title: PNT for Defense
abstract: Space-Based Position, Navigation, and Timing (PNT) services were conceived, designed, and developed in response to specific defense capability needs. PNT services are recognized as critical enablers for defense operations and as such must be available with the greatest possible robustness and dependability. Operational advantage of having access to such services is so evident that not only the military but also civilians started to exploit them up to the point that nowadays space-based PNT have 