recently for geometric correction i just made image to image georefencing using envi application with optical and radar data. basicly warped the sentinel 1-data radar data using GCP’s picked on optical sentinel 2-A. Then i realized i didnt use any DEM on radar data. So does it mean i couldnt remove the SAR geometry distortions such as Foreshortening? if the answer is yes is there any way the remove those effects without using range doppler terrain correction?
Thank you all in advance