In this video, the system tracks the football during a running play. On the right is a 2D cartoon of the field. The red arrow shows the orientation of the ball. The yell line shows the angle of the ball above horizontal. When the ball is parallel to the field, the yellow line is the same length as the red arrow. As the ball is angled more vertically, the yellow arrow shrinks. Captions in the video explain the system operation.
For more information:
http://rickettslab.org/research/magneto-track/
source