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Q78 (CAPF/2026) Science & Technology › Space & Defence Technology

Consider the following statements :
1. GPS uses signals from a network of satellites to determine a position on the Earth.
2. The GPS receiver calculates the distances from satellites to triangulate the exact location by the use of latitude.
Which of the statements given above is/are correct?

Result
Your answer: —  ·  Correct: A

Explanation

Statement 1 is correct. The Global Positioning System (GPS) is a satellite-based navigation system consisting of a constellation of satellites that transmit signals to receivers on Earth to determine precise geographical locations.

Statement 2 is incorrect. GPS receivers use a process called trilateration, not triangulation. While triangulation measures angles, trilateration measures distances by calculating the time it takes for signals to travel from satellites to the receiver. By determining the distance from at least four satellites, the receiver can solve for four unknowns: latitude, longitude, altitude, and time. Latitude is an output (a coordinate) of the positioning process, not the method used to calculate the location.

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