What are the three functional elements of GPS?

The three functional elements of GPS are indeed the space element, control element, and user element.

The space element consists of the constellation of satellites that orbit the Earth, transmitting radio signals that allow GPS receivers to determine their location. These satellites are positioned in such a way that at least four are visible to a receiver at any given time, which is necessary for accurate position triangulation.

The control element refers to the ground stations that monitor and manage the satellite constellation. These stations are responsible for tracking the satellites, ensuring their proper functioning, and updating their orbital parameters and clock data as needed. The control element is crucial for maintaining the overall performance and accuracy of the GPS system.

The user element encompasses the GPS receivers themselves, which can be found in a variety of devices, including vehicles, smartphones, and handheld navigation systems. These receivers interpret the signals sent by the satellites and use the data to calculate the user’s precise location, speed, and time.

Other options do not reflect the accurate categorization of the components essential for GPS function. The incorrect options mix terms or elements that do not pertain directly to the operational framework of GPS.