I have been working with snap python for a while but mostly with S2, right now I am trying to do interferometry with S1, but I found myself in trouble when doing the back-geocoding.
The images selected are SLC of the same (identical) area & location, with ~2 weeks of difference.
The point is that the back-geocoding returns me two different 2 errors:
- For the ACE DEM and the CDEM the error is the following:
The error of NullPointerException is an error that I don’t understand. As you can see in my debugger, the error is when writing down the BEAM DIMAP file (I guess all the processing is fine, therefore)
- For the Aster DEM there are no errors but it returns me an empty (0.0 values!) slave image (the master is ok). Why?
(Bonus error) For the SRTM the error is the following: “org.esa.snap.core.gpf.OperatorException: Entire image is outside of SRTM valid area. Please use another DEM.” - Ok, I got that one.
The region I am working is the north Baltic sea, specifically near Oulu, Finland.
Please help me understanding these errors. In the image I posted you can see the arguments and the function “back-geocoding” for further information.
Thanks a lot! That’s a great forum!
p.D.: I am using Snap 7.0 and Python 2.7