Hi Robert,
You would need to use the regridding functions to regrid, say, one
of the fields to a rectilinear grid and from there to the other
curvilinear grid; or regrid both of them to the same rectilinear
grid and do your calculations there.
http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/appendix-a-external-functions/CURV-TO-RECT
http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/appendix-a-external-functions/CURV-TO-RECT-MAP
http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/appendix-a-external-functions/RECT-TO-CURV
We do have in the pipeline some development which will make handling
curvilinear grids more seamless, and some regridding functions which
are faster; but the fact remains that you'd need to get the data
onto the same grids before being able to take differences.
Ansley
On 3/21/2016 3:53 PM, Osinski, Robert
FORNATL, PL wrote:
Dear ferreters,
I need your help in
interpolating/regridding model outputs onto
satellite measurements. I have model results of ice
thickness distribution on:
sh dat
1> ./R1009RBRcaak01a.cice.h.2004-01.nc
(default)
name title
I J K L
TLON T grid center longitude 1:1280
1:720 ... ...
TLAT T grid center latitude 1:1280
1:720 ... ...
ULON U grid center longitude 1:1280
1:720 ... ...
ULAT U grid center latitude 1:1280
1:720 ... ...
TMASK ocean grid mask 1:1280
1:720 ... ...
HI grid cell mean ice thickness 1:1280
1:720 ... 1:1
and satellite measurements:
yes? sh dat
currently SET data sets:
1> ./kwok_icesat.nc (default)
name title
I J K L M N
CELL_AREA
area of grid cell on stereograp 1:140
1:140 ... ... ... ...
H_FM04 February-March 2004 sea ice thi 1:140
1:140 ... ... ... ...
LATITUDE latitude 1:140
1:140 ... ... ... ...
LONGITUDE
longitude 1:140
1:140 ... ... ... ...
MASK ocean-land mask 1:140
1:140 ... ... ... ...
I need to have interpolated model's output onto
measurements grid to have possibility to do some
calculations between them for instance to get
distribution of differences between them. Attached
are figures of modeled and measured ice.
Thanks in advance,
Robert Osinski
NPS,
Monterey, CA
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