumber
- RxCalTimeStamp
- NyquistVelocity
- Rx290KLevel
- MinimumDetectableReflectivity
- RadarConstant
- TWTStatusCode
- NumReceivers
- Cloud, reflectivity, at altitude(Reflectivity)
- CircularDepolarizationRatio
- Power
- MMCR Mean Doppler Velocity(MeanDopplerVelocity)
- time
- heights
- ReceiverMode
- ModeNum
- AvgNoiseLevel
- base_time
- NumSpectralAverages
- RangeCorrectedPower
- alt
- PeakTransmittedPowerAvg
- DataQualityStatus
- TimeAvg
- SignalToNoiseRatio
- NumCoherentIntegrations
- lat
- lon
- PulseWidth
- ModeDescription
- NumCodeBits
- DCFilterONOFF
twpmmcrspecmomC3.a0: - NumReceivers
- DCFilterONOFF
- PulseWidth
- ModeDescription
- NumCodeBits
- SkyNoiseLevel
- Elevation
- MinimumDetectableReflectivity
- time_offset
- ModeNum
- lat
- InterPulsePeriod
- ReceiverNumber
- NumFFT
- CalCheckLevel
- CalibrationConstant
- DataQualityStatus
- StartGateDelay
- Heights
- ReceiverMode
- RxGain
- WindowingONOFF
- base_time
- RxCalTimeStamp
- alt
- NumSpectralAverages
- lon
- NyquistVelocity
- Azimuth
- NumHeights
- Cloud, doppler spectrum, at altitude, 8-mm radar(Spectra)
- Rx290KLevel
- ClutterHeight
- CalCheckTime
- RadarConstant
- NumCoherentIntegrations
- GateSpacing
twpmmcrmomC3.00: - AVHRR satellite images for Darwin from BOM (RAW)(raw)
|
Subject: | TWP/MMCR/C1 - Reduced sensitivity due to LNA failure |
DataStreams: | twpmmcrspecmomC1.a0, twpmmcrmomC1.b1
|
Description: | The low noise amplifier (LNA) failed resulting in a loss of approximately 26 dB of
receiver gain and sensitivity.
The reflectivity values should be correct but sensitivity is reduced. |
Measurements: | twpmmcrspecmomC1.a0: - Rx290KLevel
- RxGain
- Power
- NumFFT
- MinimumDetectableReflectivity
- SkyNoiseLevel
- DCFilterONOFF
- RadarConstant
- WindowingONOFF
- Heights
- AvgNoiseLevel
- InterPulsePeriod
- lon
- NyquistVelocity
- PulseWidth
- NumCodeBits
- CalibrationConstant
- Cloud, reflectivity, at altitude(Reflectivity)
- Azimuth
- GateSpacing
- NumCoherentIntegrations
- ReceiverNumber
- CircularDepolarizationRatio
- ModeDescription
- Elevation
- NumHeights
- ClutterHeight
- ReceiverMode
- CalCheckTime
- DataQualityStatus
- RangeCorrectedPower
- MMCR Mean Doppler Velocity(MeanDopplerVelocity)
- NoiseLevel
- SignalToNoiseRatio
- MMCR Spectral Width(SpectralWidth)
- alt
- lat
- CalCheckLevel
- NumSpectralAverages
- RxCalTimeStamp
- NumReceivers
- ModeNum
- base_time
- StartGateDelay
- Cloud, doppler spectrum, at altitude, 8-mm radar(Spectra)
- time_offset
twpmmcrmomC1.b1: - MMCR Mean Doppler Velocity(MeanDopplerVelocity)
- time
- WindowingONOFF
- lon
- MMCR Spectral Width(SpectralWidth)
- Cloud, reflectivity, at altitude(Reflectivity)
- time_offset
- ReceiverMode
- DCFilterONOFF
- ReceiverNumber
- SkyNoiseLevel
- heights
- NumFFT
- NyquistVelocity
- TimeAvg
- RadarConstant
- ClutterHeight
- NumHeights
- RangeCorrectedPower
- MinimumDetectableReflectivity
- ModeNum
- CalCheckLevel
- Power
- base_time
- PulseWidth
- lat
- InterPulsePeriod
- Rx290KLevel
- DataQualityStatus
- RxCalTimeStamp
- NumSpectralAverages
- CircularDepolarizationRatio
- NumCoherentIntegrations
- SignalToNoiseRatio
- PeakTransmittedPowerAvg
- AvgNoiseLevel
- CalCheckTime
- NoiseLevel
- ModeDescription
- GateSpacing
- RxGain
- StartGateDelay
- alt
- NumCodeBits
- TWTStatusCode
- NumReceivers
|
Subject: | TWP/MMCR/C1 - Pulse Controller Problem |
DataStreams: | twpmmcrmomC1.b1, twpmmcrspecmomC1.a0
|
Description: | The power cable to the MMCR pulse controller was inadvertently unplugged during a spectra
disk change out. |
Measurements: | twpmmcrspecmomC1.a0: - RxGain
- Rx290KLevel
- Power
- NumFFT
- MinimumDetectableReflectivity
- SkyNoiseLevel
- DCFilterONOFF
- WindowingONOFF
- RadarConstant
- Heights
- AvgNoiseLevel
- lon
- InterPulsePeriod
- NyquistVelocity
- PulseWidth
- NumCodeBits
- CalibrationConstant
- Cloud, reflectivity, at altitude(Reflectivity)
- Azimuth
- GateSpacing
- NumCoherentIntegrations
- ReceiverNumber
- CircularDepolarizationRatio
- ModeDescription
- Elevation
- NumHeights
- ClutterHeight
- ReceiverMode
- CalCheckTime
- DataQualityStatus
- SignalToNoiseRatio
- RangeCorrectedPower
- NoiseLevel
- MMCR Mean Doppler Velocity(MeanDopplerVelocity)
- MMCR Spectral Width(SpectralWidth)
- lat
- alt
- CalCheckLevel
- NumSpectralAverages
- RxCalTimeStamp
- NumReceivers
- base_time
- ModeNum
- StartGateDelay
- time_offset
- Cloud, doppler spectrum, at altitude, 8-mm radar(Spectra)
twpmmcrmomC1.b1: - MMCR Mean Doppler Velocity(MeanDopplerVelocity)
- time
- WindowingONOFF
- lon
- MMCR Spectral Width(SpectralWidth)
- Cloud, reflectivity, at altitude(Reflectivity)
- time_offset
- ReceiverMode
- DCFilterONOFF
- ReceiverNumber
- SkyNoiseLevel
- heights
- NumFFT
- NyquistVelocity
- TimeAvg
- RadarConstant
- ClutterHeight
- NumHeights
- RangeCorrectedPower
- MinimumDetectableReflectivity
- ModeNum
- CalCheckLevel
- Power
- base_time
- PulseWidth
- lat
- InterPulsePeriod
- Rx290KLevel
- DataQualityStatus
- RxCalTimeStamp
- NumSpectralAverages
- CircularDepolarizationRatio
- NumCoherentIntegrations
- SignalToNoiseRatio
- PeakTransmittedPowerAvg
- AvgNoiseLevel
- NoiseLevel
- CalCheckTime
- GateSpacing
- ModeDescription
- RxGain
- StartGateDelay
- alt
- NumCodeBits
- TWTStatusCode
- NumReceivers
|
Subject: | TWP/MMCR/C3 - Antenna gain/beamwidth uncertainty |
DataStreams: | twpmmcrmomC3.00, twpmmcrmomC3.b1, twpmmcrspecmomC3.a0
|
Description: | Upon installing the KAZR at Darwin, we found that the antenna's subreflector was loose.
Based on measurements from the manufacturer, a 0.001" change can change the antenna gain
of approximately 1 dB. This adds an uncertainty of 2 dBZ reflectivity measurements. We
measured slightly more than 0.100" off nominal position. However the manufacturer does
not measure the subreflector location for each antenna so we do not know how far off, if at
all, the subreflector is from its position when it was characterized at the test range.
We have contacted CSIRO and are investigating the possibility of sending the antenna to
their near-field antenna test range. In several months we will also have a Ka-SACR at
Darwin that will enable us to do a cross-calibration. |
Measurements: | twpmmcrmomC3.b1: - RadarConstant
- RangeCorrectedPower
- Cloud, reflectivity, at altitude(Reflectivity)
twpmmcrspecmomC3.a0: - CalibrationConstant
- RadarConstant
twpmmcrmomC3.00: - AVHRR satellite images for Darwin from BOM (RAW)(raw)
|