This is an extended test of the automated tracker with revised mounting arrangements on the Tracker head. The Plane sends it's GPS position to the Tracker via a Telemetry Radio. The Tracker has it's own Pixhawk Flight Controller with GPS and Compass, so it knows it's own position and the orientation of the Tracker head. The Pixhawk does the maths and drives the servos to point at the plane. The Tracker head has a Video Receiver with a high-gain directional antenna to provide reliable video from the plane to the Ground Station. Easy !