Data Quality Reports for Session: 138810 User: lisiwei1 Completed: 11/17/2011

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D020613.3TWP/C2 Installationtwparscl1clothC2.c1, twparsclbnd1clothC2.c1, twparsclcbh1clothC2.c1,
twpmmcrmode01v0071clothC2.c1, twpmmcrmode02v0041clothC2.c1, twpmmcrmode03v0051clothC2.c1,
twpmmcrmode04v0041clothC2.c1
D020927.1SGP/ARSCL/C1 - ARSCL Cloud Bases and Low-level reflectivitiessgparscl1clothC1.c1, sgparsclbnd1clothC1.c1, sgparsclcbh1clothC1.c1
D050222.2SGP/MMCR/C1 - Power supply failuresgpmmcrmomC1.00, sgpmmcrmomC1.b1, sgparscl1clothC1.c1, sgpmmcrspectraC1.a0,
sgparsclbnd1clothC1.c1
D070504.1TWP/ARSCL/C3 - Reprocess: MMCR Height offset affects ARSCL cloud boundariestwparscl1clothC3.c1, twparsclbnd1clothC3.c1, twpmmcrmode1bl200511041clothC3.c1,
twpmmcrmode2ci200511041clothC3.c1, twpmmcrmode3ge200511041clothC3.c1,
twpmmcrmode4pr200511041clothC3.c1
D080415.1TWP/ARSCL/C2 - Bad MMCR datatwparscl1clothC2.c1, twparsclbnd1clothC2.c1, twpmmcrmode01v0071clothC2.c1,
twpmmcrmode02v0041clothC2.c1, twpmmcrmode03v0051clothC2.c1, twpmmcrmode04v0041clothC2.c1
D090728.2NSA/ARSCL/C1 - Reflectivity values unreliablensaarscl1clothC1.c1, nsaarsclbnd1clothC1.c1, nsammcrmode1bl200712011clothC1.c1,
nsammcrmode2ci200712011clothC1.c1, nsammcrmode3ge200712011clothC1.c1,
nsammcrmode4ro200712011clothC1.c1
D100519.1SGP/ARSCL/C1 - Ceilometer not used during processingsgparscl1clothC1.c1, sgparsclbnd1clothC1.c1, sgparsclcbh1clothC1.c1


DQRID : D020613.3
Start DateStart TimeEnd DateEnd Time
11/01/1998000211/19/19982359
Subject:
TWP/C2  Installation
DataStreams:twparscl1clothC2.c1, twparsclbnd1clothC2.c1, twparsclcbh1clothC2.c1,
twpmmcrmode01v0071clothC2.c1, twpmmcrmode02v0041clothC2.c1, twpmmcrmode03v0051clothC2.c1,
twpmmcrmode04v0041clothC2.c1
Description:
The Nauru ARCS was installed during the period September-November
1998.  Data were being collected by the end of October, but for the
first several weeks of November, the site was undergoing considerable
change, so data from that period should be used with caution.  The
official site dedication occured on November 20.  Most on-site
activity ended following the dedication so we will consider November
20 to be the beginning of the Nauru operations.  The last members of
the installation team left Nauru on November 24.
Measurements:twparsclbnd1clothC2.c1:
  • CloudLayerBottomHeightMplCamp
  • time_offset
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
  • CloudLayerBottomHeightMplCloth
  • CloudLayerTopHeightMplCamp
  • CloudLayerTopHeightMplCloth
  • base_time
twparsclcbh1clothC2.c1:
  • MPL Scott Algorithm Cloud Base Height(CloudBaseMplScott)
  • MPL Campbell et al. Algorithm Cloud Base Height(CloudBaseMplCamp)
  • time_offset
  • CloudBasePrecipitation
  • base_time
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • MPL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseMplCloth)
twpmmcrmode01v0071clothC2.c1:
  • time_offset
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • MPL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseMplCloth)
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
  • CloudBasePrecipitation
  • SignaltoNoiseRatio
  • Cloud, reflectivity, at altitude(Reflectivity)
  • MMCR Spectral Width(SpectralWidth)
  • MPL Scott Algorithm Cloud Base Height(CloudBaseMplScott)
  • MPL Campbell et al. Algorithm Cloud Base Height(CloudBaseMplCamp)
  • base_time
  • Heights
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)
twparscl1clothC2.c1:
  • CloudLayerBottomHeightMplCamp
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
  • time_offset
  • base_time
  • MPL Campbell et al. Algorithm Cloud Base Height(CloudBaseMplCamp)
  • SignaltoNoiseRatio
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • MPL Scott Algorithm Cloud Base Height(CloudBaseMplScott)
  • Heights
  • MPL Cloth et al. Algorithm Cloud Mask(CloudMaskMplCloth)
  • Cloud Mask Occurrence, MPL Campbell et al. algorithm(CloudMaskMplCamp)
  • Cloud, reflectivity, at altitude(Reflectivity)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)
  • MMCR Reflectivity, Best estimate, Hydrometer(ReflectivityBestEstimate)
  • CloudLayerTopHeightMplCloth
  • ModeId
  • MPL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseMplCloth)
  • MMCR Spectral Width(SpectralWidth)
  • CloudLayerTopHeightMplCamp
  • RadarFirstTop
  • MMCR Reflectivity, clutter removed(ReflectivityNoClutter)
  • CloudLayerBottomHeightMplCloth
  • CloudBasePrecipitation
twpmmcrmode04v0041clothC2.c1:
  • time_offset
  • MMCR Spectral Width(SpectralWidth)
  • Cloud, reflectivity, at altitude(Reflectivity)
  • MPL Campbell et al. Algorithm Cloud Base Height(CloudBaseMplCamp)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • MPL Scott Algorithm Cloud Base Height(CloudBaseMplScott)
  • Heights
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)
  • CloudBasePrecipitation
  • SignaltoNoiseRatio
  • MPL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseMplCloth)
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
  • base_time
twpmmcrmode02v0041clothC2.c1:
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • SignaltoNoiseRatio
  • MPL Scott Algorithm Cloud Base Height(CloudBaseMplScott)
  • base_time
  • MPL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseMplCloth)
  • time_offset
  • CloudBasePrecipitation
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)
  • MPL Campbell et al. Algorithm Cloud Base Height(CloudBaseMplCamp)
  • Heights
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • Cloud, reflectivity, at altitude(Reflectivity)
  • MMCR Spectral Width(SpectralWidth)
twpmmcrmode03v0051clothC2.c1:
  • time_offset
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • MPL Campbell et al. Algorithm Cloud Base Height(CloudBaseMplCamp)
  • Heights
  • CloudBasePrecipitation
  • Cloud, reflectivity, at altitude(Reflectivity)
  • MPL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseMplCloth)
  • MPL Scott Algorithm Cloud Base Height(CloudBaseMplScott)
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
  • base_time
  • SignaltoNoiseRatio
  • MMCR Spectral Width(SpectralWidth)
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)

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DQRID : D020927.1
Start DateStart TimeEnd DateEnd Time
12/01/1996000002/04/20002359
Subject:
SGP/ARSCL/C1 - ARSCL Cloud Bases and Low-level reflectivities
DataStreams:sgparscl1clothC1.c1, sgparsclbnd1clothC1.c1, sgparsclcbh1clothC1.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:sgparsclbnd1clothC1.c1:
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
sgparscl1clothC1.c1:
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • Cloud, reflectivity, at altitude(Reflectivity)
  • MMCR Reflectivity, Best estimate, Hydrometer(ReflectivityBestEstimate)
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
sgparsclcbh1clothC1.c1:
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)

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DQRID : D050222.2
Start DateStart TimeEnd DateEnd Time
01/16/2005003002/11/20052115
Subject:
SGP/MMCR/C1 - Power supply failure
DataStreams:sgpmmcrmomC1.00, sgpmmcrmomC1.b1, sgparscl1clothC1.c1, sgpmmcrspectraC1.a0,
sgparsclbnd1clothC1.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:sgparsclbnd1clothC1.c1:
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
  • CloudLayerBottomHeightMplCloth
  • CloudLayerBottomHeightMplCamp
  • time_offset
  • CloudLayerTopHeightMplCloth
  • CloudLayerTopHeightMplCamp
  • base_time
sgparscl1clothC1.c1:
  • MMCR Reflectivity, clutter removed(ReflectivityNoClutter)
  • SignaltoNoiseRatio
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
  • base_time
  • CloudBasePrecipitation
  • ModeId
  • MPL Scott Algorithm Cloud Base Height(CloudBaseMplScott)
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • Cloud, reflectivity, at altitude(Reflectivity)
  • RadarFirstTop
  • MPL Cloth et al. Algorithm Cloud Mask(CloudMaskMplCloth)
  • time_offset
  • MMCR Reflectivity, Best estimate, Hydrometer(ReflectivityBestEstimate)
  • MPL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseMplCloth)
  • Heights
  • CloudLayerTopHeightMplCloth
  • CloudLayerBottomHeightMplCamp
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • MPL Campbell et al. Algorithm Cloud Base Height(CloudBaseMplCamp)
  • MMCR Spectral Width(SpectralWidth)
  • CloudLayerBottomHeightMplCloth
  • CloudLayerTopHeightMplCamp
  • Cloud Mask Occurrence, MPL Campbell et al. algorithm(CloudMaskMplCamp)
sgpmmcrspectraC1.a0:
  • base_time
  • lat
  • Cloud, doppler spectrum, at altitude, 8-mm radar(Spectra)
  • GateSpacing
  • NumSpectraAveraged
  • Delay
  • PulseWidth
  • time_offset
  • Switch
  • NumCodeBits
  • NumFft
  • alt
  • InterPulsePeriod
  • StartGateDelay
  • NumCoherentIntegrations
  • NumHeights
  • Heights
  • lon
sgpmmcrmomC1.00:
  • AVHRR satellite images for Darwin from BOM (RAW)(raw)
sgpmmcrmomC1.b1:
  • lat
  • SignalToNoiseRatio
  • RadarConstant
  • GateSpacing
  • TimeAvg
  • RxCalTimeStamp
  • NumHeights
  • PeakTransmittedPowerAvg
  • DataQualityStatus
  • ModeDescription
  • ModeNum
  • SkyNoiseLevel
  • CalCheckTime
  • time_offset
  • heights
  • Power
  • RangeCorrectedPower
  • NoiseLevel
  • AvgNoiseLevel
  • CalCheckLevel
  • alt
  • Cloud, reflectivity, at altitude(Reflectivity)
  • MinimumDetectableReflectivity
  • NumReceivers
  • NumCodeBits
  • NumCoherentIntegrations
  • TWTStatusCode
  • MMCR Spectral Width(SpectralWidth)
  • lon
  • CircularDepolarizationRatio
  • time
  • NumFFT
  • ReceiverNumber
  • NumSpectralAverages
  • base_time
  • ClutterHeight
  • PulseWidth
  • RxGain
  • InterPulsePeriod
  • DCFilterONOFF
  • ReceiverMode
  • StartGateDelay
  • Rx290KLevel
  • NyquistVelocity
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • WindowingONOFF

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DQRID : D070504.1
Start DateStart TimeEnd DateEnd Time
11/04/2005000005/31/20062359
Subject:
TWP/ARSCL/C3 - Reprocess: MMCR Height offset affects ARSCL cloud boundaries
DataStreams:twparscl1clothC3.c1, twparsclbnd1clothC3.c1, twpmmcrmode1bl200511041clothC3.c1,
twpmmcrmode2ci200511041clothC3.c1, twpmmcrmode3ge200511041clothC3.c1,
twpmmcrmode4pr200511041clothC3.c1
Description:
MMCR heights were recorded as being too high by the following amounts:
   Mode 1: 24.8756 m too high
   Mode 2: 25.6249 m too high
   Mode 3: 33.1176 m too high
   Mode 4: 33.1176 m too high

These errors may affect cloud boundaries that are determined by combining MMCR and MPL 
measurements;  radar moments heights will be off by these amounts also.

NOTE: reprocessing is underway.  20060101-20060228 have been reprocessed and archived.  
These data cover the period of TWP-ICE.
Measurements:twparscl1clothC3.c1:
  • CloudLayerBottomHeightMplCloth
  • CloudLayerTopHeightMplCloth
  • CloudLayerTopHeightMplCamp
  • CloudLayerBottomHeightMplCamp
  • Heights
twparsclbnd1clothC3.c1:
  • CloudLayerBottomHeightMplCamp
  • CloudLayerTopHeightMplCamp
  • CloudLayerTopHeightMplCloth
  • CloudLayerBottomHeightMplCloth
twpmmcrmode3ge200511041clothC3.c1:
  • Heights
twpmmcrmode1bl200511041clothC3.c1:
  • Heights
twpmmcrmode2ci200511041clothC3.c1:
  • Heights
twpmmcrmode4pr200511041clothC3.c1:
  • Heights

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DQRID : D080415.1
Start DateStart TimeEnd DateEnd Time
12/20/1999000012/29/19992359
Subject:
TWP/ARSCL/C2 - Bad MMCR data
DataStreams:twparscl1clothC2.c1, twparsclbnd1clothC2.c1, twpmmcrmode01v0071clothC2.c1,
twpmmcrmode02v0041clothC2.c1, twpmmcrmode03v0051clothC2.c1, twpmmcrmode04v0041clothC2.c1
Description:
The MMCR was not operating properly during this period so the data should not have been 
used in determining cloud boundaries or radar moments.
Measurements:twparsclbnd1clothC2.c1:
  • CloudLayerBottomHeightMplCamp
  • CloudLayerTopHeightMplCamp
  • CloudLayerTopHeightMplCloth
  • CloudLayerBottomHeightMplCloth
twpmmcrmode01v0071clothC2.c1:
  • MMCR Spectral Width(SpectralWidth)
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • SignaltoNoiseRatio
  • Cloud, reflectivity, at altitude(Reflectivity)
twparscl1clothC2.c1:
  • Cloud, reflectivity, at altitude(Reflectivity)
  • CloudLayerBottomHeightMplCamp
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • MMCR Reflectivity, Best estimate, Hydrometer(ReflectivityBestEstimate)
  • CloudLayerTopHeightMplCloth
  • MMCR Spectral Width(SpectralWidth)
  • SignaltoNoiseRatio
  • CloudLayerTopHeightMplCamp
  • RadarFirstTop
  • MMCR Reflectivity, clutter removed(ReflectivityNoClutter)
  • CloudLayerBottomHeightMplCloth
twpmmcrmode04v0041clothC2.c1:
  • MMCR Spectral Width(SpectralWidth)
  • Cloud, reflectivity, at altitude(Reflectivity)
  • SignaltoNoiseRatio
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
twpmmcrmode02v0041clothC2.c1:
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Cloud, reflectivity, at altitude(Reflectivity)
  • SignaltoNoiseRatio
  • MMCR Spectral Width(SpectralWidth)
twpmmcrmode03v0051clothC2.c1:
  • MMCR Mean Doppler Velocity(MeanDopplerVelocity)
  • Cloud, reflectivity, at altitude(Reflectivity)
  • SignaltoNoiseRatio
  • MMCR Spectral Width(SpectralWidth)

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DQRID : D090728.2
Start DateStart TimeEnd DateEnd Time
12/01/2007000002/13/20082359
Subject:
NSA/ARSCL/C1 - Reflectivity values unreliable
DataStreams:nsaarscl1clothC1.c1, nsaarsclbnd1clothC1.c1, nsammcrmode1bl200712011clothC1.c1,
nsammcrmode2ci200712011clothC1.c1, nsammcrmode3ge200712011clothC1.c1,
nsammcrmode4ro200712011clothC1.c1
Description:
Reflectivity dBZ values should not be used.  The reported cloud boundaries may 
underestimate cloud tops, particularly for high or thick clouds.  Also thin high clouds may have 
been missed entirely, especially if there were lower-level cloud layers below them. During 
this time period, the MMCR was transmitting in  circular polarization, rather than 
(correct) linear polarization. This caused reported Reflectivity values to be too low by an 
unknown amount, resulting in an effective loss of radar sensitivity.

Areas identified as have having hydrometeor detections are correct, however some areas 
marked as clear may in fact contain cloud due to the MMCR's low sensitivity during this time.
Measurements:nsammcrmode4ro200712011clothC1.c1:
  • Cloud, reflectivity, at altitude(Reflectivity)
nsammcrmode3ge200712011clothC1.c1:
  • Cloud, reflectivity, at altitude(Reflectivity)
nsammcrmode1bl200712011clothC1.c1:
  • Cloud, reflectivity, at altitude(Reflectivity)
nsammcrmode2ci200712011clothC1.c1:
  • Cloud, reflectivity, at altitude(Reflectivity)
nsaarsclbnd1clothC1.c1:
  • CloudLayerBottomHeightMplCloth
  • CloudLayerTopHeightMplCloth
nsaarscl1clothC1.c1:
  • CloudLayerTopHeightMplCloth
  • MMCR Reflectivity, Best estimate, Hydrometer(ReflectivityBestEstimate)
  • RadarFirstTop
  • Cloud, reflectivity, at altitude(Reflectivity)
  • MMCR Reflectivity, clutter removed(ReflectivityNoClutter)
  • CloudLayerBottomHeightMplCloth

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DQRID : D100519.1
Start DateStart TimeEnd DateEnd Time
11/20/2009000012/31/20092359
Subject:
SGP/ARSCL/C1 - Ceilometer not used during processing
DataStreams:sgparscl1clothC1.c1, sgparsclbnd1clothC1.c1, sgparsclcbh1clothC1.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:sgparsclbnd1clothC1.c1:
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
sgparscl1clothC1.c1:
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)
  • LASER Cloud Base Height Best Estimate(CloudBaseBestEstimate)
sgparsclcbh1clothC1.c1:
  • BLC/VCEIL Clothiaux et al. Algorithm Cloud Base Height(CloudBaseCeilometerCloth)
  • BLC/VCEIL Standard Algorithm Cloud Base Height(CloudBaseCeilometerStd)

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