Having to work on areas divided into several tiles it is better for me perform just one atmospheric correction and just one export in Envi format (without mosaicking several tiles in Envi).
Hello,
images released after 2016-12-06 you can only download for single Granules (around 100x100km) with newest naming conventions . For older images (between 2016-12-05 - 2016-09-26( or something)) you can download images for single Granules with oldest naming conventions. For images acquired before 2016-09-25 you can download images for all scene (around 290x290km) with oldest naming conventions. Somethings you can meet errors for images acquired before 2015-11-30 and download images as well as for single granules an all scene but is single accidents. I said about https://scihub.copernicus.eu/dhus/#/home