Hello,
I’m using SNAP + PySTAMP (Python version of Stamps presented at the last ESA FRINGE conference) for monitoring displacement in and around a rock glacier where some corner reflector are also installed.
The area present very etherogeneous movement in the range of few 10 m. If I use the standard unwrapping parameter of STAMP like UNwrapping time window and Unwrapping space grid (730 and 200 respectively) I obtain very bad results (displacement timeseries present many sawtooth and seem to be always confined between -20 and + 20 mm). The only way I can obtain reliable results (smoother timeseries, velocity differentiation between areas, magnitude coherent with GNSS installed in the area) is to reduce the unwrap time window to 1 day, and the grid size to 10 to 30 m. As soon as I change a bit these parameters results are significantly different.
I was wondering if anyone ever encountered this problem while using STAMP for faster landslide or in periglacial environment / mountains, and if acting so much on these parameter is the correct choice. In the literature I’m not finding any suggestion on how to set these parameters, do you have any suggested reading?