I am trying to create P-Band RTC backscatter products from Level-1B Biomass images in SNAP. The aim is to incorporate that type of data into classification and change detection workflows (a bit off from purely biomass retrieval). I am using the latest SNAP 13 with all installed updates.
A couple of issues I am encountering:
Reading the downloaded zip fails with an error. Workaround: opening the xml file within the unzipped archive works.
Terrain Flattening does not work. I tried directly on the Amplitude/Intensity data (which does not run into an error, but the result is not correct), as well as calibrated beta0 backscatter, which results in an empty tile error.
Terrain Correction on a calibrated gamma0 image gave a completely wrong result. (see screenshot)
This is caused by the single set of SRGR coefficients in the product. Generating a full set fixes the problem. I’ll have an update available this week.
it seems the update is in place now, thanks for the quick adjustment. I recognised, however, it only seems to solve the issue of the terrain correction. I still can’t read the zip itself (not sure this should actually work?) and I am also not able to run the terrain flattening with success. It runs without error, but produces an artefact loaded output (see screenshot). I first calibrated to beta0 and used the output of the calibration within the terrain flattening operator.
