About the size of a small coin, this device detects changes in inertia. It does it by having patterns of light reflected back on themselves inside the unit and watching the phase change in the light as the IMU is moved from one location to another (i.e. its inertia changes). This device is an improvement on ring-laser-gyros (RLG).
A set of gyroscopes on the Shuttle used to measure the orbiter attitude. Gyro drift introduces a significant, time- dependent error into this measurement.
The Inertial Measurement Unit (IMU) is a Shuttle orbiter navigation system which provides attitude and velocity data to the Guidance, Navigation, and Control (GNC) system.
a device that can sense acceleration in three degrees of freedom and also its orientation
A system used to capture the orientation parameters (roll, pitch and yaw) of an aircraft at any given point in space and time. That data used in conjunction with ABGPS data can be used to supplant or validate the Aerial Triangulation solution for a project.