Soundings in GrADS

[Dan Swank]

Marco Stoll,

NCDC NOMADS has recently put the NCDC Integrated Global Radiosounde
Archive - Upper Air dataset on our Grads Data Server.

The Observations are grouped by station and the stations grouped by
country, to make naviagion easier, see the page:
http://nomads.ncdc.noaa.gov/tmp/IgraCountries.html
This contains GDS links todirectory listings of each station in the
respective country.

The GDS can be used to get text data using this sample given by Jennifer
Adams,
This should be what you are looking for:

This is the first release of this dataset, if you encounter any problems
with it let me know.

======================================

If you run GrADS locally,  open that data set, set the dimension
environment, and make a display request, e.g.
set x 1
set y 1
set t last
set z 1000 100
d t(stid=72520)

then GrADS will display the sounding and give you this message:
gadods: requesting
http://nomads.ncdc.noaa.gov:9091/dods/IGRA_STATION_RAOBS/425/
igra.72520.dods?
stid,lon,lat,time,lev,t&bounds(1,1,1,1,1000,100,00Z01JAN2004,00Z01JAN200
4)&stid("72520")

Which shows you how to set up the constraints for station data
requests. To get ascii data, simply swap "dods?" with "ascii?" and type
that URL into your browser. Then you get this:

http://nomads.ncdc.noaa.gov:9091/dods/IGRA_STATION_RAOBS/425/igra.72520.ascii?stid,lon,lat,time,lev,t&bounds(1,1,1,1,1000,100,00Z01JAN2004,00Z01JAN2004)&stid("72520")

stid, lon, lat, time, lev, t
"72520\000\000\000", -80.23, 40.53, 37988.0, 925.0, 0.2
"72520\000\000\000", -80.23, 40.53, 37988.0, 850.0, -6.3
"72520\000\000\000", -80.23, 40.53, 37988.0, 700.0, -15.1
"72520\000\000\000", -80.23, 40.53, 37988.0, 500.0, -28.8
"72520\000\000\000", -80.23, 40.53, 37988.0, 400.0, -39.2
"72520\000\000\000", -80.23, 40.53, 37988.0, 321.5, -49.7
"72520\000\000\000", -80.23, 40.53, 37988.0, 300.0, -50.2
"72520\000\000\000", -80.23, 40.53, 37988.0, 250.0, -49.9
"72520\000\000\000", -80.23, 40.53, 37988.0, 200.0, -49.9
"72520\000\000\000", -80.23, 40.53, 37988.0, 150.0, -54.5
"72520\000\000\000", -80.23, 40.53, 37988.0, 100.0, -56.7

You can get the same information inside GrADS with the 'set gxout
print' option.

======================================

-Dan




Marco Stoll wrote:

>Dear GrADS users,
>
>i have to compare model profiles with soundings.
>
>Is there an online source (archive) with upper air soundings
>in a GrADS-readable format ?
>
>If not, what is the easiest way to get the (text format) sounding data
>(easily available e.g. at University of Wyoming) into GrADS?
>
>Thanks to all contributions
>
>Marco
>
>
>
>------------------------------------------------------
>This mail was sent through IMP at http://mail.unibe.ch
>
>

--
Dan Swank <dan.swank at noaa.gov>
NOMADS programmer
Contractor - STG, Incorporated
151 Patton Avenue, Room 514
Asheville, NC 28801
Phone: 828-271-4007