EW and IW images not aligned

[piyushrpt]

This is the same issue as

Range Errors between granules in S1-GRD captures

Hi, I’m trying to understand what correction (mathematically) still needs to be applied to GRD images in order to project them to a regular WGS84 such that points in a rendered tiff align between different granules. Note that in this case, I’m monitoring the edges of islands, which are (approximately, and certainly to a greater degree than would explain the error I’m seeing) at sea level so there should be no need for DEM-based RTC correction. Take, for example, these 2 images, which are small…

the difference in average height used to GRDs can be much higher due to the difference in swath widths.