Fenwick and Trela are apparently joining a team led by Dropcam founder Greg Duffy, though there's no concrete information about their assignments at Apple. However, there's precedent for a nascent satellite program: Technology industry giants including Facebook, SpaceX and Google are designing drones and satellites to deliver internet to rural regions of the world.
It wouldn't be surprising for Apple to dive into this industry, too. After all, more internet users means more potential consumers. Of course, satellite technology can also be used in imaging, another area of interest for Apple as it expands its Maps service and starts dabbling with autonomous cars.