India Exam Junction

[Election Kanungo Sept, 2021]

13. GPS requires use of______.

  1. Three satellites for an earth surface fix

  2. Four satellites for a 3D fix

  3. No satellites

  4. Both (a) and (b)

Correct Answer :

Both (a) and (b)

Solution

For GPS (Global Positioning System), at least three satellites are needed to determine a location on the Earth's surface (2D fix). To calculate a 3D fix (latitude, longitude, and altitude), at least four satellites are required. This ensures accurate positioning and elevation data.

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