Analysis of influencing factors of airborne full-waveform lidar echoes

Airborne full-waveform lidar is an active remote sensing technology to obtain the information of earth's surface by processing the returned waveforms. Some new findings about influencing factors of airborne full-waveform lidar echoes were presented. According to the built synthesized echo model, the returned waveforms of three kinds of typical terrains were simulated and analyzed. Afterwards, the influences of reflectivity and detector response on the echoes were discussed. Normally, the echo will produce a fission under the ladder terrain of a certain altitude difference or under the sinusoidal terrain of a certain frequency, but it is found that the echo would not produce fission if the detector response is relatively slow. It is also found that the reason for the echo falling edge broadening is the slow detector response rather than the terrain slope.