Linked from
The 25 pages that link to Gyroscope, each with the reason it gives.
Angular velocityRelated: Gyroscopes detect angular velocity to track rotational motion.
Axis of rotationRelated: Its spinning rotor's axis helps define and track orientation.
Inertial measurement unitRelated: Its readings track rotation between orientation updates.
GimbalRelated: Gyroscopes can sense rotation for gimbal-based stabilization and pointing.
Radian per secondRelated: Its rotation rate can be expressed in radians per second.