I just want to figure out how to extract backscattering coefficient(BC) from RadarSat-2 product. In my opinion, BC is the DN values after the radiometric calibration, is that right? And should I extract BC using pixel extraction tool? If so, how should I set the parameters in this tool?
Actually, all you need is to apply the radiometric calibration on your intial product. You find it in the menu under radar > radiometric > calibration
It converts your DN / Intensity values to Sigma0 (the bacscattering coefficient).#
If you want to read values at specific pixels, the extract pixels tool is the correct way to do it, but you can also use the pin manager (https://www.youtube.com/watch?v=5znAQH6vrLs starting at about 2:00 minutes)
thank you so much! I got it.