Thanks, is there a way to obtain Sentinel-3 OLCI bands in surface reflectance values? or it is currently only possible to obtain top-of-atmosphere reflectance?
Surface reflectances are currently only available in S3A_OL_2_WFR products.
So only for water. AC processors are currently in development and will become available this year. Also as tools for SNAP. Regarding the synergy L2 products, I have no idea when they will be released.