How to prepare Sentinel-1 images stack for PSI/SBAS in SNAP

[Shadi1]

@mdelgado

that depends on which APS method you will like to use. The ones depending on stocastical models

used the time series filtering linear phase correction method and the results are questionable due to the persistence of topographic pattern indicated by the PS points either before or after the removal of the calculated atmospheric phase, as shown here

Atmospheric Correction for InSAR

This is how the velocity map look like "ps_plot (‘vdrop-do’) look like. I see that it’s barely ever changing when dropping an interferogram at a time. [vdrop-do calculated several time and at each time one ifg is excluded] and Those are (‘v’) top figure , (‘v-do’) middle figure and (‘v-dao’) bottom figure after stamps(7,7) [v] [v-do to see if the a has an effect on v] [v-dao] I can see that the removal of tropospheric contribution using the most basic APS linear has changed the LOS relat…

and also due to the noisy time series plot which shows random displacement pattern for each PS selected

ps_plot velocity

The annual displacement plot is noisy [Screenshot from 2022-11-05 13-01-58] Edit* And this is the MLV standard deviation from a previously selected reference and but I cannot quite understand the result. The area covered by red ps points is relatively high and there’s a cliff located at the transition from red to yellow points northwards, while the white region due east is just a huge water body [vs-dao standard deviation of MLV due to a reference 32.2 29.35 radius 300m] Could that be be…