I have IW data and I want to get backscattering image from it. I do not know what are the best steps for it but I did like this:
- S_1 Tops split
2- Apply orbit file
3- Callibration—I chose Beta0
4-S_1 Tops deburst
6- Terrain flattering
7- Terrain correction
8- speckle filtering
11- Raster—Data conversion—Linear to/from db
A. Are these steps good and enough for backscattering?
B. As I know for backscattering we should use Sigma0 in calibration processing but when I use Sigma0, then I can not do terrain faltering. What can I do now?
C. What is the difference between Sigma0, Gamma0 and Beta0? Why does Sigma0 use for backscattering?
D. When I do terrain flattering, it coverts Beta0 to Gamma0. Why?
D. Frankly speaking, I just heard people do terrain flattering but I do not know why? Would you please explain for me?