Which statement accurately describes the GPS 'space' segment?

• A. It refers to the ground stations used to monitor satellites
• B. It consists of satellites in orbit that broadcast navigation signals
• C. It is the processing center on the ground
• D. It is the user equipment aboard the aircraft

Answer: (B)

The space segment is the constellation of satellites in orbit that actively broadcast navigation signals. Each satellite carries an accurate clock and transmits signals containing timing and orbital data. A receiver uses the time it takes for those signals to reach it from multiple satellites to determine how far away each satellite is, solve for its own position, and correct its clock error. This capability relies on the satellites themselves, not ground facilities or the user’s equipment. Ground stations and control centers that monitor and maintain the satellites make up the ground control/monitoring side, while the aircraft’s onboard receiver is the user segment.