A cluster of satellites set to launch in the coming days could move the aviation industry closer to overhauling the way air-traffic controllers track planes around the world. For decades, controllers have used ground-based radar to direct planes over land. More recently, they have been finding aircraft locations via global positioning satellites, or GPS, but they can do so only over land or near the shore. There has been no ability...

Source: Wall Street Journal January 13, 2017 10:31 UTC