The competitive aerobatic community is in need of a modern method to determine if a competitor has remained within the confines of our aerobatic box. We currently position two people at opposite corners of the box, and they use sighting devices to determine if a competitor has left the box.
I have attached a screenshot of a practice flight for N166 in the Thunderbird Aerobatic Box. An aerobatic box is 1000m high, 1000m wide, and 1000m long. I physically observed the flight from the ground, and the aircraft remained inside the confines of the box throughout the flight, yet the displayed ground track shows the aircraft departed the confines of the box. I suspect these are when the aircraft was in looping flight, or vertical flight.
Is there a way to correct for this? What if we had a portable ADS-B antenna positioned adjacent to the box? If a solution was available, we could incorporate this into our national competitions as the method to determine boundary infractions.
Suggestions are appreciated