What are the two main components of an unmanned aircraft system?

The correct choice highlights the two primary components of an unmanned aircraft system, which are the aircraft (often referred to as the drone) and the ground control station. The drone is responsible for flight operations, while the ground control station serves as the central hub for controlling and monitoring the drone's activities. This includes inputting flight commands, receiving telemetry data, and managing overall system operations.

Including both the aircraft and the ground control station emphasizes the collaborative nature of unmanned systems, as the effectiveness of the drone depends heavily on the operator's ability to control it through the ground station. This pairing is essential for safe and efficient operations, ensuring that the pilot can maintain situational awareness and intervene if necessary.

In contrast to the other choices, the control tower mentioned is not typically relevant in the context of unmanned systems, as they function independently of manned air traffic control unless operating in controlled airspace. The control station and remote pilot option dismisses the importance of the drone itself, while the inclusion of a communication satellite is not a fundamental component of all unmanned aircraft systems, as many systems operate on direct radio links between the drone and its ground control station.