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Hi Miguel, Yes, you can do both of these things in Ferret. The topics to look at in the documentation are "regridding, syntax and examples" and "sigma- coordinate data". Also read the documentation under "ZAXREPLACE function". I will point you to some more documentation and examples, but if you need assistance, please write back with more information about your input data and the output grid that you want to use. You will define the grid in X and Y which you want to interpolate your components to, and regrid in X and Y. Next you would do the sigma-regridding in a second step. To see how to do regridding in X and Y, run the demonstration script, regridding_demo yes? go regridding_demo For a bit more on the sigma-level regridding, see the FAQ, http://www.ferret.noaa.gov/Ferret/FAQ/data_management/sigma_coordinate_demo.html Ansley Miguel Angel wrote: Hi, I would appreciate your help to the following question: I have u and v velocity components that I need to interpolate horizontally and after from z-level to sigma-level. Is there some way to do with Ferret? Thanks in advance PhD. Student Miguel Angel Ahumada |