Dear Snap Developers,
I am trying to incorporate the Aster DEM into my S1 GRD workflows, where I:
- Apply Orbit File
- Calibration to Gamma0
- Lin to DB
- RD Terrain Correction
It seems that no proper ortho-rectification takes place compared to the same workflow when using the SRTM 1 Sec DEM (see image, left processed with Aster, right with SRTM).
If I add the Terrain flattening, it puts out even no data when using ASTER (calibrating to beta0 before). While it is not a problem for areas covered by SRTM, it is for areas outside SRTM coverage.
I am using Snap 7 (latest relaease), on a Ubuntu 16.04 LTS with 8 CPUs and 32GB RAM.
Can you please investigate that?