Geometric correction of the data crossing the meridian (anti-meridian)

Hi all,

I’m trying to process geometric correction of S1 EW GRD data using snap. I’m having a hard time doing this because 1) the scene crosses the anti-meridian (180 deg) and 2) no external DEM is available at all (in the Arctic Ocean). The second problem can be solved by using ‘Geometric Correction’ -> ‘Ellipsoid Correction’ in order to process without a dem.

It seems like I have to make two subsets with respect to the anti-meridian, but I’m not sure if this can be done nicely in snap because snap only supports subsetting in rectangles. In this case, multiple subsets must be created in order to cover the whole scene due to the inclination.

Does anybody know how to solve this problem? or how to work around this problem?