Question

Which among the following statement(s) do you think might be true about the Global Positioning System (GPS)?

• A. The altitude of the GPS satellites is less than 2000 km from the Earth.
• B. A GPS receiver must receive signals from at least two of all the satellites to calculate an accurate location.
• C. The satellites use trilateration mechanism to find an accurate location.
• D. A GPS system requires a GPS receiver, which relies on the signals from a system of 24 active satellites.

Answer 1

Answer: (C), (D)

The correct options are
C The satellites use trilateration mechanism to find an accurate location.
D A GPS system requires a GPS receiver, which relies on the signals from a system of 24 active satellites.

A GPS requires a GPS receiver, which relies on the signals from a system of 24 active satellites placed at six different orbits around the Earth. The altitude of these satellites is between 20,000 km to 20,200 km from the Earth. The receiver receives signals from at least four satellite to confirm a particular location.