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Positioning, Navigation, and Timing (PNT)

Information about where something is, how it's moving, and the precise time. GPS is a common source for PNT.

Low Earth Orbit (LEO)

An orbit relatively close to Earth's surface (typically 100 to 1,200 miles high) where many satellites, including those for internet and imaging, operate.

Global Positioning System (GPS)

A satellite-based navigation system owned by the U.S. government and operated by the U.S. Space Force, providing positioning, navigation, and timing services to users worldwide.

Jamming

Deliberately interfering with a radio signal, like a GPS signal, to prevent a receiver from working properly.

Spoofing

Broadcasting fake signals that mimic legitimate ones (e.g., GPS signals) to deceive a receiver about its actual location or time.

Nanosecond

One billionth of a second, used to measure extremely precise units of time.

Covered service provider

A U.S.-based commercial company that offers positioning, navigation, and timing services using low Earth orbit satellites.