I tried to import Sentinel 3 OLCI imagery to Arc pro in order to create Mosaic data set of New Zealand but some images were distorted after importation to Arc Pro. I opened these images in SNAP (Sentinel open source Imagery software ) and it worked perfectly in SNAP. I checked coordinate system and they were fined
Did you use Pro 2.5 and the Raster Type for Sentinel 3 available since this release? Or did you try to use the native NetCDF data-files from the Scene-Folder (which wont work)?
I imported Sentinel 3 RGB image to ArcGIS pro. The image shown in ArcGIS landed at right place but at wrong angle. So I used reprojection in SNAP before importing to ArcGIS pro.