The Global Positioning System consists of three segments. Which of the following is NOT one of them?

The Global Positioning System (GPS) indeed comprises three distinct segments: Space, Control, and User.

The Space segment includes the constellation of satellites orbiting the Earth, which transmit signals to provide location data. The Control segment consists of ground stations that monitor and manage the satellites, ensuring their proper operation and accuracy. Finally, the User segment pertains to the receivers that individuals and devices utilize to interpret the signals transmitted by the satellites, allowing them to calculate their geographic position.

While "Ground Level" may seem related to the Control segment, it does not accurately describe one of the official segments of GPS. Therefore, identifying "Ground Level" as not being one of the three segments aligns with an understanding of the structure and functions of the Global Positioning System.