DQRs for Session: 130879 User:mskulieCompleted: 10-14-2010

Data Quality Reports for Session: 130879 User: mskulie Completed: 10/14/2010

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D060803.1	NSA/MMCR/C1 - Sensitivity Loss, Calibration Wrong	nsammcrmomC1.00, nsammcrmomC1.b1, nsammcrspecmomC1.a0
D061211.1	NSA/MMCR/C1 - MMCR TWTA Failure	nsammcrmomC1.00, nsammcrmomC1.b1, nsammcrspecmomC1.a0
D061213.1	NSA/METTWR/C1 - CMH Sensor Calibrated Incorrectly	nsamettwr4hC1.b1
D061213.2	NSA/METTWR/C1 - 40m wind sensor heater failure	nsamettwr4hC1.b1
D070226.1	NSA/METTWR/C1 - 40m Wind Direction Data Suspect	nsamettwr4hC1.b1
D070529.1	NSA/METTWR/C1 - 20m RH Data Questionable	nsamettwr4hC1.b1
D070716.4	NSA/MMCR/C1 - Antenna Feed Corrosion	nsammcrmomC1.b1, nsammcrspecmomC1.a0

DQRID : D060803.1

Start Date	Start Time	End Date	End Time
08/01/2005	0000	02/01/2007	2359

Subject:	NSA/MMCR/C1 - Sensitivity Loss, Calibration Wrong
DataStreams:	nsammcrmomC1.00, nsammcrmomC1.b1, nsammcrspecmomC1.a0
Description:	Jay Mace compared data from CLOUDSAT to the MMCR and found significant discrepancies. It appears that the MMCR has a sensitivity problem and is underreporting reflectivity by ~20 dBZ. A comparison with the MPL shows that this might be a gradual degradation, i.e. there are no apparent shifts identifying when this might have occured.
Measurements:	nsammcrmomC1.b1: TimeAvg DataQualityStatus StartGateDelay NumSpectralAverages SkyNoiseLevel RangeCorrectedPower base_time time_offset RadarConstant InterPulsePeriod lat alt MMCR Mean Doppler Velocity(MeanDopplerVelocity) NumCodeBits PeakTransmittedPowerAvg NyquistVelocity ReceiverNumber MMCR Spectral Width(SpectralWidth) Cloud, reflectivity, at altitude(Reflectivity) NumHeights heights TWTStatusCode Power NumFFT ReceiverMode AvgNoiseLevel RxGain NoiseLevel SignalToNoiseRatio Rx290KLevel ClutterHeight DCFilterONOFF CalCheckTime WindowingONOFF lon ModeDescription time RxCalTimeStamp CalCheckLevel NumReceivers CircularDepolarizationRatio NumCoherentIntegrations ModeNum PulseWidth MinimumDetectableReflectivity GateSpacing nsammcrspecmomC1.a0: NumSpectralAverages MMCR Mean Doppler Velocity(MeanDopplerVelocity) StartGateDelay Elevation CircularDepolarizationRatio InterPulsePeriod NumFFT NumCodeBits MinimumDetectableReflectivity time_offset Power Heights NumReceivers NoiseLevel ModeDescription SkyNoiseLevel ModeNum lon RxCalTimeStamp Rx290KLevel CalCheckLevel DataQualityStatus alt base_time CalibrationConstant RadarConstant SignalToNoiseRatio ReceiverNumber CalCheckTime NumHeights ReceiverMode NyquistVelocity AvgNoiseLevel MMCR Spectral Width(SpectralWidth) Azimuth WindowingONOFF ClutterHeight PulseWidth Cloud, doppler spectrum, at altitude, 8-mm radar(Spectra) NumCoherentIntegrations RxGain RangeCorrectedPower Cloud, reflectivity, at altitude(Reflectivity) DCFilterONOFF GateSpacing lat nsammcrmomC1.00: C-Band Polarimetric Radar Data for Darwin, from BOM (RAW)(raw)

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DQRID : D061211.1

Start Date	Start Time	End Date	End Time
11/05/2005	0100	02/01/2007	2359

Subject:	NSA/MMCR/C1 - MMCR TWTA Failure
DataStreams:	nsammcrmomC1.00, nsammcrmomC1.b1, nsammcrspecmomC1.a0
Description:	The TWTA is no longer transmitting.
Measurements:	nsammcrmomC1.b1: TimeAvg DataQualityStatus StartGateDelay NumSpectralAverages SkyNoiseLevel RangeCorrectedPower base_time time_offset RadarConstant InterPulsePeriod lat alt MMCR Mean Doppler Velocity(MeanDopplerVelocity) NumCodeBits PeakTransmittedPowerAvg NyquistVelocity ReceiverNumber MMCR Spectral Width(SpectralWidth) Cloud, reflectivity, at altitude(Reflectivity) NumHeights heights TWTStatusCode Power NumFFT ReceiverMode AvgNoiseLevel RxGain NoiseLevel SignalToNoiseRatio Rx290KLevel ClutterHeight DCFilterONOFF CalCheckTime WindowingONOFF lon ModeDescription time RxCalTimeStamp CalCheckLevel NumReceivers CircularDepolarizationRatio NumCoherentIntegrations ModeNum PulseWidth MinimumDetectableReflectivity GateSpacing nsammcrspecmomC1.a0: NumSpectralAverages MMCR Mean Doppler Velocity(MeanDopplerVelocity) StartGateDelay Elevation CircularDepolarizationRatio InterPulsePeriod NumFFT NumCodeBits MinimumDetectableReflectivity time_offset Power Heights NumReceivers NoiseLevel ModeDescription SkyNoiseLevel ModeNum lon RxCalTimeStamp Rx290KLevel CalCheckLevel DataQualityStatus alt base_time CalibrationConstant RadarConstant SignalToNoiseRatio ReceiverNumber CalCheckTime NumHeights ReceiverMode NyquistVelocity AvgNoiseLevel MMCR Spectral Width(SpectralWidth) Azimuth WindowingONOFF ClutterHeight PulseWidth Cloud, doppler spectrum, at altitude, 8-mm radar(Spectra) NumCoherentIntegrations RxGain RangeCorrectedPower Cloud, reflectivity, at altitude(Reflectivity) DCFilterONOFF GateSpacing lat nsammcrmomC1.00: C-Band Polarimetric Radar Data for Darwin, from BOM (RAW)(raw)

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DQRID : D061213.1

Start Date	Start Time	End Date	End Time
12/12/2006	1500	03/14/2007	0234

Subject:	NSA/METTWR/C1 - CMH Sensor Calibrated Incorrectly
DataStreams:	nsamettwr4hC1.b1
Description:	The CMH temp and DP were higher than the co-located T/RH probe at the 2m level. An incorrect calibration along with a failing thermistor caused the readings to be incorrect for both measured values Temp and Dew Point.
Measurements:	nsamettwr4hC1.b1: VPCMH CMHDP CMHTemp CMHRH

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DQRID : D061213.2

Start Date	Start Time	End Date	End Time
11/01/2006	0000	05/22/2007	2347

Subject:	NSA/METTWR/C1 - 40m wind sensor heater failure
DataStreams:	nsamettwr4hC1.b1
Description:	The 40m wind direction became frozen at times. The values from the sensor were flat-lined (stdev = 0) much of the time and did not match sensors from other levels.
Measurements:	nsamettwr4hC1.b1: Wind direction, vector-averaged, at 40-m height(WD40M_DU_WVT) WD40M_SDU_WVT

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DQRID : D070226.1

Start Date	Start Time	End Date	End Time
11/20/2006	0030	11/27/2006	0254
12/08/2006	0125	12/14/2006	2229
12/16/2006	1545	12/21/2006	1105
12/23/2006	1612	01/18/2007	2357
01/20/2007	1357	01/29/2007	2140

Subject:	NSA/METTWR/C1 - 40m Wind Direction Data Suspect
DataStreams:	nsamettwr4hC1.b1
Description:	The 40m wind direction data was suspect due to icing on the vane or a failing shafter heater or a combination of both. The affected data can be easily seen on comparison plots with other levels data or by checking the standard deviation of the 40m wind direction. Any standard deviation of less than 0.10 degrees for the 40m level suggest a sluggish/ice affected sensor.
Measurements:	nsamettwr4hC1.b1: Wind direction, vector-averaged, at 40-m height(WD40M_DU_WVT) WD40M_SDU_WVT

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DQRID : D070529.1

Start Date	Start Time	End Date	End Time
10/18/2006	0000	05/22/2007	2330

Subject:	NSA/METTWR/C1 - 20m RH Data Questionable
DataStreams:	nsamettwr4hC1.b1
Description:	The 20m RH data was questionable at times. When the data appeared to be poor was when the 2m and 20m agreed better than the 20m and the 40m and/or 10m.
Measurements:	nsamettwr4hC1.b1: DP20M_STD Temperature, dew point, average, at 20-m height(DP20M_AVG) Pressure, vapor, at 20-m height(VP20M_AVG) RH20M_STD Relative humidity, average, at 20-m height(RH20M_AVG) VP20M_STD

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DQRID : D070716.4

Start Date	Start Time	End Date	End Time
01/01/2006	0000	10/17/2007	0200

Subject:	NSA/MMCR/C1 - Antenna Feed Corrosion
DataStreams:	nsammcrmomC1.b1, nsammcrspecmomC1.a0
Description:	During a trip to Barrow, I inspected the feed under the antenna and noticed an extreme amount of corrosion that has resulted in the flexible waveguide connected to the feed to be pushed off at an angle with corrosion in between. I attempted to remove and clean but the corrosion has effectively welded the two pieces together. This didn't happen overnight and the start date is a guess. The last inspection of the antenna probably took place in April 2004 when we did the C40 DSP upgrade. I don't know how much the reflectivity is affected by this corrosion. It may be possible to get an idea once we replace the antenna by making some intercomparison measurements. The feed was temporarily repaired on 10/16/2007 until the new antenna was installed. The measured loss before and after the repair was 5.1 dB. This means that the MMCR was under-reporting reflectivity by 10.2 dB just before it was repaired. That said, there is no way of ascertaining what the rate of corrosion was and how the loss changed during the period of this DQR. One can assume that the 5.1 dB loss was the worst that it was.
Measurements:	nsammcrmomC1.b1: Power RadarConstant Cloud, reflectivity, at altitude(Reflectivity) RangeCorrectedPower nsammcrspecmomC1.a0: RangeCorrectedPower Cloud, reflectivity, at altitude(Reflectivity) RadarConstant SignalToNoiseRatio Power

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