Global Positioning System (GPS) provides which kind of information?

• A. Meteorology
• B. Missile Warning
• C. Space Surveillance
• D. Worldwide Positioning, Navigation, Timing, and Velocity Information

Answer: (D)

GPS is a space-based system designed to deliver four key outputs worldwide: your exact position, how to navigate from that position, precise time, and your velocity. A receiver determines where you are by measuring how long signals take to reach from multiple satellites with known positions; with at least four satellites, it solves for your three-dimensional location and the receiver’s clock error, giving a precise global position and time reference. The velocity information comes from the Doppler shifts of the received signals, which tell you how fast and in what direction you’re moving. The time data come from the satellites’ highly accurate atomic clocks, enabling synchronization to GPS time across networks and systems.

Other options describe functions that GPS isn’t primarily designed to provide, such as weather data, missile warning, or space surveillance, which rely on different sensors and systems. The comprehensive output—global positioning, navigation, timing, and velocity information—best captures what GPS offers.