In October 2015 , the Sentinel - 3A launch was planned for December 2015 .
Delays in transportation from Cannes to the Plesetsk Cosmodrome postponed the launch to January 2016 .
In October 2015 , the Sentinel - 3A launch was planned for December 2015 , but delays in transportation from Cannes to the Plesetsk Cosmodrome postponed the launch to January 2016 .