A topographic parameter inversion method based on laser altimetry

查看全文 作　　者：HUANG [1,2,3]ChunMing;ZHANG [1,2,3]ShaoDong;CHEN [1]Xi

机构地区：[1]School of Electronic Information,Wuhan University,Wuhan 430079,China;[2]Key Laboratory of Geospace Environment and Geodesy,Ministry of Education,Wuhan 430079,China;[3]State Observatory for Atmospheric Remote Sensing,Wuhan 430079,China

出　　处：《Science China(Technological Sciences)》索引2012年第55卷第5期,共8页

基　　金：supported by the National Hi-Tech Research and Development Program of China (Grant No. 2007AA12Z177) 摘　　要：A topographic parameter inversion method based on laser altimetry is developed in this paper, which can be used to deduce the surface vertical profile and retrieve the topographic parameters within the laser footprints by analyzing and simulating return waveforms. This method comprises three steps. The first step is to build the numerical models for the whole measuring procedure of laser altimetry, construct digital elevation models for surfaces with different topographic parameters, and calculate return waveforms. The second step is to analyze the simulated return waveforms to obtain their characteristics parameters, summarize the effects of the topographic parameter variations on the characteristic parameters of simulated return waveforms, and analyze the observed return waveforms of laser altimeters to acquire their characteristic parameters at the same time. The last step is to match the characteristic parameters of the simulated and observed return waveforms, and deduce the topographic parameters within the laser footprint. This method can be used to retrieve the topographic parameters within the laser footprint from the observed return waveforms of spaceborne laser altimeters and to get knowledge about the surface altitude distribution within the laser footprint other than only getting the height of the surface encountered firstly by the laser beam, which extends laser altimeters' function and makes them more like radars. 关键词：地形参数反演方法光测激光高度计特征参数数字高程模型内表面垂直剖面

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A topographic parameter inversion method based on laser altimetry

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