Algorithm of geometry correction forairborne 3D scanning laser radar

摘要

Airborne three-dimensional scanning laser radar is used for wholesale scanning exploration to the target realm,then three-dimensional model can be established and target features can be identified with the characteristics of echosignals. So it is used widely and have bright prospect in the modern military, scientific research, agriculture and industry.At present, most researchers are focus on higher precision, more reliability scanning system. As the scanning platform isfixed on the aircraft, the plane cannot keep horizontal for a long time, also impossibly for a long time fly in the routewithout deviation. Data acquisition and the subsequence calibration rely on different equipments. These equipmentsbring errors both in time and space. Accurate geometry correction can amend the errors created by the process ofassembly. But for the errors caused by the plane during the flight, whole imaging process should be analyzed. Take theside-roll as an example; scanning direction is inclined, so that the scanning point deviates from the original place. Newdirection and coordinate is the aim to us. In this paper, errors caused by the side-roll, pitch, yaw and assembly areanalyzed and the algorithm routine is designed.