Hello epapadak
The reason caused this phenomenon should be the baseline issue according this reply:
I test the ALOS-2 images for coseismic deformation caused at 2016/02/06 in Taiwan, result show that heighest “orbit interpolation degree” is work for ALOS-2 data, because of large perpendicular baseline I think, and get correct ground deformation.
Also, I try change “degree of flat earth polynomial” and “number of flat earth estimation points” for testing, while they don’t show any effect in my result.
For the last question, “orbit interpolation degree” should be same with the one defined in the “topographic phase removal”, because you use “that” orbit data to rebuild the topographic phase, so it should be use same “orbit interpolation degree” I think.
Cheers.