Satellite laser altimeter can not only accurately measure the surface elevation of target, but also carry characters of target
surface on its return waveform. The return signals interacted by coastal zones and transmitted signal are simulated in this
paper, large number of return signal waveforms of Geoscience Laser Altimeter System are analyzed, and the change
rules of return signal waveforms of coastal zones relative to sea surface are concluded, which are peak decreasing, pulse
width widening, and mostly bimodal pattern. It is concluded that extracting coastline and locating the deserted island are
feasible with this method of analyzing return waveforms of laser altimeter.
Pavement rut is one of the major highway diseases. In this article, the method of measuring rut based on laser
triangulation is created. The rut-resolution model is established to design the parameters of optical system and the laser
profile of road image was extracted by median filter and wavelet transform. An accurate calibration method on large
field of view consisting of 28 sub-FOVs calibration and road profile reconstruction is also created. The process of
calibration experiment and a new calculation method of rut is described. The measurement results were showed, which
concluded the static test of gauge block and the dynamic measurement on highway. The conclusion is with this method
using single CCD camera and two semiconductor laser of 808nm wavelength can reach the accuracy of 1mm on rut
measurement in tough circumstance.