The foundational need to know our location and time is at the heart of position, navigation, and timing (PNT) infrastructure. For the last half century, PNT and GPS (the US Global Positioning System) have been interchangeable; there are 8 billion GPS receivers in the world – one for every person on Earth - and GPS pervades all aspects of our lives: our location on digital maps and ridesharing apps, commercial and airline navigation, the timestamp on ATM, credit card and stock

GPS is the gold standard for many reasons but independance from GPS is coming, and no declaration is required.