The laser units are compact, class 1 eye safe, rugged, laser distance range finders which can be incorporated to function as an altimeter. Using time-of-flight technology, it measures the time taken for a very short pulse of infrared laser light to travel to a surface (ground or tree tops) and back. The distance to the target is calculated from the time taken to make the round trip.
The display in the cockpit allows the user to set the offset height for their aircraft (for example if the laser is mounted in the wing). Then the optimum height is programmed into the unit and a tolerance set. The display gives you the current aircraft height as well as an indication if you are above or below your "ideal" spraying zone.
