Is it possible to determine the local look angle from S-1 SLC data?

[falahfakhri]

Please take a look at this

How to get a local incidence angle map from SAR-Imagery?

After coregistration, the terrain correction only knows the incidence angle of the master geometry. If you want both local incidence angles of master and slave then terrain correct both individually.

And this

Incidence angle image COSMO SkyMed

For Sentinel-1, it comes from the incidence angles in the geolocation grid within the product metadata annotation. For Cosmo-Skymed, a grid is created based on the near and far incidence angles in the metadata. The tie point grids created by SNAP are then interpolated on the fly for each pixel in the product.