The resulting model posits that the dimeric motor moves like a compass, rotating around its bound head during the powerstroke, and the direction of this rotation is the same through a processive period.
Unlike the Awacs' rotating radar, which is mechanically turned so it scans every compass point once per rotation, the Wedgetail's radar is fixed, and the direction it "looks" is programmed electronically.
Then, we use appearance images to obtain a visual compass, and we calculate the relative rotation and heading of the aerial vehicle.
Measurement of the rotation in relation to a compass yields the amount of vertical water movement.
The measurement system consists of a plastic helmet fitted with two spirit levels to judge and control the position of the head, two gravity goniometers and a compass to measure flexion, extension, lateral flexion, and rotation.
Thoracic kyphosis (TK), lumbar lordosis (LL), and active spinal range of motion (ROM), in particular flexion-extension, right and left inclination, and right and left rotation, were evaluated by means of a validated pocket compass needle goniometer (IncliMed, Patent no. 0001331516, University of Padua) [ 33, 34].
Gyro-compassing depends on the gyro measurement due to Earth's rotation rate to initialize azimuth.
The compass provides a fixed reference point to mark the start of each rotation.
Note that magnetic north (as measured by a compass) differs from geographic north, which corresponds to the planet's axis of rotation.
Using the iPhone's compass, the Roto setting allows NECLUMI to react to a person's bodily rotation.
