GPS relies on how many satellites orbiting the Earth?

GPS relies on how many satellites orbiting the Earth?

• A. 12
• B. 24
• C. 8
• D. 32

Answer: (B)

GPS relies on a global satellite constellation designed for continuous coverage. The system was planned with 24 satellites arranged in six orbital planes, with four satellites in each plane. This setup ensures that, from any location on Earth, at least four satellites are visible at any time, which provides enough measurements to determine a precise position and time via trilateration. While today there are more than 24 active satellites in operation, 24 is the traditional number tied to the design and is the figure commonly cited for full coverage.

GPS relies on a global satellite constellation designed for continuous coverage. The system was planned with 24 satellites arranged in six orbital planes, with four satellites in each plane. This setup ensures that, from any location on Earth, at least four satellites are visible at any time, which provides enough measurements to determine a precise position and time via trilateration. While today there are more than 24 active satellites in operation, 24 is the traditional number tied to the design and is the figure commonly cited for full coverage.