What is the primary function of the GPS control segment?

• A. To operate the GPS system
• B. To manufacture satellites
• C. To publish maps for users
• D. To manage ground logistics of stations

Answer: (A)

The GPS control segment’s job is to operate and maintain the entire GPS constellation. It includes ground facilities that monitor satellites, compute their precise orbits and clock corrections, generate the navigation messages, and upload those data back to the satellites. This keeps the constellation accurate and healthy, with up-to-date ephemeris and clock information that receivers use to determine position. It doesn’t manufacture satellites, it doesn’t publish maps for users, and while it does manage the ground network that supports the satellites, its primary role is controlling and maintaining the system as a whole.