Data Quality Reports for Session: 151251 User: jeffelf Completed: 07/01/2013

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D100716.1GRW/MWR/M1 - Incorrect instrument computer set-upgrwmwrtipM1.a1, grwmwrlosM1.b1
D100830.1GRW/MWR/M1 - Erratic brightness temperaturegrwmwrlosM1.b1, grwmwrtipM1.a1
D100909.1GRW/MWRP/M1 - Reprocessed: Updated calibration coefficientsgrwmwrpM1.b1
D110203.1GRW/MWRP/M1 - Temp/RH sensor failuregrwmwrpM1.b1
D110512.1GRW/MWRHF/M1 - Incorrect surface temp and RHgrwmwrhfM1.b1


DQRID : D100716.1
Start DateStart TimeEnd DateEnd Time
07/11/2010180008/09/20101400
Subject:
GRW/MWR/M1 - Incorrect instrument computer set-up
DataStreams:grwmwrtipM1.a1, grwmwrlosM1.b1
Description:
Starting late on 07/11 the instrument began to have very brief (< 1 min) data outages 
every few hours.  By 07/12 data had become noticeably incorrect, particularly the PWV, LWP, 
TB23, and TB31.  At ~17 Z on 0713 the missing data / no data available flags became more 
frequent.

The problem was identified as improper settings of the instrument computer and was solved 
on 8/9.
Measurements:grwmwrtipM1.a1:
  • tnd_nom31
  • vaptip
  • tnd31I
  • r23
  • tc23
  • tbsky23tip
  • tnd_nom23
  • tbsky31tip
  • tc31
  • tnd23I
  • r31
  • tnd31
  • tnd23
  • liqtip
grwmwrlosM1.b1:
  • Total water vapor along LOS path(vap)
  • tnd31
  • tnd23
  • Total liquid water along LOS path(liq)
  • tnd_nom31
  • 31.4 GHz sky brightness temperature(tbsky31)
  • tnd_nom23
  • Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
  • tc23
  • tc31

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DQRID : D100830.1
Start DateStart TimeEnd DateEnd Time
07/20/2010120008/09/20101400
Subject:
GRW/MWR/M1 - Erratic brightness temperature
DataStreams:grwmwrlosM1.b1, grwmwrtipM1.a1
Description:
Around 12 Z on 7/20 both the PWV and 23.8 GHz brightness temp values began to diverge from 
those of the MWRP. By 7/22 both the LWP and 31.4 GHz brightness temp had followed suit. 
At 0600 Z on 7/22 multiple (10-20), brief (<=1 min) data outages began appearing hourly.  
The problem persisted intermittently until 8/9.

On 8/9, changes in the settings of the computer restored the proper functionality of the 
MWR software.
Measurements:grwmwrtipM1.a1:
  • tnd_nom31
  • vaptip
  • tnd31I
  • tc23
  • tbsky23tip
  • tnd_nom23
  • tc31
  • tbsky31tip
  • tnd23I
  • tnd31
  • tnd23
  • liqtip
grwmwrlosM1.b1:
  • Total water vapor along LOS path(vap)
  • tnd31
  • Total liquid water along LOS path(liq)
  • tnd23
  • tnd_nom31
  • 31.4 GHz sky brightness temperature(tbsky31)
  • tnd_nom23
  • Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
  • tc23
  • tc31

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DQRID : D100909.1
Start DateStart TimeEnd DateEnd Time
07/01/2010000009/08/20101532
Subject:
GRW/MWRP/M1 - Reprocessed: Updated calibration coefficients
DataStreams:grwmwrpM1.b1
Description:
On 9/8/2010 the calibration of of the K-band channels was updated. This caused a slight 
decrease of the retrieved liquid water path. 

Updated calibrations have been applied to data from 7/1-9/8.  The LWP was decreased 
slightly as a result of the recalibration.  Reprocessed data were archived in November 2010.
Measurements:grwmwrpM1.b1:
  • Microwave brightness temperature(brightnessTemperature)
  • Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)
  • Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
  • Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
  • Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
  • Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)

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DQRID : D110203.1
Start DateStart TimeEnd DateEnd Time
10/23/2010000001/06/20110759
Subject:
GRW/MWRP/M1 - Temp/RH sensor failure
DataStreams:grwmwrpM1.b1
Description:
The temperature and humidity sensor failed causing software crashes and poor retrieval 
quality.

Surface temperature and humidity are incorrect and the bad temperature readings affected 
the retrievals. Users should completely disregard retrievals from this instrument.
Measurements:grwmwrpM1.b1:
  • Air temperature(temperature)
  • Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)
  • Height, level of free convection(levelFreeConvection)
  • Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
  • Retrieved dewpoint temperature(dewpointTemperature)
  • Temperature, virtual, vert. prof. sfc-10km, fr. wtr. vap. dens. and temp. prof.(virtualTemperature)
  • Height, lifting condensation level(liftingCondensationLevel)
  • Pressure, lifting condensation level(liftingCondensationLevelPres)
  • Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
  • Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
  • Pressure, level of free convection(levelFreeConvectionPres)
  • Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
  • Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
  • Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
  • Retrieved water vapor mixing ratio(waterVaporMixingRatio)

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DQRID : D110512.1
Start DateStart TimeEnd DateEnd Time
05/06/2010000001/06/20110800
Subject:
GRW/MWRHF/M1 - Incorrect surface temp and RH
DataStreams:grwmwrhfM1.b1
Description:
The surface temperature and surface relative humidity did not compare well with the 
co-located MET system.   The temperature was not too different than the MET system, but trended 
differently.  The MWRHF RH values were often 20% or greater different and trended 
inversely.
Measurements:grwmwrhfM1.b1:
  • Temperature, air(temp)
  • Humidity, relative(rh)

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