Wanted: A fallback for GPS: The U.S. government seeks tech that could step in if its global satellite fleet were to fail - [News]

The U.S. Global Positioning System fleet of satellites provides critical data for navigation apps, banks, power grids, and other commercial and government infrastructure. But for the past decade, it has operated without a safety net, with no backup system in place. Now, two U.S. federal agencies want to change that, and they could select one or more alternatives by September.