Data Quality Reports for Session: 100765 User: kjohnson Completed: 07/27/2006


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D030616.5TWP/MMCR/C1 - Sensitivity DroptwpmmcrcalC1.a1, twpmmcrmomentsC1.a1
D040428.1TWP/SMET/C1 - Poor Performing Sensortwpsmet60sC1.b1
D050601.4TWP/SMET/C1 - Reprocess: Incorrect Units Listed for Vapor Pressuretwpsmet60sC1.b1


DQRID : D030616.5
Start DateStart TimeEnd DateEnd Time
05/28/2003034505/29/20031630
05/31/2003040006/02/20031500
06/09/2003080006/10/20031700
06/26/2003140006/26/20032359
06/29/2003170006/29/20031800
07/18/2003063007/18/20031430
07/20/2003021507/20/20030400
08/01/2003200008/01/20032359
08/17/2003043008/18/20030530
09/16/2003103009/16/20031400
09/16/2003154509/17/20030130
09/22/2003223009/23/20031600
10/09/2003033010/09/20031900
11/20/2003080011/20/20031600
01/11/2004083001/11/20041000
01/22/2004080001/22/20040900
01/27/2004050001/27/20040830
01/27/2004170001/28/20040315
04/11/2004053004/11/20041430
05/23/2004233006/01/20040030
06/02/2004104506/02/20042030
09/13/2004000009/16/20042359
09/18/2004110009/19/20042359
09/28/2004141509/28/20042000
10/08/2004160010/09/20041900
10/18/2004063010/18/20042130
11/03/2004223011/04/20042330
12/13/2004073012/13/20040945
01/04/2005013001/04/20052359
01/05/2005233001/07/20051100
Subject:
TWP/MMCR/C1 - Sensitivity Drop
DataStreams:twpmmcrcalC1.a1, twpmmcrmomentsC1.a1
Description:
Intermittent problem of sensitivity drop during the specified periods.
Measurements:twpmmcrmomentsC1.a1:
  • north latitude for all the input platforms.(lat)
  • Inter-Pulse Period(InterPulsePeriod)
  • Delay to First Range Gate(StartGateDelay)
  • 10000 * [SpectralWidth(m/s) / NyquistVelocity(m/s)](SpectralWidthValue)
  • 10000 * [MeanDopperVelocity(m/s) / NyquistVelocity(m/s)](MeanDopplerValue)
  • altitude above sea levelaltunits(alt)
  • Number of Ffts(NumFft)
  • Number of Spectra Averaged(NumSpectraAveraged)
  • Pulse Width(PulseWidth)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Range Heights (center of radar sample volume)(Heights)
  • RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
  • Time offset from base_time(base_time)
  • Time Spacing Between Gates(GateSpacing)
  • Time offset of tweaks from base_time(time_offset)
  • Delay thgrough Rx(Delay)
  • Number of Code Bits(NumCodeBits)
  • east longitude for all the input platforms.(lon)
  • Number of Gate Heights(NumHeights)
  • Rx bandwidtch switch code(Switch)
  • Signal to noise ratio(SignalToNoiseRatio)
  • 1000 * log10 (noise signal level)(Noise)

twpmmcrcalC1.a1:
  • altitude above sea levelaltunits(alt)
  • Partial Decoding Loss(PartialDecodingLoss)
  • Transmitter Path Loss(TransmitterPathLoss)
  • Time Spacing Between Gates(GateSpacing)
  • Coded Pulse Loss(CodedPulseLoss)
  • Range Heights (center of radar sample volume)(Heights)
  • Number of Gate Heights(NumHeights)
  • Number of Code Bits(NumCodeBits)
  • Peak Transmitted Power(PeakTransmittedPower)
  • Delay to First Range Gate(StartGateDelay)
  • Time offset from base_time(base_time)
  • Receiver Calib Noise Crv Cal. Power Values(RxCalibrationNoiseCrv)
  • north latitude for all the input platforms.(lat)
  • Time offset of tweaks from base_time(time_offset)
  • Receiver Cal Noise Crv Sig Power Values(RxCalibrationNoiseCrvSignal)
  • Circulator #1 Attenuation(CirculatorAttenuation1)
  • MMCR Reflectivity(Reflectivity)
  • east longitude for all the input platforms.(lon)
  • Number of Ffts(NumFft)
  • Pulse Width(PulseWidth)
  • Receiver Path Loss(ReceiverPathLoss)
  • Range Corrected, Calibrated Power(RangeCorrectedCalibratedPower)
  • Number of Coherent Integrations(NumCoherentIntegrations)
  • Number of Spectra Averaged(NumSpectraAveraged)
  • Inter-Pulse Period(InterPulsePeriod)


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DQRID : D040428.1
Start DateStart TimeEnd DateEnd Time
04/23/2004000001/19/20051530
Subject:
TWP/SMET/C1 - Poor Performing Sensor
DataStreams:twpsmet60sC1.b1
Description:
On 4/23/2004 condensation was found inside the target area of the ORG lens. A spare was 
sent and installed but did not solve the problem of high background voltage values causing 
rainrate values to be recorded during no rainfall.  Values range anywhere from 0.06 to 
0.12 mm/hr.  

A new Optical Rain Gage was installed on 01/19/2005 @ 13:30 GMT alleviating the high 
background voltage values that lead to consistent rainfall rates of around 0.11 to 0.15 mm/hr 
on a consistent basis.  

The formula used to calculate rainfall rates from the new Optical Rain Gage is:  RR 
(mm/hr) = 25(V^1.87) - 0.15.

Older model formula = 20(V^2) - 0.05

The two formulas result in comparable data.
Measurements:twpsmet60sC1.b1:
  • Precipitation mean(precip_mean)
  • Precipitation maximum(precip_max)
  • Precipitation standard deviation(precip_sd)
  • precipitation minimum(precip_min)


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DQRID : D050601.4
Start DateStart TimeEnd DateEnd Time
08/03/2004000005/19/20052359
Subject:
TWP/SMET/C1 - Reprocess: Incorrect Units Listed for Vapor Pressure
DataStreams:twpsmet60sC1.b1
Description:
The netcdf file header incorrectly listed the units of Vapor Pressure as hPa when in fact 
they were kPa.
Measurements:twpsmet60sC1.b1:
  • Vapor pressure mean(vappress_mean)
  • Vapor pressure standard deviation(vappress_sd)


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