Data Quality Reports for Session: 105502 User: tjwagner Completed: 05/04/2007

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D000219.1SGP/SONDE/C1 - Incorrect surface temperaturesgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D000308.1SGP/SONDE - Questionable absolute pressuressgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D000308.2SGP/SONDE - Questionable absolute pressuressgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D000625.1SGP/SONDE/C1 - Operator used wrong calibration tapesgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0,
sgpsondewrpnC1.a1, sgpsondewndcalcC1.c1
D000801.2SGP/SONDE/C1 - Incorrect absolute pressuresgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewndcalcC1.c1
D001107.1SGP/SONDE/C1 - Incorrect surface temperaturesgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D980126.1Incorrect radiosonde serial numberssgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1,
sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.a0,
sgpsondewrpnC1.a1
D980126.2Incorrect surface temperature and humiditysgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D980506.1Incorrect surface valuessgpsondewrpnC1.a1
D980507.4Incorrect surface pressuresgpsondewrpnC1.a1
D980511.2Incorrect surface pressuresgpsondewrpnC1.a1
D980716.1Bad soundingsgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D980917.1Incorrect surface readingssgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D980917.2Incorrect surface RHsgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
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
D990210.1SGP/SONDE - Wrong cal tapesgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewndcalcC1.c1
D990303.1SGP/SONDE - Pressure jump at launchsgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D990329.1Incorrect surface RHsgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D990513.1SGP/SONDE - RH probably biased low in several soundingssgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D991221.1SGP/SONDE - Incorrect surface temperaturesgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
D991228.1SGP/SONDE - Incorrect surface temperaturesgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1


DQRID : D000219.1
Start DateStart TimeEnd DateEnd Time
02/17/2000233002/17/20002330
Subject:
SGP/SONDE/C1 - Incorrect surface temperature
DataStreams:sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:
It appears as if the operator mis-typed the temperature when entering the
surface values into the system.  The value appears as 89.0 degC instead of
8.9 degC.  Also note that there are no RH data in this sounding other than
the initial value of 100%.  The reason for this loss of RH is unknown.
Measurements:sgpsondewrpnC1.a0:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Surface dew point temperature(dp)
  • Dry-Bulb Temperature(tdry)
sgpsondewrpnC1.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Dry-Bulb Temperature(tdry)
  • Surface dew point temperature(dp)

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DQRID : D000308.1
Start DateStart TimeEnd DateEnd Time
03/03/2000232803/04/20000051
Subject:
SGP/SONDE - Questionable absolute pressures
DataStreams:sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:
The sonde surface pressure reading was considerably higher than the
corresponding THWAPS pressure (988.0 hPa vs 982.3 hPa).  The sonde
readings are consistent during the sounding, however, suggesting that
this is not a case of a pressure jump at launch but one of sensor offset.
This problem will only affect those who use the absolute pressure values.
The file altitudes, which are based on the relative pressure changes
from the surface, should be fine.
Measurements:sgpsondewrpnC1.a0:
  • pressure at constant pressure surface(pres)
sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrpnC1.a1:
  • pressure at constant pressure surface(pres)

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DQRID : D000308.2
Start DateStart TimeEnd DateEnd Time
03/04/2000022903/04/20000359
Subject:
SGP/SONDE - Questionable absolute pressures
DataStreams:sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:
The sonde surface pressure reading was considerably higher than the
corresponding THWAPS pressure (992.9 hPa vs 983.0 hPa).  The sonde
readings are consistent during the sounding, however, suggesting that
this is not a case of a pressure jump at launch but one of sensor offset.
This problem will only affect those who use the absolute pressure values.
The file altitudes, which are based on the relative pressure changes
from the surface, should be fine.
Measurements:sgpsondewrpnC1.a0:
  • pressure at constant pressure surface(pres)
sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrpnC1.a1:
  • pressure at constant pressure surface(pres)

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DQRID : D000625.1
Start DateStart TimeEnd DateEnd Time
06/23/2000233006/24/20000100
Subject:
SGP/SONDE/C1 - Operator used wrong calibration tape
DataStreams:sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0,
sgpsondewrpnC1.a1, sgpsondewndcalcC1.c1
Description:
It appears as if the operators had a problem with the original sounding
and launched a second radiosonde.  Apparently they used the calibration
tape that came with the first radiosonde (serial number 943156405) in
place of the one that was correct for the second radiosonde (sn 943156406)
and all the data are bad after the first sample (surface values).
Measurements:sgpsondewrpnC1.a0:
  • pressure at constant pressure surface(pres)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • surface wind speed(wspd)
  • Ascent Rate(asc)
  • Dry-Bulb Temperature(tdry)
  • east longitude for all the input platforms.(lon)
  • Wind Status(wstat)
  • Surface dew point temperature(dp)
  • north latitude for all the input platforms.(lat)
  • altitude above sea levelaltunits(alt)
  • Wind Direction(deg)
  • Time offset of tweaks from base_time(time_offset)
  • Time offset from base_time(base_time)
sgpsondeC1.a0:
  • altitude above sea levelaltunits(alt)
  • Surface dew point temperature(dp)
  • Ascent Rate(asc)
  • Dry-Bulb Temperature(tdry)
  • Wind Status(wstat)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • surface wind speed(wspd)
  • north latitude for all the input platforms.(lat)
  • Time offset from base_time(base_time)
  • east longitude for all the input platforms.(lon)
  • pressure at constant pressure surface(pres)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Direction(deg)
sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewndcalcC1.c1:
  • W-to-E Component of wind, calculated(u_wind_calc)
  • east longitude for all the input platforms.(lon)
  • north latitude for all the input platforms.(lat)
  • Flags for input v_wind values(v_wind_flags)
  • Flags for input u_wind values(u_wind_flags)
  • Time offset from base_time(base_time)
  • S-to-N Component of Wind, calculated(v_wind_calc)
  • pressure at constant pressure surface(pres)
  • Time offset of tweaks from base_time(time_offset)
  • altitude above sea levelaltunits(alt)
sgpsondeC1.a1:
  • altitude above sea levelaltunits(alt)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Ascent Rate(asc)
  • Time offset from base_time(base_time)
  • surface wind speed(wspd)
  • model zonal wind velocity(u_wind)
  • Wind Status(wstat)
  • Wind Direction(deg)
  • Surface dew point temperature(dp)
  • pressure at constant pressure surface(pres)
  • east longitude for all the input platforms.(lon)
  • Time offset of tweaks from base_time(time_offset)
  • north latitude for all the input platforms.(lat)
  • Dry-Bulb Temperature(tdry)
  • model meridional wind velocity(v_wind)
sgpsondeC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrpnC1.a1:
  • Ascent Rate(asc)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • altitude above sea levelaltunits(alt)
  • Wind Direction(deg)
  • north latitude for all the input platforms.(lat)
  • east longitude for all the input platforms.(lon)
  • model meridional wind velocity(v_wind)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Status(wstat)
  • pressure at constant pressure surface(pres)
  • model zonal wind velocity(u_wind)
  • Dry-Bulb Temperature(tdry)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • surface wind speed(wspd)

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DQRID : D000801.2
Start DateStart TimeEnd DateEnd Time
07/25/2000053307/25/20000724
Subject:
SGP/SONDE/C1 - Incorrect absolute pressure
DataStreams:sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewndcalcC1.c1
Description:
The surface pressure (983.5 hPa) reported by this radiosonde (sn 94315713)
is substantially higher than that reported by the THWAPS (~977) or by the
sondes used in the previous and following soundings (976.6, 977.3).  This
may be a calibration problem or a mechanic problem on launch.  The pressure
values reported in the remainder of the sounding are consistent with the
reported surface pressure, so the altitudes should be correct.  The
absolute pressure values may be high by about 5 hPa.
Measurements:sgpsondewrpnC1.a0:
  • pressure at constant pressure surface(pres)
sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewndcalcC1.c1:
  • pressure at constant pressure surface(pres)
sgpsondewrpnC1.a1:
  • pressure at constant pressure surface(pres)

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DQRID : D001107.1
Start DateStart TimeEnd DateEnd Time
11/03/2000203011/03/20002030
Subject:
SGP/SONDE/C1 - Incorrect surface temperature
DataStreams:sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:
The value for air temperature at the surface in this file is 23.3 degC.  This value is too 
high and resulted from incorrect data entry (typographic mistake) by the operator.  The 
true value as determined from the operator pre-launch logs is 12.3 degC.
Measurements:sgpsondewrpnC1.a0:
  • Dry-Bulb Temperature(tdry)
sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrpnC1.a1:
  • Dry-Bulb Temperature(tdry)

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DQRID : D980126.1
Start DateStart TimeEnd DateEnd Time
01/01/1998000012/31/19992359
Subject:
Incorrect radiosonde serial numbers
DataStreams:sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1,
sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.a0,
sgpsondewrpnC1.a1
Description:
Radiosondes manufactured at Vaisala's Woburn, MA factory during the first
of January 1998 have incorrect serial numbers.  Instead of being numbered
8012XXXXX these sondes are numbered 7012XXXXX.  Vaisala has been informed
of this, has confirmed the problem, and has corrected their numbering for
all subsequent sondes.  163 incorrectly numbered sondes were shipped to ARM
on 1/9/98.  Some have been used at the CF since 1/19/98:1430.
Measurements:sgpsondewrpnC1.a0:
  • surface wind speed(wspd)
  • Ascent Rate(asc)
  • east longitude for all the input platforms.(lon)
  • Surface dew point temperature(dp)
  • north latitude for all the input platforms.(lat)
  • altitude above sea levelaltunits(alt)
  • Time offset of tweaks from base_time(time_offset)
  • pressure at constant pressure surface(pres)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Dry-Bulb Temperature(tdry)
  • Wind Status(wstat)
  • Wind Direction(deg)
  • Time offset from base_time(base_time)
sgpsondewrpnB5.a1:
  • Ascent Rate(asc)
  • Dry-Bulb Temperature(tdry)
  • pressure at constant pressure surface(pres)
  • Time offset from base_time(base_time)
  • Wind Direction(deg)
  • Time offset of tweaks from base_time(time_offset)
  • altitude above sea levelaltunits(alt)
  • north latitude for all the input platforms.(lat)
  • model meridional wind velocity(v_wind)
  • surface wind speed(wspd)
  • Surface dew point temperature(dp)
  • east longitude for all the input platforms.(lon)
  • model zonal wind velocity(u_wind)
  • Wind Status(wstat)
  • Relative humidity scaled, by total column amount from MWR(rh)
sgpsondewrpnB4.a0:
  • Time offset of tweaks from base_time(time_offset)
  • Dry-Bulb Temperature(tdry)
  • pressure at constant pressure surface(pres)
  • surface wind speed(wspd)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • altitude above sea levelaltunits(alt)
  • Wind Status(wstat)
  • Ascent Rate(asc)
  • east longitude for all the input platforms.(lon)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • Wind Direction(deg)
  • north latitude for all the input platforms.(lat)
sgpsondewrpnB1.a0:
  • Wind Direction(deg)
  • north latitude for all the input platforms.(lat)
  • Ascent Rate(asc)
  • surface wind speed(wspd)
  • Dry-Bulb Temperature(tdry)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • altitude above sea levelaltunits(alt)
  • pressure at constant pressure surface(pres)
  • Wind Status(wstat)
  • Time offset from base_time(base_time)
  • Time offset of tweaks from base_time(time_offset)
  • Surface dew point temperature(dp)
  • east longitude for all the input platforms.(lon)
sgpsondewrpnB6.a0:
  • north latitude for all the input platforms.(lat)
  • Time offset from base_time(base_time)
  • Wind Direction(deg)
  • Surface dew point temperature(dp)
  • surface wind speed(wspd)
  • east longitude for all the input platforms.(lon)
  • Time offset of tweaks from base_time(time_offset)
  • altitude above sea levelaltunits(alt)
  • Ascent Rate(asc)
  • Wind Status(wstat)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • pressure at constant pressure surface(pres)
  • Dry-Bulb Temperature(tdry)
sgpsondewrpnB5.a0:
  • Time offset of tweaks from base_time(time_offset)
  • Wind Direction(deg)
  • Time offset from base_time(base_time)
  • Dry-Bulb Temperature(tdry)
  • altitude above sea levelaltunits(alt)
  • Ascent Rate(asc)
  • Surface dew point temperature(dp)
  • Wind Status(wstat)
  • north latitude for all the input platforms.(lat)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • east longitude for all the input platforms.(lon)
  • pressure at constant pressure surface(pres)
  • surface wind speed(wspd)
sgpsondewrpnB4.a1:
  • Wind Status(wstat)
  • Time offset of tweaks from base_time(time_offset)
  • model meridional wind velocity(v_wind)
  • Surface dew point temperature(dp)
  • north latitude for all the input platforms.(lat)
  • Wind Direction(deg)
  • surface wind speed(wspd)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • pressure at constant pressure surface(pres)
  • Dry-Bulb Temperature(tdry)
  • Ascent Rate(asc)
  • east longitude for all the input platforms.(lon)
  • model zonal wind velocity(u_wind)
  • altitude above sea levelaltunits(alt)
  • Time offset from base_time(base_time)
sgpsondewrpnB6.a1:
  • surface wind speed(wspd)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • east longitude for all the input platforms.(lon)
  • altitude above sea levelaltunits(alt)
  • pressure at constant pressure surface(pres)
  • Wind Status(wstat)
  • Time offset from base_time(base_time)
  • model meridional wind velocity(v_wind)
  • Time offset of tweaks from base_time(time_offset)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Wind Direction(deg)
  • Surface dew point temperature(dp)
  • Ascent Rate(asc)
  • north latitude for all the input platforms.(lat)
sgpsondewrpnC1.a1:
  • Relative humidity scaled, by total column amount from MWR(rh)
  • north latitude for all the input platforms.(lat)
  • east longitude for all the input platforms.(lon)
  • model zonal wind velocity(u_wind)
  • Dry-Bulb Temperature(tdry)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • Ascent Rate(asc)
  • altitude above sea levelaltunits(alt)
  • Wind Direction(deg)
  • model meridional wind velocity(v_wind)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Status(wstat)
  • pressure at constant pressure surface(pres)
  • surface wind speed(wspd)
sgpsondewrpnB1.a1:
  • Wind Direction(deg)
  • Dry-Bulb Temperature(tdry)
  • Wind Status(wstat)
  • Ascent Rate(asc)
  • model zonal wind velocity(u_wind)
  • Surface dew point temperature(dp)
  • Time offset of tweaks from base_time(time_offset)
  • pressure at constant pressure surface(pres)
  • east longitude for all the input platforms.(lon)
  • north latitude for all the input platforms.(lat)
  • model meridional wind velocity(v_wind)
  • altitude above sea levelaltunits(alt)
  • surface wind speed(wspd)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Time offset from base_time(base_time)

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DQRID : D980126.2
Start DateStart TimeEnd DateEnd Time
01/19/1998113001/19/19981130
Subject:
Incorrect surface temperature and humidity
DataStreams:sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:
Incorrect values of surface temperature and relative humidity were entered
by the operator.  The surface temperature was entered as 17.5 degC; the
first value reported by the sonde was -3.6 degC.  The surface humidity
was entered as 26; the first value reported by the sonde was 81%. It
appears that the operator used the inside temperature/humidity rather
than the sonde-reported outside temperature/humidity.

Only the first few samples of the sounding will be affected.  Note that
the delta-check QC flag is set by this error.
Measurements:sgpsondewrpnC1.a0:
  • pressure at constant pressure surface(pres)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • north latitude for all the input platforms.(lat)
  • surface wind speed(wspd)
  • Ascent Rate(asc)
  • altitude above sea levelaltunits(alt)
  • Dry-Bulb Temperature(tdry)
  • east longitude for all the input platforms.(lon)
  • Wind Status(wstat)
  • Wind Direction(deg)
  • Surface dew point temperature(dp)
  • Time offset of tweaks from base_time(time_offset)
  • Time offset from base_time(base_time)
sgpsondewrpnC1.a1:
  • east longitude for all the input platforms.(lon)
  • model meridional wind velocity(v_wind)
  • Ascent Rate(asc)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Status(wstat)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • altitude above sea levelaltunits(alt)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • surface wind speed(wspd)
  • north latitude for all the input platforms.(lat)

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DQRID : D980506.1
Start DateStart TimeEnd DateEnd Time
04/29/1998143104/29/19981431
Subject:
Incorrect surface values
DataStreams:sgpsondewrpnC1.a1
Description:
The surface pressure, temperature, and relative humidity are incorrect for
this soundings.  The values in the sounding netCDF file (975.6, 3.2, 86)
are different from the surface observations in the site ops log (978.9,
9.1, and 83) and from the values in the raw radiosonde data file at
the moment just before ascent (978.7, 9.5, 83).  The reason for the
differences are unknown, but insofar as the surface values are manually
entered by the operator into both the log (where they are correct) and
into the sounding file (where they are incorrect) an operator
miscue is a possibility.

The major effect of this problem will be incorrect absolute altitude.
Measurements:sgpsondewrpnC1.a1:
  • Wind Status(wstat)
  • east longitude for all the input platforms.(lon)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • model meridional wind velocity(v_wind)
  • Ascent Rate(asc)
  • altitude above sea levelaltunits(alt)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • surface wind speed(wspd)
  • north latitude for all the input platforms.(lat)

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DQRID : D980507.4
Start DateStart TimeEnd DateEnd Time
05/06/1998083205/06/19980832
Subject:
Incorrect surface pressure
DataStreams:sgpsondewrpnC1.a1
Description:
The operator transposed the digits of the surface pressure entering 976.3
instead of 967.3.  The ops log shows 967.3 for the sonde and 968.3 for
the THWAPS.  Analysis of the absolutely raw sonde data shows 968.0 at
the system-identified launch time.

Note that because the output pressure data are smoothed, under the
assumption that the surface data value is true, the first value
reported by the sonde after launch 970.4 also is incorrect.  The raw
value corresponding to the sample after launch is 966.6.

The absolute pressure values will be incorrect for the first few samples
of the sounding, as will be the ascent rates for the first 30 seconds.
The absolute altitude values also will be in error.
Measurements:sgpsondewrpnC1.a1:
  • Wind Status(wstat)
  • east longitude for all the input platforms.(lon)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • model meridional wind velocity(v_wind)
  • Ascent Rate(asc)
  • altitude above sea levelaltunits(alt)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • surface wind speed(wspd)
  • north latitude for all the input platforms.(lat)

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DQRID : D980511.2
Start DateStart TimeEnd DateEnd Time
05/09/1998143105/09/19981431
Subject:
Incorrect surface pressure
DataStreams:sgpsondewrpnC1.a1
Description:
The operator entered 960.2 for the surface pressure in both the log and
the system.  The first reading from the sonde is 950.9.  Examination of
the absolutely raw data shows that the sonde pressure before launch was
952.3.  The THWAPS reading was 964.2.  From the raw data it appears that
either the system was not reset before this sounding or that a second
sonde was started without resetting the system.  The sonde pressure
may be low in absolute terms or the operator may have mis-entered the
actual sonde reading.  In either case the absolute altitude will be wrong
in this sounding and the ascent rates will be incorrect for the first
30 seconds.
Measurements:sgpsondewrpnC1.a1:
  • Wind Status(wstat)
  • east longitude for all the input platforms.(lon)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • model meridional wind velocity(v_wind)
  • Ascent Rate(asc)
  • altitude above sea levelaltunits(alt)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • surface wind speed(wspd)
  • north latitude for all the input platforms.(lat)

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DQRID : D980716.1
Start DateStart TimeEnd DateEnd Time
07/14/1998234607/14/19982346
Subject:
Bad sounding
DataStreams:sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:
Data from this sounding look very fragmented as if only a few actual points
were collected and intermediate points were intepolated.  In a general
sense this sounding looks 'weird' and should not be trusted.  I do not yet
have access to r1 so I can't look at the raw data, but I doubt that it will
shed much light on the situation.
Measurements:sgpsondewrpnC1.a0:
  • pressure at constant pressure surface(pres)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • north latitude for all the input platforms.(lat)
  • surface wind speed(wspd)
  • Ascent Rate(asc)
  • altitude above sea levelaltunits(alt)
  • Dry-Bulb Temperature(tdry)
  • east longitude for all the input platforms.(lon)
  • Wind Status(wstat)
  • Wind Direction(deg)
  • Surface dew point temperature(dp)
  • Time offset of tweaks from base_time(time_offset)
  • Time offset from base_time(base_time)
sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrpnC1.a1:
  • east longitude for all the input platforms.(lon)
  • model meridional wind velocity(v_wind)
  • Ascent Rate(asc)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Status(wstat)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • altitude above sea levelaltunits(alt)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • surface wind speed(wspd)
  • north latitude for all the input platforms.(lat)

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DQRID : D980917.1
Start DateStart TimeEnd DateEnd Time
05/09/1998202905/09/19982029
Subject:
Incorrect surface readings
DataStreams:sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:
It appears that the operator entered an incorrect set of surface data for
the subject sounding.  The sounding has surface PTU as 975.6 hPa, 20.0 degC,
and 93% RH - the corresponding THWAPS readings are 969.7 hPa, 19.9 degC, and
72.1 %RH.  The OMIS log for the subject souding shows sonde surface values
of 969.2 hPa, 17.6 degC, and 70% RH.
Measurements:sgpsondewrpnC1.a0:
  • pressure at constant pressure surface(pres)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • north latitude for all the input platforms.(lat)
  • surface wind speed(wspd)
  • Ascent Rate(asc)
  • altitude above sea levelaltunits(alt)
  • Dry-Bulb Temperature(tdry)
  • east longitude for all the input platforms.(lon)
  • Wind Status(wstat)
  • Wind Direction(deg)
  • Surface dew point temperature(dp)
  • Time offset of tweaks from base_time(time_offset)
  • Time offset from base_time(base_time)
sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrpnC1.a1:
  • east longitude for all the input platforms.(lon)
  • model meridional wind velocity(v_wind)
  • Ascent Rate(asc)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Status(wstat)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • altitude above sea levelaltunits(alt)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • surface wind speed(wspd)
  • north latitude for all the input platforms.(lat)

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DQRID : D980917.2
Start DateStart TimeEnd DateEnd Time
05/07/1998232905/07/19982329
Subject:
Incorrect surface RH
DataStreams:sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:
Because of what appears to be a typographical error, the operator entered
5% RH when the surface RH was 54% RH.  The corresponding THWAPS reading
is 50.1% RH and the OMIS log shows 54%RH.
Measurements:sgpsondewrpnC1.a0:
  • pressure at constant pressure surface(pres)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • north latitude for all the input platforms.(lat)
  • surface wind speed(wspd)
  • Ascent Rate(asc)
  • altitude above sea levelaltunits(alt)
  • Dry-Bulb Temperature(tdry)
  • east longitude for all the input platforms.(lon)
  • Wind Status(wstat)
  • Wind Direction(deg)
  • Surface dew point temperature(dp)
  • Time offset of tweaks from base_time(time_offset)
  • Time offset from base_time(base_time)
sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrpnC1.a1:
  • east longitude for all the input platforms.(lon)
  • model meridional wind velocity(v_wind)
  • Ascent Rate(asc)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Status(wstat)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • altitude above sea levelaltunits(alt)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • surface wind speed(wspd)
  • north latitude for all the input platforms.(lat)

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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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DQRID : D990210.1
Start DateStart TimeEnd DateEnd Time
02/09/1999083402/09/19991016
Subject:
SGP/SONDE - Wrong cal tape
DataStreams:sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewndcalcC1.c1
Description:
There is something wrong with this sounding, its not clear exactly
what happened, however.  The first values reported by the radiosonde
are much different from those entered by the operator.  My impression
is that this is a calibration tape mixup.  The raw data file shows
that the sounding software was initialized twice for this sounding,
the first time showing sonde 823360910, the second time showing
sonde 819351814.  There is no enties in the operations log that
describe a problem with a sonde before launch.
Measurements:sgpsondewrpnC1.a0:
  • pressure at constant pressure surface(pres)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • north latitude for all the input platforms.(lat)
  • surface wind speed(wspd)
  • Ascent Rate(asc)
  • altitude above sea levelaltunits(alt)
  • Dry-Bulb Temperature(tdry)
  • east longitude for all the input platforms.(lon)
  • Wind Status(wstat)
  • Wind Direction(deg)
  • Surface dew point temperature(dp)
  • Time offset of tweaks from base_time(time_offset)
  • Time offset from base_time(base_time)
sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewndcalcC1.c1:
  • north latitude for all the input platforms.(lat)
  • Flags for input v_wind values(v_wind_flags)
  • Flags for input u_wind values(u_wind_flags)
  • W-to-E Component of wind, calculated(u_wind_calc)
  • Time offset from base_time(base_time)
  • S-to-N Component of Wind, calculated(v_wind_calc)
  • pressure at constant pressure surface(pres)
  • east longitude for all the input platforms.(lon)
  • Time offset of tweaks from base_time(time_offset)
  • altitude above sea levelaltunits(alt)
sgpsondewrpnC1.a1:
  • east longitude for all the input platforms.(lon)
  • model meridional wind velocity(v_wind)
  • Ascent Rate(asc)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Status(wstat)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • altitude above sea levelaltunits(alt)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • model zonal wind velocity(u_wind)
  • Dry-Bulb Temperature(tdry)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • surface wind speed(wspd)
  • north latitude for all the input platforms.(lat)

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DQRID : D990303.1
Start DateStart TimeEnd DateEnd Time
03/02/1999082803/02/19990828
Subject:
SGP/SONDE - Pressure jump at launch
DataStreams:sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:
The difference between the sonde-reported pressure at the surface
(969.1 hPa) and the first pressure value reported after launch
(963.5) is larger than expected.  This may indicate that either
the pressure sensor was jarred at launch, that the system failed
to correctly identify the launch start time, or some other problem.

The ascent rates during the first 30 seconds of the sounding will be
incorrect as will the absolute altitudes during the sounding.
Measurements:sgpsondewrpnC1.a0:
  • pressure at constant pressure surface(pres)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • north latitude for all the input platforms.(lat)
  • surface wind speed(wspd)
  • Ascent Rate(asc)
  • altitude above sea levelaltunits(alt)
  • Dry-Bulb Temperature(tdry)
  • east longitude for all the input platforms.(lon)
  • Wind Status(wstat)
  • Wind Direction(deg)
  • Surface dew point temperature(dp)
  • Time offset of tweaks from base_time(time_offset)
  • Time offset from base_time(base_time)
sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrpnC1.a1:
  • east longitude for all the input platforms.(lon)
  • model meridional wind velocity(v_wind)
  • Ascent Rate(asc)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Status(wstat)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • altitude above sea levelaltunits(alt)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • surface wind speed(wspd)
  • north latitude for all the input platforms.(lat)

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DQRID : D990329.1
Start DateStart TimeEnd DateEnd Time
03/22/1999023003/22/19990230
Subject:
Incorrect surface RH
DataStreams:sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:
The operator entered an incorrect value (7.5%) for the surface RH for this
sounding.  The correct value should have been 70%.  The operator noticed
the error after the sounding had been completed and reported it in his log.
Measurements:sgpsondewrpnC1.a0:
  • pressure at constant pressure surface(pres)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • north latitude for all the input platforms.(lat)
  • surface wind speed(wspd)
  • Ascent Rate(asc)
  • altitude above sea levelaltunits(alt)
  • Dry-Bulb Temperature(tdry)
  • east longitude for all the input platforms.(lon)
  • Wind Status(wstat)
  • Wind Direction(deg)
  • Surface dew point temperature(dp)
  • Time offset of tweaks from base_time(time_offset)
  • Time offset from base_time(base_time)
sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrpnC1.a1:
  • east longitude for all the input platforms.(lon)
  • model meridional wind velocity(v_wind)
  • Ascent Rate(asc)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Status(wstat)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • altitude above sea levelaltunits(alt)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • surface wind speed(wspd)
  • north latitude for all the input platforms.(lat)

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DQRID : D990513.1
Start DateStart TimeEnd DateEnd Time
05/10/1999113005/11/19992041
Subject:
SGP/SONDE - RH probably biased low in several soundings
DataStreams:sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:
In the process of moving storage facilties, site operations uncovered some old radiosondes 
(vintage April 1998) that were used in several soundings starting on May 10 at 0530 and 
continuing at least through May 11 at 2040.
Because these sondes are so old and pre-date Vaisala's repackaging they are likely subject 
to the sensor contamination problem that results in a dry bias in RH.  The sondes in 
question have serial numbers 816XXXXXX.
Measurements:sgpsondewrpnC1.a0:
  • pressure at constant pressure surface(pres)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • north latitude for all the input platforms.(lat)
  • surface wind speed(wspd)
  • Ascent Rate(asc)
  • altitude above sea levelaltunits(alt)
  • Dry-Bulb Temperature(tdry)
  • east longitude for all the input platforms.(lon)
  • Wind Status(wstat)
  • Wind Direction(deg)
  • Surface dew point temperature(dp)
  • Time offset of tweaks from base_time(time_offset)
  • Time offset from base_time(base_time)
sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrpnC1.a1:
  • east longitude for all the input platforms.(lon)
  • model meridional wind velocity(v_wind)
  • Ascent Rate(asc)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Status(wstat)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • altitude above sea levelaltunits(alt)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • surface wind speed(wspd)
  • north latitude for all the input platforms.(lat)

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DQRID : D991221.1
Start DateStart TimeEnd DateEnd Time
12/18/1999053012/18/19990530
Subject:
SGP/SONDE - Incorrect surface temperature
DataStreams:sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:
The operator entered 20.0 degrees rather than the true temperature of 2.0
degrees.
Measurements:sgpsondewrpnC1.a0:
  • pressure at constant pressure surface(pres)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • north latitude for all the input platforms.(lat)
  • surface wind speed(wspd)
  • Ascent Rate(asc)
  • altitude above sea levelaltunits(alt)
  • Dry-Bulb Temperature(tdry)
  • east longitude for all the input platforms.(lon)
  • Wind Status(wstat)
  • Wind Direction(deg)
  • Surface dew point temperature(dp)
  • Time offset of tweaks from base_time(time_offset)
  • Time offset from base_time(base_time)
sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrpnC1.a1:
  • east longitude for all the input platforms.(lon)
  • model meridional wind velocity(v_wind)
  • Ascent Rate(asc)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Status(wstat)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • altitude above sea levelaltunits(alt)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • surface wind speed(wspd)
  • north latitude for all the input platforms.(lat)

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DQRID : D991228.1
Start DateStart TimeEnd DateEnd Time
12/22/1999233012/22/19992330
Subject:
SGP/SONDE - Incorrect surface temperature
DataStreams:sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1
Description:
The operator entered the surface temperature as 25 degC rather than the
correct 2.5 deg C.  This is the second time in a week this type of error
has occurred.  I have sent a separate e-mail to site ops.
Measurements:sgpsondewrpnC1.a0:
  • pressure at constant pressure surface(pres)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • north latitude for all the input platforms.(lat)
  • surface wind speed(wspd)
  • Ascent Rate(asc)
  • altitude above sea levelaltunits(alt)
  • Dry-Bulb Temperature(tdry)
  • east longitude for all the input platforms.(lon)
  • Wind Status(wstat)
  • Wind Direction(deg)
  • Surface dew point temperature(dp)
  • Time offset of tweaks from base_time(time_offset)
  • Time offset from base_time(base_time)
sgpsondewrpnC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsondewrpnC1.a1:
  • east longitude for all the input platforms.(lon)
  • model meridional wind velocity(v_wind)
  • Ascent Rate(asc)
  • Time offset of tweaks from base_time(time_offset)
  • Wind Status(wstat)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • altitude above sea levelaltunits(alt)
  • Wind Direction(deg)
  • pressure at constant pressure surface(pres)
  • Dry-Bulb Temperature(tdry)
  • model zonal wind velocity(u_wind)
  • Time offset from base_time(base_time)
  • Surface dew point temperature(dp)
  • surface wind speed(wspd)
  • north latitude for all the input platforms.(lat)

Back To Table of Contents


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