I’m working with Sentinel-1 IW GRDH data. For pre-processing I have a processing chain consisting of “Apply Orbit File”, “Calibrate”, “Radiometric Terrain Flattening” and “Range-Doppler Terrain Correction”.
Since the last update of SNAP, there seems to be a problem with the Radiometric Terrain Flattening module. The VH polarization looks fine until it is entered into the Radiometric Terrain Flattering module. In the resulting data set, the VH polarization contains only NaN values.
The VV polarization is not affected by this.
Therefore, I assume a bug in the Radiometric Terrain Flattening module, which is quite annoying, as it was working fine so far.
I hope that this will be corrected as fast as possible as we want to use SNAP for a SAR Summer School.
I’m using the latest version of SNAP (with all the updates installed) on Windows 10 and on Linux (Ubuntu 18.04 LTS) and tried to process these scenes:
The reported issue occurs under Windows and Linux.
Thanks a lot and best regards…