Why is TRU called a “Virtual Drill”?
Radar waveforms are automatically pulsed and internal trunk reflections recorded for every 0.2 in (5 mm) of movement around the entire circumference (for each elevation scanned) to determine if decay is present. If so, the amount of remaining solid wood is calculated. This is equivalent to “drilling” a hole every 0.2 in (5 mm) around the circumference; hence, a “virtual drill”.
