regarding traditional DInSAR, the principle stays the same. You compute interferograms and analyze the displacement between different image pairs. Some topics on this:
- Urban subsidence steps( wok flow) with sentinel 1 or radarsat data
- How to create time series of DEMs?
- Coregistered SLC stack for Envisat
- Perpendicular baseline chart
- Time Series Generation of velocity using Different Masters
A tutorial is given here:
https://eo-college.org/resources/insar_deformation/
Regarding Persistent Scatterer Interferometry, we compiled all useful information here: About the STaMPS category