Phase removal for GSLC in SNAP GUI

snap
1

Hi all,

I’m currently trying to generate a flattened GSLC (Geocoded SLC) from a KOMPSAT-5 secondary SLC in SNAP GUI, removing both flat and topographic phase before interferogram formation.

Here are some limitations I ran into using SNAP GUI:

  1. I thought Band Maths could help, but I found out that Band Maths only works within a single product. I cannot combine bands from different products (e.g., master vs secondary) for phase removal. Are there any other ways to perform phase calculation across products?

  2. In the GUI, interferogram formation requires stacked SLCs, which makes secondary-only flattening tricky. I also tried a self-coregi trick (stacking the same secondary image twice), but it did not work. Is it really impossible to do interferogram formation without the coregistration step in SNAP GUI?

Notes:

  • DEM is Copernicus 30m, so it’s not a main concern.
  • I do not have orbit files for K5 images. Will this be problematic for creating a GSLC?

Any thoughts, tips, or suggestions are greatly appreciated.
Thank you.