need SSH data for the Indian Ocean

[ratheesh ramakrishnan]

i need SSH data of the indian ocean region for the project work on planetory propagation in indian ocean

[anand]

Dear,

you can download the SSH data from these two sites....
http://cwcaribbean.aoml.noaa.gov and http://www.cdc.noaa.gov/cdc/reanalysis/reanalysis.shtml
just have a look into these sites and then tell me if more required..
good luck
Anand

[vinu]

Hi Ratheesh,

You can also depend on Satellite observed
Sea Surface Height data sets. For example you may be
aware of TOPEX/POSEIDON mission for measuring seas surface
height and available since Dec-1992.

However the data is not directly available from the JPL (Jet Propulsion
Laboratory, who are in responsible for the mission
http://sealevel.jpl.nasa.gov/mission/mission.html).

You can access this data from http://www.csr.utexas.edu/sst/gsdata.html
where it is made available for public. ftp://ftp.csr.utexas.edu/pub/sst/topex

The raw-data is in a prescribed fromat, (you can read the 'readme' files
instructions). They time-cycles of the satellite orbitting is quoted in
the site. It is now available from 1993 to 2002 (nearly). It is 10 day
period data.

If you need the 'netcdf' format of this data, I can provide you
for your region of intereset,

If you need further information, dont hesitate to ask,

Good Luck.

[anand]

Hai,

Hope you have got enough links to the data, the links i provided will give you ASCII data and also the GIF images, and now vinu also provided you site from where you can access the data in other formats. if you want to retrive netcdf format and change into the other, we can help you. you can use ODV or Fortran program to do that. Please tell about it and then we can provide you with that
Good Luck
Anand

[yaswant]

i need SSH data of the indian ocean region for the project work on planetory propagation in indian ocean
Hello Ratheesh,

AVISO products (from ERS/TP/Jason-1/ENVISAT missions) are availabe at different spatial grids (1 degree and 1/3 degree). Have a look at http://www.aviso.oceanobs.com/ for details.

Anonymous ftp through ENACT: ftp://ftp.cls.fr/ (ftp://ftp.cls.fr/pub/oceano) (go to pub/oceano).

I also suggest you to connect at the Aviso website: http://www.jason.oceanobs.com (http://www.jason.oceanobs.com/) and particulary the page: http://www.jason.oceanobs.com/html/donnees/welcome_fr.html (http://www.jason.oceanobs.com/html/donnees/welcome_fr.html) where you will find all information concerning Aviso products.

cheers,
yaswant

[madhujoshi]

Hai.vinu...
I got ur mail about SSH.... refered to Ratheesh
Actully I am looking for SSH climatology.....over indian ocean ........
do u have any idea bout it
I have gone through ftp://ftp.csr.utexas.edu/pub/sst/topex
but how to open the corresponding file in to ASCII format....
so that i can average few years data to represent the climatological trends of SSH....
waiting for reply


Hi Ratheesh,

You can also depend on Satellite observed
Sea Surface Height data sets. For example you may be
aware of TOPEX/POSEIDON mission for measuring seas surface
height and available since Dec-1992.

However the data is not directly available from the JPL (Jet Propulsion
Laboratory, who are in responsible for the mission
http://sealevel.jpl.nasa.gov/mission/mission.html).

You can access this data from http://www.csr.utexas.edu/sst/gsdata.html
where it is made available for public. ftp://ftp.csr.utexas.edu/pub/sst/topex

The raw-data is in a prescribed fromat, (you can read the 'readme' files
instructions). They time-cycles of the satellite orbitting is quoted in
the site. It is now available from 1993 to 2002 (nearly). It is 10 day
period data.

If you need the 'netcdf' format of this data, I can provide you
for your region of intereset,

If you need further information, dont hesitate to ask,

Good Luck.

[rocksea]

I have gone through ftp://ftp.csr.utexas.edu/pub/sst/topex
but how to open the corresponding file in to ASCII format....
so that i can average few years data to represent the climatological trends of SSH....
waiting for reply
hi madhujoshi, i just quickly went through the ftp link listed and saw that teh files are zipped. So you just have to unzip the files. In linux there are many unzip facilities and in windows you can use winrar. You can unzip all the files together and get the resultant ascii data within the files.

[vinu]

Hi Madhujoshi,

I hope you have worked around the problem of opening the data
in ASCII format. As rocksea suggested, the files are in Zipped form.


In fact, the TOPEX satellite has ended its functioning by
early 2006 and the mission is taken over by the its follower
JASON and contunue operating now. I remember somebody
reported that news in our website as well.

The repeat cycle of TOPEX was nearly 10 day. Alternatively
a weekly repeat cycle data is compiled (7-day periodicity)
from SSHA observations of TOPEX, ERS and JASON and avaliable
from AVISO. Please browse throug the Notes and Links/Ocean Database
section to reach AVISO links. It is available in 1/3 x 1/3 degree resolution.

I am a bit confused with the sense of a "climatology SSHA".
If we are concerned with the mean state of the Ocean
a more relevent one may be "climatological dynamic height".
SSHA is the anomaly (undulations) from this mean dynamic height.
Thus a climatology out of this SSHA should be viewed carefuly.

While, a "composite SSHA" of particual event has a different
meaning. For example, all ElNino year comoposite (average
of all ElNino events) of SSHA will show the structure of ElNino.

Discussions are welcome


-Thanks

[rocksea]

hi vinu, he was talking about climatological SSH and not SSHA
where SSH = climatological (or mean) Sea Surface Height + SSHA