How many Global Positioning System (GPS) satellites are required to yield a three dimensional position (latitude, longitude, and altitude) and time solution?
A
4.✓ Correct Answer
B
5.
C
6.
Explanation
AIM 1-1-17 says a minimum of four satellites is necessary for a receiver to establish an accurate three-dimensional position (latitude, longitude and altitude) and time. A fifth satellite is needed for RAIM fault detection, not for the basic solution.
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