How to locate (longitude, latitude, altitude) in a Sentinel-1 SLC image?

Is there a standard way of computing the projection of a 3D point (longitude, latitude, altitude) on a SLC image from the metadata ?

For optical satellites the RPC camera model is widely used and allows to do this conversion very easily. Is there something similar for SAR?

Have a look at the help page for the Range Doppler terrain correction. It list several references.

Thank you! Do you mean this page?