Data Quality Reports for Session: 132616 User: troyan Completed: 01/14/2011

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D100224.6GRW/MWR/M1 - Reprocess: Biased LWP retrievals-Updated retrieval coefficientsgrwmwrlosM1.b1, grwmwrtipM1.a1
D100326.2GRW/MWR/M1 - Incorrect ambient temperaturegrwmwrlosM1.b1, grwmwrtipM1.a1
D100716.1GRW/MWR/M1 - Incorrect instrument computer set-upgrwmwrlosM1.b1, grwmwrtipM1.a1
D100722.5GRW/MET/M1 - Reprocess: ORG Data has very small rainrate values grwmetM1.b1
D100830.1GRW/MWR/M1 - Erratic brightness temperaturegrwmwrlosM1.b1, grwmwrtipM1.a1
D100830.3GRW/MWR/M1 - Missing datagrwmwrlosM1.b1, grwmwrtipM1.a1


DQRID : D100224.6
Start DateStart TimeEnd DateEnd Time
05/01/2009000003/31/20101700
Subject:
GRW/MWR/M1 - Reprocess: Biased LWP retrievals-Updated retrieval coefficients
DataStreams:grwmwrlosM1.b1, grwmwrtipM1.a1
Description:
Retrieval coefficients were updated to screen for some bad soundings
Measurements:grwmwrtipM1.a1:
  • liqtip
grwmwrlosM1.b1:
  • Total liquid water along LOS path(liq)

Back To Table of Contents

DQRID : D100326.2
Start DateStart TimeEnd DateEnd Time
02/09/2010104802/11/20101045
Subject:
GRW/MWR/M1 - Incorrect ambient temperature
DataStreams:grwmwrlosM1.b1, grwmwrtipM1.a1
Description:
The ambient temperature readings are incorrect.  Problem appeared to have started around 
10:48 GMT on 02/09, but was not really noticeable until slightly after 11 GMT, when tkair 
values dipped considerably.  

The dewblower was replaced on 2/11 and temperature readings returned to normal.
Measurements:grwmwrtipM1.a1:
  • tkair
grwmwrlosM1.b1:
  • tkair

Back To Table of Contents

DQRID : D100716.1
Start DateStart TimeEnd DateEnd Time
07/11/2010180008/09/20101400
Subject:
GRW/MWR/M1 - Incorrect instrument computer set-up
DataStreams:grwmwrlosM1.b1, grwmwrtipM1.a1
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
  • 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

Back To Table of Contents

DQRID : D100722.5
Start DateStart TimeEnd DateEnd Time
04/14/2009000006/30/20102359
Subject:
GRW/MET/M1 - Reprocess: ORG Data has very small rainrate values
DataStreams:grwmetM1.b1
Description:
The ORG data is collected via analog signal and not digital.  Therefore, we continuously 
collect data even when no rain is occurring.  We also capture small events such as leaves, 
large bugs, dust, etc blowing through the measurement path.  Because this discrete event 
occurs quickly the value is usually captured for 1 or 2 seconds.  This value is then 
averaged to the minute producing rainrate on the order of .009 mm/hr or less.  

These values are not indicative of rain and should be removed from the record or summing 
over long periods can bias the climate record.  We will reprocess the data to remove these 
small values.
Measurements:grwmetM1.b1:
  • precip_rate_sd
  • Rain, surface, 1-min avg(precip_rate_mean)
  • precip_rate_min
  • precip_rate_max

Back To Table of Contents

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
  • tbsky31tip
  • tc31
  • 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

Back To Table of Contents

DQRID : D100830.3
Start DateStart TimeEnd DateEnd Time
07/04/2010160007/06/20101400
Subject:
GRW/MWR/M1 - Missing data
DataStreams:grwmwrlosM1.b1, grwmwrtipM1.a1
Description:
Data are missing and unrecoverable.
Measurements:grwmwrtipM1.a1:
  • vaptip
  • tc23
  • bbn23
  • wet_window
  • tnd_nom23
  • tbsky31tip
  • time
  • tipsky31
  • actel
  • bb31
  • tbsky23tip
  • tc31
  • r31
  • tnd31
  • tipsky23
  • bb23
  • tkbb
  • tkxc
  • time_offset
  • tknd
  • r23
  • actaz
  • base_time
  • tnd23
  • tkair
  • alt
  • lat
  • tnd_nom31
  • tnd31I
  • bbn31
  • tnd23I
  • lon
  • liqtip
grwmwrlosM1.b1:
  • Temperature, Sky Infra-Red(sky_ir_temp)
  • tnd31
  • bbn31
  • lon
  • time
  • bb23
  • Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
  • tc23
  • base_time
  • alt
  • tkbb
  • sky31
  • bb31
  • tc31
  • sky23
  • wet_window
  • tknd
  • Total liquid water along LOS path(liq)
  • tnd_nom31
  • tkxc
  • tkair
  • tnd_nom23
  • bbn23
  • Total water vapor along LOS path(vap)
  • tnd23
  • lat
  • 31.4 GHz sky brightness temperature(tbsky31)
  • time_offset

Back To Table of Contents


END OF DATA