Data Quality Reports for Session: 108117 User: saraht Completed: 10/03/2007

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D020524.27SGP/SONDE/C1 - CF sounding 20020522:1130 bad temperature/RHsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D020526.1SGP/SONDE/C1 - Bad T/RH data in CF sounding 20020523:1129sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030409.1SGP/Sonde/C1 - Bad RH in soundingsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030411.1SGP/Sonde/C1 - Sondes launched an hour earlysgpsondewnpnC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030411.2SGP/Sonde/C1 - Incorrect surface temperature on CF soundingsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030411.3SGP/Sonde/C1 - Failed Sonde Launches due to Antenna problemssgplssondeC1.c1, sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030419.2SGP/SONDE/C1 - Broken Temperature SensorsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030427.1SGP/SONDE/C1 - Broken temperature sensorsgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D030507.3SGP/SONDE/C1 - Broken temperature sensorssgpsondewnpnC1.a1, sgpsondewnpnC1.b1
D040415.2SGP/SONDE/C1 - Temperature sensor broke high into the soundingsgpsondewnpnC1.b1
D050421.5SGP/SONDE/C1 - Surface pressure incorrectsgpsondewnpnC1.b1
D050510.1SGP/SONDE/C1 - Surface pressure bad and other data noisysgpsondewnpnC1.b1
D050510.2SGP/SONDE/C1 - Surface pressure incorrectsgpsondewnpnC1.b1
D050603.4SGP/SONDE/C1 - Surface pressure incorrectsgpsondewnpnC1.b1
D051121.1SGP/SONDE/C1 - Sonde RH values incorrectsgpsondewnpnC1.b1
D060208.2SGP/SONDE/C1 - Mixed use of RS92-SGP and RS92-KL radiosondessgpsondewnpnC1.b1
D060928.3SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdrysgpsondewnpnC1.b1


DQRID : D020524.27
Start DateStart TimeEnd DateEnd Time
05/22/2002113005/22/20021347
Subject:
SGP/SONDE/C1 - CF sounding 20020522:1130 bad temperature/RH
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
It appears that the sonde sensor boom was damaged upon launch.  The result
is that no RH data are reported and the reported temperature is something on
the order of 60 degC too low.
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
  • Dummy altitude for Zeb(alt)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)

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DQRID : D020526.1
Start DateStart TimeEnd DateEnd Time
05/23/2002112905/23/20021322
Subject:
SGP/SONDE/C1 - Bad T/RH data in CF sounding 20020523:1129
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
It appears that the sensor boom was damaged shortly after launch.  The
temperature reading jumps -60 degC and the RH goes to 0.
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
  • Dummy altitude for Zeb(alt)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)

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DQRID : D030409.1
Start DateStart TimeEnd DateEnd Time
04/06/2003114404/06/20031203
Subject:
SGP/Sonde/C1 - Bad RH in sounding
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The RH sensor heating circuit was out of synch from about 400 sec after launch until the 
circuit was turned off whent he sounding temperature reached approximately 233 degK (-40 
degC) about 1500 sec after launch.  During this time period the reported RH oscillates 
between reasonable values and near-zero values.
Measurements:sgpsondewnpnC1.a1:
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Relative humidity inside the instrument enclosure(rh)

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DQRID : D030411.1
Start DateStart TimeEnd DateEnd Time
04/06/2003220004/07/20030700
Subject:
SGP/Sonde/C1 - Sondes launched an hour early
DataStreams:sgpsondewnpnC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
It looks like someone forgot to set his/her clock ahead.  The sounding that should have 
been done at 23:30 UTC on 4/6 was done at 22:38 and the following sounding, which should 
have been done at 0530 on 4/7 was done at 04:31.  The subsequent soundings all are done at 
the correct times.
Measurements:sgpsondewnpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewnpnC1.a1:
  • Mean Wind Speed(wspd)
  • Dummy altitude for Zeb(alt)
  • V-component(v_wind)
  • base time(base_time)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • Wind Direction(deg)
  • Wind Status(wstat)
  • U-component(u_wind)
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Time offset of tweaks from base_time(time_offset)
  • lat(lat)
  • lon(lon)
  • Retrieved pressure profile(pres)
sgpsondewnpnC1.b1:
  • Mean Wind Speed(wspd)
  • U-component(u_wind)
  • lat(lat)
  • Ascent Rate(asc)
  • lon(lon)
  • Time offset of tweaks from base_time(time_offset)
  • V-component(v_wind)
  • Dummy altitude for Zeb(alt)
  • Surface dew point temperature(dp)
  • base time(base_time)
  • Relative humidity inside the instrument enclosure(rh)
  • Retrieved pressure profile(pres)
  • Wind Direction(deg)
  • Wind Status(wstat)
  • Dry bulb temperature(tdry)

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DQRID : D030411.2
Start DateStart TimeEnd DateEnd Time
04/06/2003223804/06/20032238
Subject:
SGP/Sonde/C1 - Incorrect surface temperature on CF sounding
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
It appears that the operator entered an incorrect value for surface temperature.  Rather 
than 43.2 degC in the file, the value is most likely 19. degC (thwaps reading 19.4, first 
sonde reading aloft 18.6).
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
sgpsondewnpnC1.b1:
  • Dry bulb temperature(tdry)

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DQRID : D030411.3
Start DateStart TimeEnd DateEnd Time
04/01/2003173004/01/20031930
04/02/2003053004/02/20030730
04/02/2003113004/02/20031330
Subject:
SGP/Sonde/C1 - Failed Sonde Launches due to Antenna problems
DataStreams:sgplssondeC1.c1, sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
These sonde launches where unsuccessful due to problems
with the antenna configuration resulting in signal loss
before the launch.
Measurements:sgpsondewnpnC1.a1:
  • Mean Wind Speed(wspd)
  • V-component(v_wind)
  • Dummy altitude for Zeb(alt)
  • base time(base_time)
  • Relative humidity inside the instrument enclosure(rh)
  • Ascent Rate(asc)
  • U-component(u_wind)
  • Wind Status(wstat)
  • Wind Direction(deg)
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Time offset of tweaks from base_time(time_offset)
  • lat(lat)
  • lon(lon)
  • Retrieved pressure profile(pres)
sgpsondewnpnC1.b1:
  • U-component(u_wind)
  • Mean Wind Speed(wspd)
  • lat(lat)
  • Ascent Rate(asc)
  • lon(lon)
  • Time offset of tweaks from base_time(time_offset)
  • V-component(v_wind)
  • Dummy altitude for Zeb(alt)
  • Surface dew point temperature(dp)
  • base time(base_time)
  • Relative humidity inside the instrument enclosure(rh)
  • Retrieved pressure profile(pres)
  • Wind Direction(deg)
  • Wind Status(wstat)
  • Dry bulb temperature(tdry)
sgpsondeC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgplssondeC1.c1:
  • lon(lon)
  • Dummy altitude for Zeb(alt)
  • base time(base_time)
  • Retrieved pressure profile(pres)
  • Relative humidity inside the instrument enclosure(rh)
  • Dry bulb temperature(tdry)
  • lat(lat)
  • Time offset of tweaks from base_time(time_offset)

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DQRID : D030419.2
Start DateStart TimeEnd DateEnd Time
04/15/2003233204/16/20030124
Subject:
SGP/SONDE/C1 - Broken Temperature Sensor
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The temperature sensor broke shortly after launch as a result all variables that are 
affected by temperature are incorrect.
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)

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DQRID : D030427.1
Start DateStart TimeEnd DateEnd Time
04/18/2003113004/18/20031310
Subject:
SGP/SONDE/C1 - Broken temperature sensor
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The temperature sensor on this radiosonde broke after launch.  All temperature-related 
variables (dp, tdry, rh) are incorrect.
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)

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DQRID : D030507.3
Start DateStart TimeEnd DateEnd Time
05/04/2003113005/04/20031145
05/04/2003233005/05/20030116
Subject:
SGP/SONDE/C1 - Broken temperature sensors
DataStreams:sgpsondewnpnC1.a1, sgpsondewnpnC1.b1
Description:
The temperature sensors broke at launch on both of these soundings.  All of the 
temperature-related data (tdry, rh, dp) are incorrect.
Measurements:sgpsondewnpnC1.a1:
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Surface dew point temperature(dp)
sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)

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DQRID : D040415.2
Start DateStart TimeEnd DateEnd Time
04/13/2004122904/13/20041301
Subject:
SGP/SONDE/C1 - Temperature sensor broke high into the sounding
DataStreams:sgpsondewnpnC1.b1
Description:
The temperature sensor on this radiosonde appeared to break 56 minutes and 22 seconds into 
the sounding at an altitude of 16570 m.  All the data below this point are good; only 
the data above this point to the end of the sounding (88 minutes and 14 seconds) are bad.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)

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DQRID : D050421.5
Start DateStart TimeEnd DateEnd Time
04/11/2005174904/11/20051920
Subject:
SGP/SONDE/C1 - Surface pressure incorrect
DataStreams:sgpsondewnpnC1.b1
Description:
I think the operator inadvdertently entered an incorrect surface pressure value.  The 
value entered is 988.8 hPa but the value shown in the raw data file at launch is 968.8.  As a 
result, the absolute altitudes in this sounding will be slightly incorrect as will be 
the ascent rate during the first 30 seconds of flight.
Measurements:sgpsondewnpnC1.b1:
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)

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DQRID : D050510.1
Start DateStart TimeEnd DateEnd Time
04/26/2005172604/26/20051910
Subject:
SGP/SONDE/C1 - Surface pressure bad and other data noisy
DataStreams:sgpsondewnpnC1.b1
Description:
I was checking this sounding because the surface pressure entered by the operator was 
considerably higher than that recorded by the TWHAPS and SMOS.  I'm not sure why, but the 
pressure data are very noisy while the sonde is on the ground (which accounts for the 
incorrect surface pressure) and the RH data aloft do not look terrible but do not look great 
either.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • base time(base_time)
  • Mean Wind Speed(wspd)
  • U-component(u_wind)
  • Relative humidity inside the instrument enclosure(rh)
  • lat(lat)
  • Ascent Rate(asc)
  • Retrieved pressure profile(pres)
  • Wind Direction(deg)
  • Wind Status(wstat)
  • lon(lon)
  • Dry bulb temperature(tdry)
  • Time offset of tweaks from base_time(time_offset)
  • V-component(v_wind)
  • Dummy altitude for Zeb(alt)

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DQRID : D050510.2
Start DateStart TimeEnd DateEnd Time
04/29/2005232904/30/20050111
Subject:
SGP/SONDE/C1 - Surface pressure incorrect
DataStreams:sgpsondewnpnC1.b1
Description:
I think the operator inadvdertently typed an 89 instead of a 78 when entering the surface 
pressure value.  The value entered is 989.9 hPa but the value shown in the raw data file 
at launch is 978.9.  As a result, the absolute altitudes in this sounding will be 
slightly incorrect as will be the ascent rate during the first 30 seconds of flight.
Measurements:sgpsondewnpnC1.b1:
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)

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DQRID : D050603.4
Start DateStart TimeEnd DateEnd Time
05/11/2005053005/11/20050750
Subject:
SGP/SONDE/C1 - Surface pressure incorrect
DataStreams:sgpsondewnpnC1.b1
Description:
I think the operator inadvdertently mistyped a digit when entering the surface pressure 
value.  The value entered is 975.6 hPa but the value shown in the raw data file at launch 
is 972.6.  As a result, the absolute altitudes in this sounding will be slightly incorrect 
as will be the ascent rate during the first 30 seconds of flight.
Measurements:sgpsondewnpnC1.b1:
  • Ascent Rate(asc)
  • Dummy altitude for Zeb(alt)

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DQRID : D051121.1
Start DateStart TimeEnd DateEnd Time
04/13/2005234604/15/20051732
Subject:
SGP/SONDE/C1 - Sonde RH values incorrect
DataStreams:sgpsondewnpnC1.b1
Description:
RH values for all sondes launched during this time were incorrect due to a faulty Ground 
Check set which damaged or conditioned the RH sensor improperly.
Measurements:sgpsondewnpnC1.b1:
  • Surface dew point temperature(dp)
  • Relative humidity inside the instrument enclosure(rh)

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DQRID : D060208.2
Start DateStart TimeEnd DateEnd Time
02/10/2006000012/31/20062359
Subject:
SGP/SONDE/C1 - Mixed use of RS92-SGP and RS92-KL radiosondes
DataStreams:sgpsondewnpnC1.b1
Description:
Because of a manufacturer's production problem, we will be using both RS92-SGP (GPS 
windfinding and RS92-KL (Loran windfinding) radiosondes at the SGP/CF starting February 10, 
2006.  The radiosonde type used for the each sounding may be determined by looking the 
metadata variable "launch_status" in the netCDF data files.
Measurements:sgpsondewnpnC1.b1:
  • lon(lon)
  • U-component(u_wind)
  • Mean Wind Speed(wspd)
  • V-component(v_wind)
  • lat(lat)
  • Wind Direction(deg)
  • Wind Status(wstat)

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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:
  • Surface dew point temperature(dp)
  • Dry bulb temperature(tdry)
  • Relative humidity inside the instrument enclosure(rh)
  • Retrieved pressure profile(pres)
  • Dummy altitude for Zeb(alt)

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