I’m sharing our article on RTC correction of geocoded backscatter products that was recently published:
The key takeaways:
- Sentinel-1’s narrow orbital tube allows for the use of static RTC factors - this significantly reduces resources needed to perform RTC corrections
- A generalized framework for both InSAR and RTC as both these applications try to undo the effects introduced by difference in imaging geometry between acquisitions.
- A testing framework for RTC processors that uses actual SAR metadata but constant valued imagery. This allows for building unit tests for RTC with synthetic data.
- The testing framework identified issues in steep terrain with SNAP. This relates to various threads on this forum related to subsetting, use of single precision coordinates and DEM oversampling.