Sentinel-2
Optical Imaging
The Sentinel-2 mission comprises a constellation of two polar-orbiting satellites placed in the same orbit, phased at 180° to each other. It aims at monitoring variability in land surface conditions, and its wide swath width and high revisit time (5 days) will support monitoring of changes to vegetation within the growing season. The coverage limits are from between latitudes 56° south and 84° north.
The satellites are equipped with the state-of-the-art MSI (Multispectral Imager) instrument that offers high-resolution optical imagery.

L1C products are Top-of-Atmosphere reflectances, in cartographic geometry. Products are compilation of elementary granules, also called tiles
A global data reprocessing activity of the Sentinel-2 historical archive was started generating consistent Sentinel-2A and Sentinel-2B time series with a uniform processing baseline.
L2A products are Bottom-of-Atmosphere reflectances, in cartographic geometry. In the same way as their associated L1C products, L2A products are compilation of elementary granules. Bands corresponding to atmospheric informations, are not kept from the L1C products
As presented for Sentinel-2 L1C Reprocessed. Let us know if this can be of interest for your business.