First, issues with the launch meant that the comet 46P/Wirtanen, the original target, couldn’t be reached so comet 67P/Churyumov–Gerasimenko was chosen instead. Ed Trollope, Copernicus Sentinel-3 Spacecraft Operations ManagerIn the end, the November 2014 touch down of Rosetta’s Philae lander on the alternate comet’s surface didn’t go as expected, either. As EUMETSAT’s Copernicus Sentinel-3 Spacecraft Operations Manager, he oversees the team responsible for ensuring that the mission’s satellites and instruments are functioning properly, including any necessary calibrations and maintenance procedures. This includes monitoring three satellites: Copernicus Sentinel-3A and -3B, currently in orbit, and Copernicus Sentinel-3C, to be launched later this year. “Occasionally, the mission managers or the scientists will present something that they've been doing with the Sentinel-3 science data,” he said.