Question

Explain the Space Segment of Global Positioning System (GPS).

Hint:

The Space Segment is simply the "satellites in the sky" doing the actual broadcasting work for your GPS!

Answer 1

Step 1: Concept
The Global Positioning System (GPS) is composed of three interdependent segments: Space, Control, and User.

Step 2: Meaning
The Space Segment consists of the actual physical hardware orbiting the Earth that transmits the positioning and timing signals down to user devices.

Step 3: Analysis

• It comprises a baseline constellation of at least 24 operational satellites (often more, currently up to 31 or 32) orbiting the Earth.
• These satellites are arranged strategically in 6 specific orbital planes at an altitude of approximately 20,200 km, completing two orbits a day.
• This specific geometric arrangement ensures that a minimum of 4 to 6 satellites are always visible from any unobstructed point on the Earth's surface at any given time, which is the minimum requirement for a receiver to calculate a 3D position.

Step 4: Conclusion
The space segment acts as the broadcasting network, blanketing the Earth in continuous radio signals. Final Answer: The Space Segment consists of a constellation of at least 24 satellites distributed across 6 orbital planes, continuously transmitting precise radio signals to users on Earth.