Sentinel 1 data accuracy assessment

how one can do an accuracy assessment for sentinel 1 SLC TOPSAR data set.

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Hi, I suggest you have a read through Sentinel-1 documentation available at In particular I suggest you start with the 2015 S1-A Annual Performance Report available at and then with the more recent N-Cyclic reports, the latest being available at

These reports describe the performance of S1-A in the various modes includes TOPSAR. Hopefully these will answer your question.