Question

Which theoretical minimum number of measurements from satellites does a GPS receiver need in order to provide an exact three-dimensional position?

a) 2
b) 3
c) 4
d) 5

Answer 1

The correct option is c) 4. A GPS receiver needs a minimum of 4 measurements from satellites to provide an exact three-dimensional position.

Step-by-step explanation:

To provide an exact three-dimensional position, a GPS receiver needs a minimum of 4 measurements from satellites. This is because GPS relies on an array of 24 satellites orbiting the Earth, and at least 4 of them are visible from any spot on Earth.

Each satellite carries a precise atomic clock, and your GPS receiver calculates your position based on the time it takes for the signals from these satellites to reach you.