Thank you for your work to give an example for SNAP-StaMPS tutorial.
Just like you said, the noisy ifgs is not the major problem, however, when building the stack with BackgeocodingOP, the default resample method is BI(Bilinear_Interpolation), not NN(Nearest_Neighbour),and I do not meet any problem with the default method.
In theory, these two resample methods are not the best choise, according to the manual of doris_v4.02, Raised Cosin is best(theroy 0.9999), here are the screenshots of RESAMPLE step in Doris.
Doris input file:
As for better trend/unwrapping result, in my experience, I think these parameters should be more careful in StaMPS processing:
density_rand in step 3
weed_standard_dev and weed_time_win in step 4
unwrap_grid_size and unwrap_time_win in step 6
And I am also very interested about your TS result, as I know, StaMPS can only get time linear deferomation, how did you get TS result like you plot? And did you use other data or software to subtract atmosphere?
Hope this helps,