Are they breaking new ground here with Sentinel or in serving satellite data images -- what new ground would that be?
Distributing data seems like an afterthought; they're just now roughing out untested concepts for getting data to end users, with heavy dependence on beta testing by unpaid anonymous individuals outside the billion euro program -- yet what aspect could not have by debugged, tested with synthetic data, put on web in final form the day of the launch?
Excuse me, but this is the 6,601 satellite launched to date (3,600 remain in orbit, 1,000 operational). Surely these issues were all worked out by the late 1960's.
Arpanet was put out to bid in 1968. FTP internet servers date to 16 April 1971.
Photoshop was introduced in 1988, 27 years ago. Adobe released thirteen versions prior to the disastrous Oct 2003 introduction of Creative Suite branding. In February 2013 Adobe donated the source code of the 1990 1.0.1 version of Photoshop to the Computer History Museum.
Prefer to work with numeric pixel arrays? Microsoft first released Excel for the Mac on 30 Sept 1985. (No Excel 1.0 for DOS or Windows.)