The Defense Department is conducting a study to determine the risks and technical challenges associated with procuring positioning, navigation and timing receivers that can receive PNT signals from multiple systems, beyond GPS. At least five space-based PNT networks are currently being operated by countries or consortia around the world, but military receivers are designed only to connect with GPS. In the event that GPS was disabled, those users wouldn't have access to crucial PNT information because they're reliant on that...
