@SUN-Ravenclaw. Unfortunately, you cannot. The problem is underconstraint. I mentionned it quickly here : https://ieeexplore.ieee.org/document/9138726
Because SNAP offset tracking module works with GRD images, it assumes pure horizontal displacements. Over iceflow, this is not far from the truth, but you have to be careful if you want to determine vertical displacement using the offset tracking of SNAP. It exists some way to “trick” SNAP into computing PO on SLC images (and so getting true LOS displacements), but it is a bit technical …