[ferret_users] lambert GRIB to netcdf?

[Peter Szabo <szabpet83@xxxxxxxxx>]

Dear Ferret_Users,

i have monthly-stored (one value for every 6 hours in a month), GRIB-formatted, Lambert conformal-projected database. i want this to be in netcdf format (an average or summed value per month is enough).

I know, ferret cannot read GRIB files, so i tried to use CDO. These operators read GRIB files, but cannot operate with Lambert projection. (though it is said on their homepage: http://www.mpimet.mpg.de/fileadmin/software/cdo/ )

Then i tried to walk this way: i made the CDO to write out the values in ASCII format (1. file for 124 timesteps), then i got the coordinates in an other ASCII file (2. file) then i 'cat'-ed the coordinate file to be there in 2. file (now 124 timesteps), after that i pasted the 1. and 2. file (i got lon lat value for 124 timesteps).
i got results like this:

   12.4353   44.6348       280.8
   12.5611   44.6417       281.1
   12.6870   44.6485       281.1
   12.8129   44.6551       281.1
   12.9389   44.6616       281.1
   13.0648   44.6680       281.2
   13.1908   44.6742       281.2
   13.3169   44.6803       281.2
   13.4429   44.6862       281.1
   13.5690   44.6919       281.1
   13.6951   44.6976       281.3
   13.8212   44.7030       281.1
   13.9474   44.7084       280.9
   14.0736   44.7136       281.3
   14.1998   44.7186       281.1
   14.3260   44.7235       279.7
   14.4523   44.7282       278.4
   14.5785   44.7328       279.8
   14.7048   44.7373         280

Then i made script like this:

DEFINE AXIS/x=12.44:25.22/np=97 long
DEFINE AXIS/y=44.64:50.01/np=61 lati
DEFINE AXIS/t=1:124:1 time
DEFINE GRID/t=time/x=long/y=lati grids
SET DATA/EZ/VARIABLES="lon,lat,tmp"/GRID=grids "myfile.txt"

If I save out the variable tmp will it be on a normal lat/lon grid (will it be correct when using 'go land_detail'?) and can i compare it with lat/lon data sets?

i know, for only one timestep it would be such an easy case, i could use 'scat2gridlaplace' and 'SET DATA/EZ/VARIABLES="lon,lat,tmp" "myfile.txt"' without setting the grid but with defining the x-y axis!

Should i start thinking of an other solution in order to be able use Lambert (and) GRIB file? Can someone help me? Thanks in advance,

Peter Szabo, HMS