SAR Simulation information

Hello everyone!

I wanted to use this space to ask about something about the SAR Simulation operator.
I have read the source code, but I still have some doubts.

  • First: How are the local incidence angle and terrain normals calculated here (the notation is confusing)? Maybe some literature where to find these formulas

  • Second: What are the constants used in the calculation of backscattered power? Where can I find some literature about it?

Thank you very much