there are useful materials provided by ESA:
Please have a look at documents, especially
- A: chapter 2.1-2.5 Introduction
- B: chapter 1. Selecting ERS images for InSAR processing
- C: chapter 1.2.2 Impact of the baseline on coherence
By the way: Why did you not directly continue here where we talked about baselines? Sentinel-1 Interferometric Concepts? It’s not necessary to open a new topic for every question.