CDO

Hi,

I am trying to interpolate a 1º grid into a coarser and regular grid 2.5º. The problem I have is that the original file only contains only 39 lat and 48 lon.
What I did so far (I don't know if it makes sense, but I had always used the cdo for interpolating global datasets, not one particular region):

cdo sellonlatbox,347,34,70,35 -remapbil,r144x73 file.nc newgrid.nc

This is the info of the newgrid.nc file:

File format: netCDF
    -1 : Institut Source   Param       Time Typ  Grid Size Num  Levels Num
     1 : unknown  unknown  -1          var  F64       285   1       1   1
   Horizontal grids :
     1 : lonlat       > size      : dim = 285  nlon = 19  nlat = 15
                        lon       : first = -12.5  last = 32.5  inc = 2.5  degrees_east
                        lat       : first = 35  last = 70  inc = 2.5  degrees_north
   Vertical grids :
     1 : surface                  : 0
   Time axis :  3653 steps
     RefTime =  2000-01-01 00:00:00  Units = days  Calendar = STANDARD
  YYYY-MM-DD hh:mm:ss  YYYY-MM-DD hh:mm:ss  YYYY-MM-DD hh:mm:ss  YYYY-MM-DD hh:mm:ss
  2000-01-01 00:00:00  2000-01-02 00:00:00  2000-01-03 00:00:00  2000-01-04 00:00:00

When I try to look into the data the file contains NA in all grids, so it is not working...
what could be the proper way to get the interpolation? Any suggestion?

Many thanks!

cheers,

Noelia