Which one among the following is the correct method employed by GPS to find the location of a target?

Correct option is A

The correct answer is (a) Trilateration method
Explanation:
• GPS uses trilateration: computing distances from multiple satellites with known positions.
• Time delay of satellite signals gives range; intersection of spheres yields position.
• Minimum of 4 satellites required for 3D position + clock correction.
• GPS satellites are in MEO, not geostationary/polar for positioning.
Information Booster:
• Accurate timing (atomic clocks) underpins distance measurement.
• Receiver solves for x, y, z and clock offset simultaneously.
Additional Knowledge:
(b) Dilation method — Not relevant.
(c) Geostationary satellites — Not used in GPS constellation.
(d) Polar satellites — Not used for standard GPS trilateration.