Data Quality Reports for Session: 183407 User: jianjun523 Completed: 02/13/2017


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D020927.1SGP/ARSCL/C1 - ARSCL Cloud Bases and Low-level reflectivitiessgparscl1clothC1.c1Suspect
D050222.2SGP/MMCR/C1 - Power supply failuresgparscl1clothC1.c1Incorrect
D100519.1SGP/ARSCL/C1 - Ceilometer not used during processingsgparscl1clothC1.c1Suspect


DQRID : D020927.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/01/1996000002/04/20002359Suspect
Subject:
SGP/ARSCL/C1 - ARSCL Cloud Bases and Low-level reflectivities
DataStreams:sgparscl1clothC1.c1
Description:
Prior to February 4, 2000, the ARSCL data set incorporated data from the
Beaufort Laser Ceilometer as one of its inputs.  Because of the BLC's
high spatial resolution, this data was often chosen by ARSCL as the
"CloudBaseBestEstimate" for boundary layer clouds. It was subsequently
determined that the BLC cloud base was biased, with the BLC reporting
cloud base heights that are 122 meters too high.

The bias error will be corrected when the entire ARSCL data set is
reprocessed as part of release_4.  (The release version number is included
the the netCDF global comments).   This reprocessing will also include a
small correction the the MMCR near-field reflectivities.  This correction
is less than 1 dB except for hydrometers within 200 meters of the surface.

Thanks to Roger Marchand for helping bracket this problem.
Measurements:sgparscl1clothC1.c1:
  • Reflectivity(Reflectivity)
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • MMCR Reflectivity, Best estimate, Hydrometer(ReflectivityBestEstimate)
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)
  • CloudBase, Best estimate(CloudBaseBestEstimate)


Back To Table of Contents

DQRID : D050222.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/16/2005003002/11/20052115Incorrect
Subject:
SGP/MMCR/C1 - Power supply failure
DataStreams:sgparscl1clothC1.c1
Description:
A power supply failed in the MMCR's receiver.  During the period of this DQR, the radar 
would appear to work but the calibration is probably incoorect during good portions of this 
time.  The power supply was replaced and normal operation resumed at 2115 on 02/11/2005.
Measurements:sgparscl1clothC1.c1:
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • MPL Cloth et al. Algorithm Cloud Mask(CloudMaskMplCloth)
  • MPL Campbell et al. Algorithm Cloud Base Height(CloudBaseMplCamp)
  • MMCR Spectral Width(SpectralWidth)
  • MMCR Reflectivity, clutter removed(ReflectivityNoClutter)
  • CloudLayerBottomHeightMplCloth
  • time_offset
  • CloudLayerTopHeightMplCamp
  • MMCR Reflectivity, Best estimate, Hydrometer(ReflectivityBestEstimate)
  • SignaltoNoiseRatio
  • MPL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseMplCloth)
  • Heights
  • CloudBase, Best estimate(CloudBaseBestEstimate)
  • CloudLayerTopHeightMplCloth
  • CloudLayerBottomHeightMplCamp
  • Reflectivity(Reflectivity)
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • base_time
  • CloudBasePrecipitation
  • ModeId
  • RadarFirstTop
  • Cloud Mask Occurrence, MPL Campbell et al. algorithm(CloudMaskMplCamp)
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)
  • MPL Scott Algorithm Cloud Base Height(CloudBaseMplScott)


Back To Table of Contents

DQRID : D100519.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
11/20/2009000012/31/20092359Suspect
Subject:
SGP/ARSCL/C1 - Ceilometer not used during processing
DataStreams:sgparscl1clothC1.c1
Description:
The ceilometer was not used during processing due to a ceilometer data format change that 
ARSCL did not handle properly.  As a result, cloud boundaries in the lowest several 
kilometers may be less accurate than usual, as they are based solely on the micropulse lidar 
and millimeter cloud radar.
Measurements:sgparscl1clothC1.c1:
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)
  • CloudBase, Best estimate(CloudBaseBestEstimate)


Back To Table of Contents



END OF DATA