Space MIAD Practice Test 2025 – The All-In-One Guide to Exam Success!

The correct choice identifies attitude sensors as essential for controlling a satellite's orientation. These sensors play a crucial role in determining how a satellite is positioned relative to a reference frame, such as the Earth or celestial bodies. They provide constant feedback on the satellite's attitude—its orientation in space—allowing the onboard systems to make necessary adjustments.

Attitude sensors can include devices such as gyroscopes, magnetometers, and star trackers. Gyroscopes measure the rate of rotation, while magnetometers can help determine the satellite's alignment with Earth’s magnetic field. Star trackers utilize the position of stars to ascertain the satellite's orientation with high precision. This information is vital for ensuring that the satellite maintains its desired trajectory and orientation, especially when performing tasks like communication, navigation, or observation.

While propulsion units are important for maneuvering the satellite and making larger adjustments to its orbit, they rely on the data provided by attitude sensors to execute these maneuvers accurately. Similarly, navigation signals and ground control provide valuable support and commands, but they do not directly measure or control the satellite's orientation.