Answer:Three
Explanation: Actually minimum four satellites are required to accurately locate an object in where in space . However three satellites can also serve the purpose but the located-position is less accurate. In case of three satellites the Global Positioning System approximates the location by assuming that the user is at mean sea level.
> single satellite locate the object on a sphere
> two satellites narrows down the location on a circle
>Third satellite locate the position of object above the horizon
