I’m still trying to get correlation between NDVI (Vegetation index) and backscatter (dB) from sentinel-1 for my bachelor’s project in University. I have done some investigation and get different coefficients of correlation for any agriculture like corn,soy bean, sunflower etc. But I dont know how to remove this “jumps” (see my graphs, VV+VH).
My processing graph is:
- Apply orbit file (sentinel precise)
- Thermal Noise Removal
- Multilook (3)
- Terrain Correction
I worked with IW GRDH products.