Data Quality Reports for Session: 117596 User: sbenson Completed: 02/17/2009

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D010718.1NSA/MMCR/C1 - MMCR Data QualitynsammcrcalC1.00, nsammcrcalC1.a1, nsammcrmode01v0091clothC1.c1,
nsammcrmode02v0061clothC1.c1, nsammcrmode03v0081clothC1.c1, nsammcrmode04v0061clothC1.c1, nsammcrmomentsC1.00,
nsammcrmomentsC1.a1, nsammcrmonC1.00, nsammcrpowC1.00
D020606.1NSA/MMCR/C1 - NSA/C1/MMCR- Incorrect Calibrationsnsaarscl1clothC1.c1, nsammcrcalC1.a1, nsammcrmode03v0081clothC1.c1,
nsammcrmode04v0061clothC1.c1


DQRID : D010718.1
Start DateStart TimeEnd DateEnd Time
05/01/2001000007/31/20012359
Subject:
NSA/MMCR/C1 - MMCR Data Quality
DataStreams:nsammcrcalC1.00, nsammcrcalC1.a1, nsammcrmode01v0091clothC1.c1,
nsammcrmode02v0061clothC1.c1, nsammcrmode03v0081clothC1.c1, nsammcrmode04v0061clothC1.c1, nsammcrmomentsC1.00,
nsammcrmomentsC1.a1, nsammcrmonC1.00, nsammcrpowC1.00
Description:
The NSA at Barrow was experiencing technical difficulties related to hardware problems.  
Water was found in a waveguide, which may adveresly impact sensitivity.  An up-down 
converter problem was also found.  This problem may also impact sensitivity.  The quality of 
the radar calibration during this period is unknown, but will be determined at a later date.
Measurements:nsammcrcalC1.a1:
  • Range Corrected, Calibrated Power(RangeCorrectedCalibratedPower)
  • MMCR Reflectivity(Reflectivity)
nsammcrmode03v0081clothC1.c1:
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • MMCR Spectral Width(SpectralWidth)
  • MMCR Reflectivity(Reflectivity)
  • MMCR Signal-to-Noise Ratio(SignaltoNoiseRatio)
nsammcrmode02v0061clothC1.c1:
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • MMCR Reflectivity(Reflectivity)
  • MMCR Signal-to-Noise Ratio(SignaltoNoiseRatio)
  • MMCR Spectral Width(SpectralWidth)
nsammcrcalC1.00:
  • null(Raw data stream - documentation not supported)
nsammcrmode01v0091clothC1.c1:
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • MMCR Signal-to-Noise Ratio(SignaltoNoiseRatio)
  • MMCR Reflectivity(Reflectivity)
  • MMCR Spectral Width(SpectralWidth)
nsammcrmonC1.00:
  • null(Raw data stream - documentation not supported)
nsammcrpowC1.00:
  • null(Raw data stream - documentation not supported)
nsammcrmode04v0061clothC1.c1:
  • MMCR Reflectivity(Reflectivity)
  • MMCR Spectral Width(SpectralWidth)
  • MMCR Signal-to-Noise Ratio(SignaltoNoiseRatio)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
nsammcrmomentsC1.00:
  • null(Raw data stream - documentation not supported)
nsammcrmomentsC1.a1:
  • 10000 * [MeanDopperVelocity(m/s) / NyquistVelocity(m/s)](MeanDopplerValue)
  • 10000 * [SpectralWidth(m/s) / NyquistVelocity(m/s)](SpectralWidthValue)
  • Signal to Noise Ratio(SignalToNoiseRatio)

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DQRID : D020606.1
Start DateStart TimeEnd DateEnd Time
07/03/2001000007/26/20012359
Subject:
NSA/MMCR/C1 - NSA/C1/MMCR- Incorrect Calibrations
DataStreams:nsaarscl1clothC1.c1, nsammcrcalC1.a1, nsammcrmode03v0081clothC1.c1,
nsammcrmode04v0061clothC1.c1
Description:
From 3-July 2001 to 26-July 2001, the NSA MMCR calibration for the
two coded pulse modes is incorrect.  The values of reflectivity computed
by the radars autocalibration software are wrong because they use the
wrong radar constant.  The correct radar constants are: 8-bit coded
mode RC=16.344 and for the 32-bit coded RC=7.313. 

The only impact of the incorrect radar constants should be reflectivity
value
Measurements:nsaarscl1clothC1.c1:
  • MMCR Reflectivity with Clutter Removed(ReflectivityNoClutter)
  • MMCR Reflectivity(Reflectivity)
  • MMCR Best Estimate of Hydrometeor Reflectivity(ReflectivityBestEstimate)
nsammcrcalC1.a1:
  • MMCR Reflectivity(Reflectivity)
nsammcrmode03v0081clothC1.c1:
  • MMCR Reflectivity(Reflectivity)
nsammcrmode04v0061clothC1.c1:
  • MMCR Reflectivity(Reflectivity)

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