Data Quality Reports for Session: 184056 User: a1varble Completed: 03/06/2017


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D120828.20TWP/CSAPR/I10 - General Quality StatementtwpcsaprsurI10.00, twpcsaprrhiI10.00Suspect
D121227.1TWP/CSAPR/I10 - PHIDP IncorrecttwpcsaprsurI10.00, twpcsaprrhiI10.00Incorrect


DQRID : D120828.20
Start DateStart TimeEnd DateEnd Time Data Quality Metric
08/10/2011000012/15/20132359Suspect
Subject:
TWP/CSAPR/I10 - General Quality Statement
DataStreams:twpcsaprsurI10.00, twpcsaprrhiI10.00
Description:
The CSAPR continues to undergo evaluation by the radar instrument mentors, VAP developers, 
DQ Office, site scientists, users, etc.  As more in-depth analysis and calibration 
studies take place, we anticipate that new insights will be gained to increase the quality of 
the data and decrease the uncertainty of the measurements.  This is a continuous 
improvement process and issues will be addressed as they are discovered.

As issues are discovered, attempts will be made to correct data that is currently in the 
Archive.  However, retrospective correction of errors due calibration, signal processing, 
component degradation and software bugs may not be possible for many of the data files.

This DQR is an advisory that some aspects of the data quality are not yet known.  It is 
also a request for users that find issues or questions with the data to contact the ARM 
Radar Engineering & Operations Group Manager so that they can be investigated and corrected 
if necessary.
Measurements:twpcsaprrhiI10.00:
  • range
  • altitude
  • Unfiltered lag-0 co-polar correlation coefficient(copol_coeff_unf)
  • power_vertical
  • Unfiltered specific differential phase(diff_phase_unf)
  • Specific differential phase, clutter filtered(diff_phase)
  • Differential reflectivity, clutter filtered(diff_reflectivity)
  • Unfiltered reflectivity in horizontal polarization(reflectivity_horizontal_unf)
  • Unfiltered differential reflectivity(diff_reflectivity_unf)
  • Differential propagation phase shift(dp_phase_shift)
  • azimuth
  • Reflectivity horizontal(reflectivity_horizontal)
  • Unfiltered reflectivity in vertical polarization(reflectivity_vertical_unf)
  • power_horizontal
  • Clutter filtered reflectivity in vertical polarization(reflectivity_vertical)
  • Lag-0 co-polar correlation coefficient, clutter filtered(copol_coeff)
  • norm_coherent_power_unf
  • norm_coherent_power
  • Unfiltered differential propagation phase shift(dp_phase_shift_unf)
  • Unfiltered Mean Doppler velocity(mean_doppler_velocity_unf)
  • Unfiltered Doppler spectral width(doppler_spectral_width_unf)
  • time
  • Doppler spectral width, clutter filtered(doppler_spectral_width)
  • power_vertical_unf
  • power_horizontal_unf
  • Mean Doppler Velocity(mean_doppler_velocity)

twpcsaprsurI10.00:
  • power_horizontal
  • Mean Doppler Velocity(mean_doppler_velocity)
  • power_vertical_unf
  • time
  • norm_coherent_power_unf
  • Differential propagation phase shift(dp_phase_shift)
  • Lag-0 co-polar correlation coefficient, clutter filtered(copol_coeff)
  • Unfiltered specific differential phase(diff_phase_unf)
  • Reflectivity horizontal(reflectivity_horizontal)
  • Unfiltered reflectivity in vertical polarization(reflectivity_vertical_unf)
  • Doppler spectral width, clutter filtered(doppler_spectral_width)
  • norm_coherent_power
  • Differential reflectivity, clutter filtered(diff_reflectivity)
  • Unfiltered Mean Doppler velocity(mean_doppler_velocity_unf)
  • Unfiltered reflectivity in horizontal polarization(reflectivity_horizontal_unf)
  • Specific differential phase, clutter filtered(diff_phase)
  • Unfiltered differential propagation phase shift(dp_phase_shift_unf)
  • power_vertical
  • gate
  • Clutter filtered reflectivity in vertical polarization(reflectivity_vertical)
  • power_horizontal_unf
  • Unfiltered Doppler spectral width(doppler_spectral_width_unf)
  • Unfiltered differential reflectivity(diff_reflectivity_unf)
  • Unfiltered lag-0 co-polar correlation coefficient(copol_coeff_unf)


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DQRID : D121227.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/18/2011000012/17/20120000Incorrect
Subject:
TWP/CSAPR/I10 - PHIDP Incorrect
DataStreams:twpcsaprsurI10.00, twpcsaprrhiI10.00
Description:
The CSAPR software was found to have a bug in controlling its Automatic Frequency Conrol 
(AFC) causing errors in PHIDP (specific differential phase).  This is often exhibited by 
the appearance of concentric rings in PHIDP where there are radar returns.
Measurements:twpcsaprrhiI10.00:
  • Specific differential phase, clutter filtered(diff_phase)
  • Differential propagation phase shift(dp_phase_shift)
  • Unfiltered differential propagation phase shift(dp_phase_shift_unf)
  • Unfiltered specific differential phase(diff_phase_unf)

twpcsaprsurI10.00:
  • Specific differential phase, clutter filtered(diff_phase)
  • Differential propagation phase shift(dp_phase_shift)
  • Unfiltered differential propagation phase shift(dp_phase_shift_unf)
  • Unfiltered specific differential phase(diff_phase_unf)


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