Persistent scatterer interferometry

I’d like to compute time-series subsidence over a city with differential interferometry. I have finished learning the fundamentals of interferometry. When calculating subsidence over an urban area, I discovered that the PSI (persistent scatterer technique) provides better time-series subsidence information. Can you provide a basic tutorial that covers all of the basic steps required for the PSI technique?

It is a better tutorial to learn the processing steps in a straightforward manner.
StaMPS/ · master · Matthias Schlögl / gis-blog · GitLab