DQRs for Session: 141217 User:irene75Completed: 03-20-2012

Data Quality Reports for Session: 141217 User: irene75 Completed: 03/20/2012

TABLE OF CONTENTS

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

DQRID : D060629.1

Start Date	Start Time	End Date	End Time
12/02/2005	0000	07/18/2006	2359

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

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DQRID : D060713.2

Start Date	Start Time	End Date	End Time
06/16/2006	0300	06/20/2006	2100

Subject:	TWP/MMCR/C1 - Reprocess: Reflectivities too high
DataStreams:	twpmmcrmomC1.b1
Description:	After the upgrade to PIRAQ-III, the reflectivies are too high by ~ 23 dBZ. The problem was caused by a failure of one of the power supplies that turned off one of the rf switches. The data can be used but 23 dB should be subtracted from the reported values. Due to the unknown exact isolation the rf switch offers, one should assume that the reflectivity will then be accurate to +/- 3 dBZ.
Measurements:	twpmmcrmomC1.b1: Cloud, reflectivity, at altitude(Reflectivity)

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DQRID : D070112.1

Start Date	Start Time	End Date	End Time
06/16/2006	0300	01/11/2007	1620

Subject:	TWP/MMCR/C1 - Reprocess: Height Error
DataStreams:	twpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0
Description:	A timing error was found in the PIRAQ MMCR's. It resulted in recorded heights being too high for each radar mode by the following amounts: Mode 1: 24.8756 m too high Mode 2: 25.6249 m too high Mode 3: 33.1176 m too high Mode 4: 33.1176 m too high Range gate spacing was not affected.
Measurements:	twpmmcrspecmomC1.a0: Heights twpmmcrmomC1.b1: heights twpmmcrmomC1.00: AVHRR satellite images for Darwin from BOM (RAW)(raw)

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DQRID : D070112.3

Start Date	Start Time	End Date	End Time
11/04/2005	0500	01/10/2007	2000

Subject:	TWP/MMCR/C3 - Reprocess: Height Error
DataStreams:	twpmmcrmomC3.00, twpmmcrmomC3.b1, twpmmcrspecmomC3.a0
Description:	A timing error was found in the PIRAQ MMCR's. It resulted in recorded heights being too high for each radar mode by the following amounts: Mode 1: 24.8756 m too high Mode 2: 25.6249 m too high Mode 3: 33.1176 m too high Mode 4: 33.1176 m too high Range gate spacing was not affected.
Measurements:	twpmmcrmomC3.b1: heights twpmmcrspecmomC3.a0: Heights twpmmcrmomC3.00: AVHRR satellite images for Darwin from BOM (RAW)(raw)

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DQRID : D070125.1

Start Date	Start Time	End Date	End Time
01/25/2007	0630	01/25/2007	1525

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)

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DQRID : D070129.1

Start Date	Start Time	End Date	End Time
06/16/2006	0300	11/28/2006	2359

Subject:	TWP/MMCR/C1 - Error in recorded heights
DataStreams:	twpmmcrmomC1.00, twpmmcrmomC1.b1, twpmmcrspecmomC1.a0
Description:	An error in MMCR configuration resulted in a timing error. This caused erroneous height values (too large) to be recorded in the data files.
Measurements:	twpmmcrspecmomC1.a0: Heights twpmmcrmomC1.b1: heights twpmmcrmomC1.00: AVHRR satellite images for Darwin from BOM (RAW)(raw)

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DQRID : D070131.1

Start Date	Start Time	End Date	End Time
01/27/2007	2200	01/31/2007	0100

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)

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DQRID : D070705.2

Start Date	Start Time	End Date	End Time
06/20/2007	1300	06/25/2007	1700

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

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DQRID : D071204.5

Start Date	Start Time	End Date	End Time
10/30/2007	0300	11/05/2007	1900

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)

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DQRID : D081210.14

Start Date	Start Time	End Date	End Time
12/10/2008	0000	02/04/2009	1515

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

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DQRID : D090611.4

Start Date	Start Time	End Date	End Time
05/23/2009	1100	05/30/2009	0600

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

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DQRID : D110304.1

Start Date	Start Time	End Date	End Time
01/29/2010	0430	02/27/2011	0600

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)

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