Data Quality Reports for Session: 103511 User: kfernandes Completed: 01/04/2007

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D021110.2SGP/SONDE/B4 - Soundings contaminated by interferencesgplssondeB4.c1, sgpqmemwrcolB4.c1, sgpsondewnpnB4.a1, sgpsondewnpnB4.b1
D021112.2SGP/SONDE/B4 - Possible interference in B4 sounding 20021110.1729sgpsondeB4.00, sgpsondewnpnB4.a1, sgpsondewnpnB4.b1
D021117.2SGP/SONDE/B4 - B4 sounding contaminated by interferencesgpsondeB4.00, sgpsondewnpnB4.a1, sgpsondewnpnB4.b1
D990124.2SGP/SONDE - Dry bias in sonde RHsgpsondeB1.00, sgpsondeB1.a0, sgpsondeB1.a1, sgpsondeB4.00, sgpsondeB4.a0, sgpsondeB4.a1,
sgpsondeB5.00, sgpsondeB5.a0, sgpsondeB5.a1, sgpsondeB6.00, sgpsondeC1.00,
sgpsondeC1.a0, sgpsondeC1.a1, DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00,
DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1,
DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, sgpsondeptuC1.00, DsgpsondeptuB1.00,
DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, sgpsondewnpnB1.a0,
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, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1,
DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1,
DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondenogcptucalcB1.c1,
DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1


DQRID : D021110.2
Start DateStart TimeEnd DateEnd Time
11/07/2002113011/07/20021316
11/07/2002142911/07/20021629
11/07/2002173011/07/20021930
11/07/2002202911/07/20022239
11/07/2002233111/08/20020131
Subject:
SGP/SONDE/B4 - Soundings contaminated by interference
DataStreams:sgplssondeB4.c1, sgpqmemwrcolB4.c1, sgpsondewnpnB4.a1, sgpsondewnpnB4.b1
Description:
These five soundings, done in succession on 11/07/2002 as part of the SCM/IOP are 
contaminated by interference.  I can't tell whether the problem has to do with improper tuning of 
the radiosondes, inadequate frequency separation among radiosondes launched from 
different locations, or some other operator problem.  I suspect that there is an operator 
component to the difficulty because the surface pressure is given as an unreasonably low 896.6 
hPa on the 1730 sounding and 886.1 hPa on the 2331 sounding.  This may indicate that the 
ground station was locked another station's radiosonde rather than on the B4 radiosonde.
Measurements:sgplssondeB4.c1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • east longitude for all the input platforms.(lon)
  • pressure at constant pressure surface(pres)
  • north latitude for all the input platforms.(lat)
  • Dry-Bulb Temperature(tdry)
  • altitude above sea levelaltunits(alt)
sgpqmemwrcolB4.c1:
  • maximum height attained by the balloon in pressure units(max_height_sonde)
  • MWR IPM output for 23.8 GHz sky brightness temperature using sonde T,P,RH(model_tbsky23)
  • Integrated vapor column from sonde using MWR Instrument Performance Model (IPM)(integ_vap_sonde)
  • MWR IPM output for atmospheric mean radiating temp using sonde T,P,RH(model_tmr31)
  • MWR IPM output for 31.4 GHz sky brightness temperature using sonde T,P,RH(model_tbsky31)
  • MWR IPM output for atmospheric mean radiating temp using sonde T,P,RH(model_tmr23)
sgpsondewnpnB4.a1:
  • surface wind speed(wspd)
  • Surface dew point temperature(dp)
  • east longitude for all the input platforms.(lon)
  • north latitude for all the input platforms.(lat)
  • model meridional wind velocity(v_wind)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • pressure at constant pressure surface(pres)
  • Ascent Rate(asc)
  • altitude above sea levelaltunits(alt)
  • Wind Direction(deg)
sgpsondewnpnB4.b1:
  • altitude above sea levelaltunits(alt)
  • north latitude for all the input platforms.(lat)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • surface wind speed(wspd)
  • Dry-Bulb Temperature(tdry)
  • Surface dew point temperature(dp)
  • model meridional wind velocity(v_wind)
  • east longitude for all the input platforms.(lon)
  • Ascent Rate(asc)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • model zonal wind velocity(u_wind)

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DQRID : D021112.2
Start DateStart TimeEnd DateEnd Time
11/10/2002182411/10/20021848
Subject:
SGP/SONDE/B4 - Possible interference in B4 sounding 20021110.1729
DataStreams:sgpsondeB4.00, sgpsondewnpnB4.a1, sgpsondewnpnB4.b1
Description:
There is a strange inversion aloft in the subject sounding.  The
temperature goes from -56.3 degC to -51.5 degC in less than two
minutes (approximately .72 km).  This is somewhat below the estimated
tropopause height.  I suspect this may be an interference problem,
but note that both the recorded pressure and RH values are reasonably
continuous.  More accurate assessment would require analysis of the
absolutely raw binary data; something that would require effort beyond
the limits of my IM funding.
Measurements:sgpsondeB4.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewnpnB4.a1:
  • surface wind speed(wspd)
  • Surface dew point temperature(dp)
  • east longitude for all the input platforms.(lon)
  • Wind Status(wstat)
  • north latitude for all the input platforms.(lat)
  • model meridional wind velocity(v_wind)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • pressure at constant pressure surface(pres)
  • Ascent Rate(asc)
  • Time offset from base_time(base_time)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Direction(deg)
  • altitude above sea levelaltunits(alt)
sgpsondewnpnB4.b1:
  • Time offset from base_time(base_time)
  • altitude above sea levelaltunits(alt)
  • north latitude for all the input platforms.(lat)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • surface wind speed(wspd)
  • Dry-Bulb Temperature(tdry)
  • Time offset of tweaks from base_time(time_offset)
  • Surface dew point temperature(dp)
  • model meridional wind velocity(v_wind)
  • east longitude for all the input platforms.(lon)
  • Ascent Rate(asc)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • model zonal wind velocity(u_wind)
  • Wind Status(wstat)

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DQRID : D021117.2
Start DateStart TimeEnd DateEnd Time
11/14/2002083011/14/20021010
Subject:
SGP/SONDE/B4 - B4 sounding contaminated by interference
DataStreams:sgpsondeB4.00, sgpsondewnpnB4.a1, sgpsondewnpnB4.b1
Description:
Much of this sounding is contaminated, apparently by interference from another sonde 
signal.  It is still no clear why this seems to happen more frequently at B4 than the other 
sites, especially since the wind seems to have been from the west and B4 should be the most 
upwind station.
Measurements:sgpsondeB4.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewnpnB4.a1:
  • surface wind speed(wspd)
  • Surface dew point temperature(dp)
  • east longitude for all the input platforms.(lon)
  • Wind Status(wstat)
  • north latitude for all the input platforms.(lat)
  • model meridional wind velocity(v_wind)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • pressure at constant pressure surface(pres)
  • Ascent Rate(asc)
  • Time offset from base_time(base_time)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Direction(deg)
  • altitude above sea levelaltunits(alt)
sgpsondewnpnB4.b1:
  • Time offset from base_time(base_time)
  • altitude above sea levelaltunits(alt)
  • north latitude for all the input platforms.(lat)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • surface wind speed(wspd)
  • Dry-Bulb Temperature(tdry)
  • Time offset of tweaks from base_time(time_offset)
  • Surface dew point temperature(dp)
  • model meridional wind velocity(v_wind)
  • east longitude for all the input platforms.(lon)
  • Ascent Rate(asc)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • model zonal wind velocity(u_wind)
  • Wind Status(wstat)

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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: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, DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00,
DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1,
DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, sgpsondeptuC1.00, DsgpsondeptuB1.00,
DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, sgpsondewnpnB1.a0,
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, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1,
DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1,
DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondenogcptucalcB1.c1,
DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1
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:sgpsondeB4.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
DsgpsondeB5.00:
  • (Development raw data stream - documentation not supported)
sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewnpnC1.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
DsgpsondeptuB6.00:
  • (Development raw data stream - documentation not supported)
DsgpsondenogcptucalcB1.c1:
  • (Development data stream - documentation not supported)
sgpsondewrpnB6.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
DsgpsondeptuC1.00:
  • (Development raw data stream - documentation not supported)
sgpsondewnprC1.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
DsgpsondenogcptucalcB5.c1:
  • (Development data stream - documentation not supported)
DsgpsondeptucalcC1.c1:
  • (Development data stream - documentation not supported)
sgpsondewnpnB4.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
sgpsondeB6.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrprB4.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
DsgpsondeptuB1.00:
  • (Development raw data stream - documentation not supported)
DsgpsondenogcptucalcC1.c1:
  • (Development data stream - documentation not supported)
sgpsondewrpnC1.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
sgpsondewrpnB1.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpsondewrprC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrpnB1.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
sgpsondewrprB5.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
sgpsondeB5.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpsondewrprB5.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
DsgpsondeC1.00:
  • (Development raw data stream - documentation not supported)
sgpsondewrprB1.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpsondeB1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondeptuC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
DsgpsondenogcptucalcB4.c1:
  • (Development data stream - documentation not supported)
DsgpsondeB1.a0:
  • (Development data stream - documentation not supported)
DsgpsondeC1.a1:
  • (Development data stream - documentation not supported)
DsgpsondeptucalcB5.c1:
  • (Development data stream - documentation not supported)
sgpsondewrprB1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrpnC1.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpsondewrpnB1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondeB1.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
DsgpsondeC1.a0:
  • (Development data stream - documentation not supported)
DsgpsondeB4.a1:
  • (Development data stream - documentation not supported)
DsgpsondeptuB4.00:
  • (Development raw data stream - documentation not supported)
sgpsondeB1.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
sgpsondewrprB5.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
sgpsondeC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewnpnB1.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpsondewrpnB6.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
sgpsondewrprC1.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
sgpsondeC1.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpsondewrprC1.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
DsgpsondeptuB5.00:
  • (Development raw data stream - documentation not supported)
sgpsondewrpnB5.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpsondewrprB4.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
DsgpsondeB1.a1:
  • (Development data stream - documentation not supported)
sgpsondeB5.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpsondewnpnB6.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
DsgpsondeB5.a1:
  • (Development data stream - documentation not supported)
DsgpsondenogcwrpnB1.c1:
  • (Development data stream - documentation not supported)
sgpsondewrprB1.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
sgpsondewrpnB5.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
DsgpsondeB4.a0:
  • (Development data stream - documentation not supported)
DsgpsondenogcwrpnB4.c1:
  • (Development data stream - documentation not supported)
DsgpsondeB5.a0:
  • (Development data stream - documentation not supported)
sgpsondewnpnB4.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
sgpsondewnprC1.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
sgpsondewrpnB5.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpsondewnpnB5.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
DsgpsondeB4.00:
  • (Development raw data stream - documentation not supported)
sgpsondewrpnB6.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrprB4.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpsondewnpnB1.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
sgpsondeB4.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpsondeC1.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
sgpsondewrpnB4.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
DsgpsondenogcwrpnB5.c1:
  • (Development data stream - documentation not supported)
sgpsondewnpnC1.a0:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpsondewrpnB4.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
DsgpsondeB1.00:
  • (Development raw data stream - documentation not supported)
sgpsondeB4.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
sgpsondewnpnB6.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpsondewrpnB4.a1:
  • Surface dew point temperature(dp)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpsondewnpnB5.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
DsgpsondeptucalcB4.c1:
  • (Development data stream - documentation not supported)
DsgpsondenogcwrpnC1.c1:
  • (Development data stream - documentation not supported)
sgpsondeB5.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
DsgpsondeptucalcB1.c1:
  • (Development data stream - documentation not supported)

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