Suppose I have a 3D (X/Y/T) grid data, which in X direction and Time interval are equally spaced, but in Y direction (Gauss) is not. What I need is to change the data in regular grid. I think of using Regridding, but I failed. I'm always told error message. Then I want to use "objective_analysis", but I don't know how I should do if the data include missing value (or data on land). Is there anyone know how to do that? Thank you inadvance.