Which statement best describes how a GPS receiver achieves simultaneous tracking of multiple satellites?

• A. The use of dedicated channels
• B. The use of multiple ground stations
• C. Code scrambling for each satellite
• D. The use of satellite orbit prediction

Answer: (A)

Parallel tracking is achieved through dedicated tracking channels inside the GPS receiver. Each channel acts like a separate path that locks onto one satellite’s signal, using a locally generated replica of that satellite’s unique code and carrier. With multiple channels, the receiver can maintain simultaneous locks on several satellites, each with its own code and carrier tracking loops (code delay and Doppler adjustments). This parallel approach lets the receiver collect pseudorange measurements from many satellites at once, providing the data needed for a reliable position solution. If the receiver relied on a single channel, it would have to switch between satellites, breaking continuity and reducing availability. Ground stations and orbit prediction play different roles, such as corrections or forecasting satellite positions, but they don’t enable the receiver to track multiple satellites at the same time.