(I’m not sure that my post is directly related to this forum, I can delete my post if necessary).
I’m currently working on S1 SAR images for vegetation analysis (maize parcels). I observed that few parcels are much brighter than the others regarding their VV polarization. The thing is that looking at a S2 image, I can’t see any difference that could explained why this is occurring. Note that this phenomenon seems to occur with bare ground only so I am suspecting an interaction between S1 and the ground. Also, it occurs at different acquisition dates (not only once), consequently it can’t be a “coincidence”.
I put an example, where the parcel at the left is clearly brighter than the others. This is a composite image (Red is linear VH and Green is linear VV). Values are close to 30, instead of ~0.3 for the normal parcels. I can give you more information/images if necessary.