GNSS vulnerability is well-known, and search continues to find another independent system, preferably terrestrial, that can provide PNT services when GNSS services are denied or unavailable. NAB has invented and has been deploying, in collaboration with TV broadcasters, a terrestrial PNT solution known as Broadcast Positioning System (BPS™) that uses the ATSC 3.0 enabled TV facilities to deliver time. BPS service can provide timing to national critical infrastructure that depends on GNSS time and thus is vulnerable. When fully deployed, free-to-use BPS service can also be used to complement GNSS service for the public. 

US Government agencies are aware of BPS’s potential, and they have explicitly mentioned BPS in public communications. NAB has won a DOT contract to provide BPS service for testing in the Washington DC area. Companies in the PNT industry are collaborating with us, and potential users of BPS have approached us for trials. The new 4-channel receiver has been developed and is being tested in our lab. BPS Aggregator module for the transmission chain and a network management system is under development and will have beta versions available by early 2026. Additional deployments and testing in New York are being planned. South Korea and Canada are interested in BPS research and collaboration. 

This presentation will be a progress report summarizing the BPS activities NAB and its partners are pursuing.