regridding of regular data onto irregular grid

[Arne Biastoch <abiastoch@xxxxxxxxxxxxxxx>]

Dear Ferreters,

maybe this is already a challenge beyond the scope of Ferret, but I will 
give it a try: Is Ferret able to interpolate gridded data onto an 
irregular grid?

An Example: My input data are regular sea surface heights on a 1/3x1/3 
Mercator grid:

 name     title                             I         J         K
 MSLA     TP/ERS-1 Sea Level Anomaly       1:1080    1:915     ...

which I would like to interpolate on a tripolar grid that is spanned by 
2D latitudes and longitudes:

 name     title                             I         J         K
 NAV_LON  Longitude                        1:182     1:149     ...
 NAV_LAT  Latitude                         1:182     1:149     ...

In the end, I would like to have a new variable msla_new with dimensions 
of 182x149.

As expected, a simple
shade MSLA[d=1,gx=nav_lon[d=2],gy=nav_lat[d=2]]
does not really work....

Any suggestions?

-Arne

--

Dr. Arne Biastoch

Institute for Marine Research         phone: ++49 431 600-4013
FB1 Ocean Circulation and Climate     fax  : ++49 431 600-1515
Duesternbrooker Weg 20                email: abiastoch@ifm.uni-kiel.de
24105 Kiel, Germany

http://www.ifm.uni-kiel.de/fb/fb1/tm/data/pers/abiastoch.html