Reprocess: Incorrect surface wind speed units

DQR No:                               Platform: sgpsondeB6

Subject: Incorrect surface wind speed units (3/17/97-3/24/97)

Date Submitted:  3/31/97
Submitted By:                         _X_  Instrument Mentor
                                      ___  EST Member
                                      ___  Science Team Member
                                      ___  Other - Site Ops
 
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.

Platform/Measurement: sgpsondewrpnB6 - all
    What level data: (raw,a0,a1,b1,c1 etc):

    What location was the data collected at:  B6 (Purcell BF)
 
    Period of time in question
        Begin Date  03/17/97   Time 17:30      (GMT)
        End Date    03/24/97   Time 17:30      (GMT)

 Data should be labeled:
 ___  questionable                      ___  All data fields affected
 _X_  incorrect                         _X_  Only some data fields affected
 ___  wrong calibration
 ___  others 
 
 Discussion of Problem:

The BF operator noticed that the weather measure set used to provide the
surface values for the soundings was incorrectly set to output wind speed
in knots rather than m/s from 3/17 to (and including) 3/24.  As a result, 
the value of the surface wind speed in the subject soundings is approximately
twice the correct value (conversion of knots to meters/sec).  

Because the surface wind speed is not used in any subsequent calculation
by the system, this should be a very low impact problem.  

Other observations/measurements impacted by this problem:

None

Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)

Flag data.

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

Reprocess: Jump in pressure value

DQR No:                               Platform:  sgpsondeB6

Subject:        Jump in pressure value B6 sounding 970404.1733

Date Submitted: 4/9/97
Submitted By:   Barry Lesht           _X_  Instrument Mentor
                                      ___  EST Member
                                      ___  Science Team Member
                                      ___  Other _____________________________
 
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.

Platform/Measurement: sgpsondewrpnb6/ (alt, asc, press)
    What level data: (raw,a0,a1,b1,c1 etc): all

    What location was the data collected at: SGP/BF6
 
    Period of time in question
        Begin Date  4/04/97    Time   17:33    (GMT)
        End Date               Time            (GMT)

 Data should be labeled:
 ___  questionable                      _X_  All data fields affected
 _X_  incorrect                         ___  Only some data fields affected
 ___  wrong calibration
 ___  others 
 
 Discussion of Problem:

The first pressure value reported by the radiosonde (t = 2 sec) is
879.2.  The surface pressure value was 962.1 hPa.  Either the pressure
sensor was jarred during launch or the system mis-identified the actual
launch start time.  Further clarification requires analysis of the raw
data which will take some time.  The altitude values for this sounding
will be incorrect.  The ascent rate values during the first 30 seconds
also will be wrong.  Because the system will reject samples with out
of bound ascent rates (i.e., during the first 30 seconds), the temperature
and rh values also will be incorrect (result of interpolation).  Relative
height values after 30 seconds should be okay.

 
Other observations/measurements impacted by this problem:


Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)

Flag data.

Data Processing Notes                Date

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

Jump in pressure value

DQR No:                               Platform:  sgpsondeB6

Subject:        Jump in pressure value B6 sounding 970418.1731

Date Submitted: 4/22/97
Submitted By:   Barry Lesht           _X_  Instrument Mentor
                                      ___  EST Member
                                      ___  Science Team Member
                                      ___  Other _____________________________
 
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.

Platform/Measurement: sgpsondewrpnb6/ (alt, asc, press)
    What level data: (raw,a0,a1,b1,c1 etc): all

    What location was the data collected at: SGP/BF6
 
    Period of time in question
        Begin Date  4/18/97    Time   17:31    (GMT)
        End Date               Time            (GMT)

 Data should be labeled:
 ___  questionable                      _X_  All data fields affected
 _X_  incorrect                         ___  Only some data fields affected
 ___  wrong calibration
 ___  others 
 
 Discussion of Problem:

The first pressure value reported by the radiosonde (t = 2 sec) is
913.4.  The surface pressure value was 973.9 hPa.  This difference
is substantially greater than the expected (normal) change and may mean that
either the pressure sensor was jarred during launch or the system 
mis-identified the actual launch start time.  Further clarification requires 
analysis of the raw data which will take some time.  The altitude values 
for this sounding will be incorrect.  The ascent rate values during the 
first 30 seconds also will be wrong.  Because the system will reject 
samples with out of bound ascent rates (i.e., during the first 30 seconds), 
the temperature and rh values also will be incorrect (result of 
interpolation).  Relative height values after 30 seconds should be okay.

 
Other observations/measurements impacted by this problem:


Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)

Flag data.

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

Jump in pressure value

DQR No:                               Platform:  sgpsondeB6

Subject:        Jump in pressure value B6 sounding 970412.0832

Date Submitted: 4/30/97
Submitted By:   Barry Lesht           _X_  Instrument Mentor
                                      ___  EST Member
                                      ___  Science Team Member
                                      ___  Other _____________________________
 
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.

Platform/Measurement: sgpsondewrpnb6/ (alt, asc, press)
    What level data: (raw,a0,a1,b1,c1 etc): all

    What location was the data collected at: SGP/BF6
 
    Period of time in question
        Begin Date  4/12/97    Time   08:32    (GMT)
        End Date               Time            (GMT)

 Data should be labeled:
 ___  questionable                      _X_  All data fields affected
 _X_  incorrect                         ___  Only some data fields affected
 ___  wrong calibration
 ___  others 
 
 Discussion of Problem:

This is a sounding that was just reprocessed because the original data
was not sent to the SDS due to a communication problem.

The first pressure value reported by the radiosonde (t = 2 sec) is
904.3.  The surface pressure value was 978.9 hPa.  This difference
is substantially greater than the expected (normal) change and may mean that
either the pressure sensor was jarred during launch or the system 
mis-identified the actual launch start time.  Further clarification requires 
analysis of the raw data which will take some time.  The altitude values 
for this sounding will be incorrect.  The ascent rate values during the 
first 30 seconds also will be wrong.  Because the system will reject 
samples with out of bound ascent rates (i.e., during the first 30 seconds), 
the temperature and rh values also will be incorrect (result of 
interpolation).  Relative height values after 30 seconds should be okay.

 
Other observations/measurements impacted by this problem:


Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)

Flag data.

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

Jump in pressure value B6 sounding

DQR No:                               Platform:  sgpsondeB6

Subject:        Jump in pressure value B6 sounding 970619:0530

Date Submitted: 6/24/97
Submitted By:   Barry Lesht           _X_  Instrument Mentor
                                      ___  EST Member
                                      ___  Science Team Member
                                      ___  Other _____________________________
 
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.

Platform/Measurement: sgpsondewrpnb6/ (alt, asc, press)
    What level data: (raw,a0,a1,b1,c1 etc): all

    What location was the data collected at: SGP/BF6
 
    Period of time in question
        Begin Date  6/19/97    Time   05:30    (GMT)
        End Date               Time            (GMT)

 Data should be labeled:
 _X_  questionable                      ___  All data fields affected
 ___  incorrect                         _X_  Only some data fields affected
 ___  wrong calibration
 ___  others 
 
 Discussion of Problem:

The first pressure value reported by the radiosonde (t = 2 sec) is
970.4.  The surface pressure value was 975.1 hPa.  This difference
is greater than the expected (normal) change and may mean that
either the pressure sensor was jarred during launch or the system 
mis-identified the actual launch start time.  Further clarification requires 
analysis of the raw data which will take some time.  The altitude values 
for this sounding may be incorrect.  The ascent rate values during the 
first 30 seconds also will be wrong.  Because the system will reject 
samples with out of bound ascent rates (i.e., during the first 30 seconds), 
the temperature and rh values also will be incorrect (result of 
interpolation).  Relative height values after 30 seconds should be okay.

 
Other observations/measurements impacted by this problem:


Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)

Flag data.

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

Jump in pressure value B6

DQR No:                               Platform:  sgpsondeB6

Subject:        Jump in pressure value B6 sounding 970619:1130

Date Submitted: 6/24/97
Submitted By:   Barry Lesht           _X_  Instrument Mentor
                                      ___  EST Member
                                      ___  Science Team Member
                                      ___  Other _____________________________
 
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.

Platform/Measurement: sgpsondewrpnb6/ (alt, asc, press)
    What level data: (raw,a0,a1,b1,c1 etc): all

    What location was the data collected at: SGP/BF6
 
    Period of time in question
        Begin Date  6/19/97    Time   11:30    (GMT)
        End Date               Time            (GMT)

 Data should be labeled:
 _X_  questionable                      ___  All data fields affected
 ___  incorrect                         _X_  Only some data fields affected
 ___  wrong calibration
 ___  others 
 
 Discussion of Problem:

The first pressure value reported by the radiosonde (t = 2 sec) is
968.0.  The surface pressure value was 974.5 hPa.  This difference
is greater than the expected (normal) change and may mean that
either the pressure sensor was jarred during launch or the system 
mis-identified the actual launch start time.  Further clarification requires 
analysis of the raw data which will take some time.  The altitude values 
for this sounding may be incorrect.  The ascent rate values during the 
first 30 seconds also will be wrong.  Because the system will reject 
samples with out of bound ascent rates (i.e., during the first 30 seconds), 
the temperature and rh values also will be incorrect (result of 
interpolation).  Relative height values after 30 seconds should be okay.

 
Other observations/measurements impacted by this problem:


Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)

Flag data.

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

Last sample incorrect b6 sounding 970712:1130

It appears that a communications glitch resulted in the last sample line
of the raw data provided by the instrument being corrupted.  As a result,
the ingest translated the corrupted data as real information.  The last
valid sample is the one collected at 104 min 48 seconds into the sounding.

Because this was the last sample in the file, I do not recommend that
we reprocess these data.

• altitude above sea levelaltunits(alt)
• Ascent Rate(asc)
• north latitude for all the input platforms.(lat)
• Time offset of tweaks from base_time(time_offset)
• Wind Status(wstat)
• Relative humidity scaled, by total column amount from MWR(rh)
• Surface dew point temperature(dp)
• pressure at constant pressure surface(pres)
• Dry-Bulb Temperature(tdry)
• Time offset from base_time(base_time)
• surface wind speed(wspd)
• east longitude for all the input platforms.(lon)
• Wind Direction(deg)

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

qc flags set incorrectly at 11:52:44

This should be an 'inverse' data quality report.  Because of the problem
with the ingest of this file caused by the communication glitch (see
earlier DQR and PIF submitted today) the qc_delta flags for variabels
tdry and asc were set incorrectly.  All data for this sounding from
11:30 to one sample from the end are correct and the only qc flags that
should be set are at the first and last samples of the file.

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

Missing/Questionable data 970715:0530 sounding

DATA QUALITY REPORT(DQR)

                              DQR No: D970718.1

o  Date Submitted: Fri Jul 18 16:29:46 GMT 1997


o  Submitted By:   Barry Lesht
        Organization:   ANL
           Telephone:   (630) 252-4208
               Email:   bmlesht@anl.gov

o  Subject of DQR: sgpsondewrpnB6.9707150604.9707150705.all - Missing/Questionable data 
970715:0530 sounding

o  Data should be labeled: questionable, missing

o  Description: 
   This file has two problems.  The first is possible interference and
incorrect data from 34:32 into the flight (06:04:32 or 9673 m) to
38:48 (06:08:48 or 10718 m).  I would treat these data a questionable.
There is a gap in the data, possibly due to SDS communication problems
from 38:48 to 95:42 (07:05:42 or 25112 m) in which all data are missing.

o  Suggested Corrections: 
   Reprocess file from raw data (companion PIF will be submitted).
   Flag data.

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

Pressure jump after launch

First pressure value returned by the sonde after launch was 966.8, somewhat
lower than would be expected given the surface pressure reading of 971.3.
This resulted in an apparent ascent rate that is greater than the QC flag
trigger.  Ascent rates during the first 30 s of flight are likely incorrect.
Absolute altitudes also are likely incorrect.  Relative pressure differences
after launch should be okay.

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

Pressure jump at launch

The first pressure value reported by the sonde after launch (966.1) is
lower than the surface pressure value (972.1) by a greater difference than
normally would be expected.  This may indicate that the sonde was jarred
on launch, that the system mis-identified actual launch time, or that the
operator entered and incorrect value (typo or read too early).  The
altitude values for this sounding will be wrong as will the ascent rates
during the first 30 seconds.  If the ascent rates were such that the
sample acceptance criteria  were violated, the pressure, temperature,
and RH values in the first part of the profile may be the result of
interpolation.

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

Pressure jump at launch

The difference between the first pressure value reported by the sonde (958.8)
and the surface pressure (969.3) is considerable greater than would be
expected.  The altitude values for this sounding will be incorrect, as will
be the ascent rate values during the first 30 seconds.  Values of P, T, and
RH during the first 30 seconds will most likely be values interpolated betwen
the surface and the 30 second sample.

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

Pressure jump at launch

The difference between the first pressure value reported by the radiosonde
aloft (957.9) and the surface value entered by the operator (962.6) is
greater than would be expected normally.  This may indicate that the sonde
was jarred at launch or that the system mis-identified the launch start
time.  The altitude values for this sounding will be incorrect as will be
the ascent rates in the first 30 seconds.  If the reported ascent rates
exceed 12 m/s, the thermodynamic data will be interpolated rather than
sampled.

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

Pressure jump at launch

The difference between the first pressure value reported by the sonde after
launch (968.5) and the surface value entered by the opertor (973.5) is
greater than would normally be expected.  This may indicate that either the
sonde was jarred at launch or that the system mis-identified launch start
time.  The altitude values for this sounding will be in error and the
ascent rate values in the first 30 seconds also will be wrong.

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

Pressure jump after launch

The difference between the first pressure value reported by the sonde
after launch (968.5) and the surface value entered by the operator (973.8)
is greater than would normally be expected.

The altitude values for this sounding will be incorrect as will be the
ascent rates for the first 30 seconds.  Some of the thermodynamic data
at the beginning of the soundings (when ascent rates exceed 12 m/s) will
be the result of interpolation between the surface value and the first
value obtained when the ascent rate with in acceptable limits.

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

Pressure jump at launch

The difference between the first pressure value obtained from the sonde
after launch (971.1) and the value of surface pressure entered by the
operator (976.8) is larger than usual.  I note that soundings done at
0530 and 1130 have surface pressures of 973.2.  It may be a typographic
error by the operator, jarring of the sensor at launch, or mis-identification
of the start time by the system.  In any event, the absolute altitudes
for this sounding will be wrong, and the ascent rates during the first
30 seconds also will be too high.

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

Incorrect radiosonde serial numbers

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.

• 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)

• 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)

• 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)

• 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)

• 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)

• 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)

• 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)

• 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)

• 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)

• 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)

Pressure jump at launch

The difference between the first pressure value reported by the sonde after
launch (964.0) and the surface pressure (971.8) is greater than would
be expected.  The sonde may have been jarred at launch or the system may
not have identified the start time correctly.  The absolute altitude for
the sounding and ascent rates for the first 30 s will be incorrect.

• altitude above sea levelaltunits(alt)
• Ascent Rate(asc)
• north latitude for all the input platforms.(lat)
• Time offset of tweaks from base_time(time_offset)
• Wind Status(wstat)
• Relative humidity scaled, by total column amount from MWR(rh)
• Surface dew point temperature(dp)
• pressure at constant pressure surface(pres)
• Dry-Bulb Temperature(tdry)
• Time offset from base_time(base_time)
• surface wind speed(wspd)
• east longitude for all the input platforms.(lon)
• Wind Direction(deg)

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

Interference affects sounding

It appears that the ground station either locked on an incorrect signal
(probably from another radiosonde) or was incorrectly tuned to the sonde
being launched.  As a result, all of the data from this sounding look
strange.  The sounding is itself short (only 228 sec duration) again
indicating a telemetry problem.

• altitude above sea levelaltunits(alt)
• Ascent Rate(asc)
• north latitude for all the input platforms.(lat)
• Time offset of tweaks from base_time(time_offset)
• Wind Status(wstat)
• Relative humidity scaled, by total column amount from MWR(rh)
• Surface dew point temperature(dp)
• pressure at constant pressure surface(pres)
• Dry-Bulb Temperature(tdry)
• Time offset from base_time(base_time)
• surface wind speed(wspd)
• east longitude for all the input platforms.(lon)
• Wind Direction(deg)

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

Pressure jump at launch

The difference between the first pressure value reported by the sonde
after launch (968.0) and the surface pressure is greater than is expected.
The absolute altitude for this sounding and the ascent rate for the
first 30 seconds are questionable.

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• altitude above sea levelaltunits(alt)
• Ascent Rate(asc)
• north latitude for all the input platforms.(lat)
• Time offset of tweaks from base_time(time_offset)
• Wind Status(wstat)
• Relative humidity scaled, by total column amount from MWR(rh)
• Surface dew point temperature(dp)
• pressure at constant pressure surface(pres)
• Dry-Bulb Temperature(tdry)
• Time offset from base_time(base_time)
• surface wind speed(wspd)
• east longitude for all the input platforms.(lon)
• Wind Direction(deg)

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