SNAP API based Codes

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DEM generation In General

Is there any generic way to work with SAR data to generate EDM ? Does SNAP help in doing that ? I have been following https://media.asf.alaska.edu/uploads/pdf/current_data_recipe_pdfs/create_a_dem_from_sentinel_1_v1.3.pdf , but all this is specific to Sentinel 1 data ? How to go about it in general ? Any opensource project? or software? I know the steps followed for sentinel-1 specifically , so I expect similar processing on the generic data, but with what ? Thanks in advance for the help.