I am using ALOS-2 data. After radiometric terrain correction, I have got Gamma naught image. After that, I just want to have the Sigma naught image from that Gamma naught image. Please help me. I have followed:
- Calibration: Beta naught
- Speckle filtering
- Radiometric terrain flattening
- Range Doppler terrain correction: Gamma naught
After that, I want to get Sigma naught. How to get it?..
I also want to know is my workflow correct or how can I improve it?