Check out the EarthScope Short Courses on InSAR with ISCE2. There is a lecture on pixel offset tracking.
It would not be appropriate to put an ISCE tutorial here on the ESA STEP forum.
May I ask if it is possible to try using offset tracking in some environments or situations where the displacement is less than 1m?
@CSvincent0426 Check the tutorial above.
@EJFielding Is the tutorial available as text or it is just the video from the last ISCE course.
Thank you for your answer. I would also like to ask you another question, since the line of sight is pointing towards the ground, does the positive value indicate settlement in the range_shift result?
@CSvincent0426 LoS of S-1 is pointing right of the satellite track and is not at nadir. The positive values i.e. increase of the number of phases correspond to movement away from the satellite.
Thank you very much for your answer to me. I use GRD image, which only has intensity information. Does this image also follow the principle you said above?
Yes. The image is always acquired in slant range.
Thank you sir.That is to say, if two GRD images are matched and POT is used, and the result of range_shift shows a positive value, it indicates that the pixel changes are moving away from the satellite, right？
@CSvincent0426 No, the POT method is different from DInSAR. Please google about the difference.