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

[smithalas]

Hi all. Thanks to helpful advice from others, I now understand it is possible to determine the local incidence angle for S-1 SLC products from the Range Doppler Terrain correction step, outputting a band for local incidence angle.

However, I am also interested to know is it also possible to determine the local satellite look angle? Any advice here would be greatly appreciated.

[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.

[smithalas]

Thank you falahfakhri

[anirudhavm]

Is it assumed/considered that the look angle and incidence angle is the same? I see many posts where look angle and incidence angle are used synonymously.

[Hornbeam]

I’m agree with anirudhavm.
falahfakhr, why you recommend the solution for incidence angle issue if the author asked for look angle?

And the question is open: how to determine the look angle from Sentinel-1 products?