Data Quality Reports for Session: 149837 User: melissayes Completed: 05/01/2013


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060928.3SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdrysgpsondewnpnC1.b1
D990124.2SGP/SONDE - Dry bias in sonde RHsgpsondewnpnB1.a1, sgpsondewnpnB4.a0, sgpsondewnpnB4.a1, sgpsondewnpnB5.a0,
sgpsondewnpnB5.a1, sgpsondewnpnB6.a0, sgpsondewnpnB6.a1, sgpsondewnpnC1.a0, sgpsondewnpnC1.a1,
sgpsondewnprC1.a0, sgpsondewnprC1.a1, sgpsondewrpnB1.00, sgpsondewrpnB1.a0,
sgpsondewrpnB1.a1, sgpsondewrpnB4.00, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.00,
sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.00, sgpsondewrpnB6.a0,
sgpsondewrpnB6.a1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewrprB1.00,
sgpsondewrprB1.a0, sgpsondewrprB1.a1, sgpsondewrprB4.00, sgpsondewrprB4.a0, sgpsondewrprB4.a1,
sgpsondewrprB5.00, sgpsondewrprB5.a0, sgpsondewrprB5.a1, sgpsondewrprC1.00,
sgpsondewrprC1.a0, sgpsondewrprC1.a1, DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1,
DsgpsondeB4.00, DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1,
DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, DsgpsondenogcptucalcB1.c1,
DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1,
DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1, DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1,
DsgpsondeptuB1.00, DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00,
DsgpsondeptuC1.00, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1, DsgpsondeptucalcB5.c1,
DsgpsondeptucalcC1.c1, sgpsondeB1.00, sgpsondeB1.a0, sgpsondeB1.a1, sgpsondeB4.00, sgpsondeB4.a0,
sgpsondeB4.a1, sgpsondeB5.00, sgpsondeB5.a0, sgpsondeB5.a1, sgpsondeB6.00,
sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, sgpsondeptuC1.00, sgpsondewnpnB1.a0


DQRID : D060928.3
Start DateStart TimeEnd DateEnd Time
09/28/2006172812/31/99992359
Subject:
SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry
DataStreams:sgpsondewnpnC1.b1
Description:
The output precision of the following variables was increased 20060928

alt  changed from 1m to 0.1m
dp   changed from 0.1degC to 0.01degC
pres changed from 0.1 hPa to 0.01 hPa
RH   changed from 1%RH to 0.01%RH
tdry changed from .1degC to 0.01degC

Note that the increase in precision does not necessarily imply an increase in accuracy.  
Users are cautioned to continue to use their best scientific judgement when using these or 
any other data.
Measurements:sgpsondewnpnC1.b1:
  • alt
  • Dry Bulb Temperature(tdry)
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)
  • Pressure, atmospheric, constant value of model level, RUC model output(pres)


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DQRID : D990124.2
Start DateStart TimeEnd DateEnd Time
05/27/1992000005/31/20022359
Subject:
SGP/SONDE - Dry bias in sonde RH
DataStreams:sgpsondewnpnB1.a1, sgpsondewnpnB4.a0, sgpsondewnpnB4.a1, sgpsondewnpnB5.a0,
sgpsondewnpnB5.a1, sgpsondewnpnB6.a0, sgpsondewnpnB6.a1, sgpsondewnpnC1.a0, sgpsondewnpnC1.a1,
sgpsondewnprC1.a0, sgpsondewnprC1.a1, sgpsondewrpnB1.00, sgpsondewrpnB1.a0,
sgpsondewrpnB1.a1, sgpsondewrpnB4.00, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.00,
sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.00, sgpsondewrpnB6.a0,
sgpsondewrpnB6.a1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewrprB1.00,
sgpsondewrprB1.a0, sgpsondewrprB1.a1, sgpsondewrprB4.00, sgpsondewrprB4.a0, sgpsondewrprB4.a1,
sgpsondewrprB5.00, sgpsondewrprB5.a0, sgpsondewrprB5.a1, sgpsondewrprC1.00,
sgpsondewrprC1.a0, sgpsondewrprC1.a1, DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1,
DsgpsondeB4.00, DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1,
DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, DsgpsondenogcptucalcB1.c1,
DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1,
DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1, DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1,
DsgpsondeptuB1.00, DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00,
DsgpsondeptuC1.00, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1, DsgpsondeptucalcB5.c1,
DsgpsondeptucalcC1.c1, sgpsondeB1.00, sgpsondeB1.a0, sgpsondeB1.a1, sgpsondeB4.00, sgpsondeB4.a0,
sgpsondeB4.a1, sgpsondeB5.00, sgpsondeB5.a0, sgpsondeB5.a1, sgpsondeB6.00,
sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, sgpsondeptuC1.00, sgpsondewnpnB1.a0
Description:
Vaisala has confirmed ARM findings of an apparent dry bias in the
relative humidity measured by RS-80H radiosondes.  The cause of
the dry bias is thought to be contamination of the humidity sensor
by volatile organic substances originating from some plastic parts
of the radiosonde.  The amount of contamination is a function of
the time between the date of sonde manufacture and its use.  All
RS-80H sondes manufactured before week 34 of 1998 will show this
bias.  After week 34 of 1998 Vaisala changed its packaging to
reduce, but not eliminate the contamination problem.

Starting with RS-80 radiosonde manufactured in late June 2000 Vaisala
enclosed the sensor boom in an inert plastic shield, thereby eliminating
the contamination that caused the dry bias.

Starting in May 2001 at the SGP, May 2002 at the TWP, and later 2002
at the NSA, ARM has moved to using RS-90 radiosondes.  These sondes
are not subject to the contaminatino that caused the dry bias.

Vaisala is in the process of developing an algorithm that can be 
used to estimate the correct RH from knowledge of the sonde age.
All of the ARM sounding data have sufficient metadata available
to apply the correction.

Additionally, ARM has funded a Science Team effort (Milosevich) to
develop a 'best' correction algorithm for the RS-80 radiosonde humidity
data.  When completed this algorithm will allow us to reprocess the
accumulated RS-80 data and produce a new data platform with what we
hope will be more accurate data.
Measurements:sgpsondeptuC1.00:
  • Raw data stream - documentation not supported

sgpsondeB4.a1:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

sgpsondeB4.a0:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

DsgpsondeptuB4.00:
  • Development raw data stream - documentation not supported

sgpsondewrprB1.00:
  • Raw data stream - documentation not supported

DsgpsondeC1.a1:
  • Development data stream - documentation not supported

DsgpsondeB5.a0:
  • Development data stream - documentation not supported

DsgpsondeC1.a0:
  • Development data stream - documentation not supported

sgpsondewrpnC1.a1:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

sgpsondewnprC1.a1:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

DsgpsondenogcptucalcC1.c1:
  • Development data stream - documentation not supported

sgpsondewrpnB5.00:
  • Raw data stream - documentation not supported

sgpsondewrpnB4.a0:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

sgpsondewnpnB1.a0:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

sgpsondewnpnB1.a1:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

DsgpsondeB5.a1:
  • Development data stream - documentation not supported

sgpsondewrprB4.a1:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

sgpsondewrpnB4.a1:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

DsgpsondeB4.a0:
  • Development data stream - documentation not supported

sgpsondewrpnB6.00:
  • Raw data stream - documentation not supported

DsgpsondeB4.a1:
  • Development data stream - documentation not supported

sgpsondewrprB4.a0:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

DsgpsondeptuB6.00:
  • Development raw data stream - documentation not supported

sgpsondewnpnC1.a0:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

sgpsondewrpnB6.a0:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

DsgpsondeptuB5.00:
  • Development raw data stream - documentation not supported

sgpsondewnpnC1.a1:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

DsgpsondenogcwrpnB4.c1:
  • Development data stream - documentation not supported

DsgpsondeB4.00:
  • Development raw data stream - documentation not supported

sgpsondewrpnB6.a1:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

DsgpsondenogcptucalcB4.c1:
  • Development data stream - documentation not supported

DsgpsondeC1.00:
  • Development raw data stream - documentation not supported

DsgpsondeptuC1.00:
  • Development raw data stream - documentation not supported

DsgpsondeptucalcB1.c1:
  • Development data stream - documentation not supported

sgpsondewrpnB1.a1:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

DsgpsondeptucalcB5.c1:
  • Development data stream - documentation not supported

sgpsondewrpnB1.00:
  • Raw data stream - documentation not supported

sgpsondewrpnB1.a0:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

DsgpsondeptuB1.00:
  • Development raw data stream - documentation not supported

DsgpsondeB1.00:
  • Development raw data stream - documentation not supported

DsgpsondeptucalcB4.c1:
  • Development data stream - documentation not supported

DsgpsondenogcwrpnB5.c1:
  • Development data stream - documentation not supported

sgpsondewrpnB5.a0:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

sgpsondewrpnB5.a1:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

DsgpsondenogcptucalcB1.c1:
  • Development data stream - documentation not supported

sgpsondeC1.00:
  • Raw data stream - documentation not supported

sgpsondewrprB4.00:
  • Raw data stream - documentation not supported

sgpsondeB4.00:
  • Raw data stream - documentation not supported

sgpsondewrprB1.a0:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

sgpsondewrprC1.00:
  • Raw data stream - documentation not supported

sgpsondewrprB1.a1:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

sgpsondewnpnB5.a0:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

sgpsondeB1.a0:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

DsgpsondeB5.00:
  • Development raw data stream - documentation not supported

sgpsondewnpnB5.a1:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

sgpsondeB1.a1:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

sgpsondewnpnB4.a1:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

sgpsondewnpnB6.a0:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

sgpsondewnpnB6.a1:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

sgpsondewnpnB4.a0:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

DsgpsondenogcwrpnB1.c1:
  • Development data stream - documentation not supported

sgpsondeB5.00:
  • Raw data stream - documentation not supported

sgpsondeB6.00:
  • Raw data stream - documentation not supported

DsgpsondenogcptucalcB5.c1:
  • Development data stream - documentation not supported

sgpsondewrprB5.00:
  • Raw data stream - documentation not supported

DsgpsondeptucalcC1.c1:
  • Development data stream - documentation not supported

DsgpsondenogcwrpnC1.c1:
  • Development data stream - documentation not supported

sgpsondeC1.a1:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

sgpsondeC1.a0:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

DsgpsondeB1.a0:
  • Development data stream - documentation not supported

sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported

sgpsondeB5.a0:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

sgpsondewrpnB4.00:
  • Raw data stream - documentation not supported

sgpsondeB5.a1:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

DsgpsondeB1.a1:
  • Development data stream - documentation not supported

sgpsondewrprC1.a1:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

sgpsondewrprB5.a0:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

sgpsondewrprB5.a1:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

sgpsondewrpnC1.a0:
  • Humidity, relative(rh)
  • Dewpoint Temperature(dp)

sgpsondewnprC1.a0:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)

sgpsondeB1.00:
  • Raw data stream - documentation not supported

sgpsondewrprC1.a0:
  • Dewpoint Temperature(dp)
  • Humidity, relative(rh)


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