I used to deal with radar data long ago (2006-2007) and it was for other purposes. Since then much happened.
I’m trying to make a deformation map or any kind of map that a landslide can be identified and shown. For later I would like to make an evolution map for the displacements of the landslides. For starters I downloaded some ALOS-1/PALSAR Level 1.1 FBD (HH and HV) and FBS (HH), same ascending track and different relative orbits, imagery from SSARA/UNAVCO for testing purposes and to get familiarized with SNAP and Radar data again. I read much of the content, tutorials and the forum here.
One of the 1st steps is to DSk the images as I read it here on the Forum. And I did that for all the FBD imagery first. Then I proceeded with one pair coregistration to perform a test. But the results ended up black and I was unable to go further! I wonder if this works if I subset the bands to select the co-pol images HH prior to the coreg step or it is some problem with my images or else. The temporal baseline is roughly 30 days for the selected pair.
I also read it here that it’s best to make everything, in terms of InSAR- DInSAR, prior to subsetting the scene to my coordinates.
Any help? I guess there’s no graph made for this use of ALOS imagery?