Air Force navigation satellite experiment applying lessons from GPS

The U.S. Air Force Navigation Technology Satellite-3 — a flight experiment seven years in the making — is undergoing final tests ahead of a projected 2024 launch. A lot is riding on this project. The $250 million experiment led by the Air Force Research Laboratory aims to deliver novel technologies for space-based positioning, navigation, and timing (PNT). It’s also seen as a test case for the management of the so-called PNT enterprise, which includes the satellites, the ground system and the receivers that allow users to talk to the satellites. More

(Source: SpaceNews - Apr 29)