HOW TO DOWNLOAD SENTINEL DATA FROM ESA
Important !!!
if you can't see scientific hub just click open hub.
http://step.esa.int/main/doc/tutorial...
how to download sentinel data from esa , The Sentinels Scientific Data Hub provides free and open access
https://scihub.copernicus.eu/
error at 8:44 -9:32
you can use snap ( http://step.esa.int/main/toolboxes/snap/) or other software to process the data