作　　者： ; ; ; ; ; ; ; ;

机构地区： 北京航空航天大学仪器科学与光电工程学院

出　　处： 《红外与激光工程》 2012年第7期1772-1776,共5页

摘　　要： 地形地物的回波信号特性影响着星载激光测高仪测量精度。对星载激光测高仪回波脉冲信号进行了理论分析,建立了地形地物数学物理模型,对不同地形地物的回波信号进行了数值模拟研究;在采用不同回波信号检测的情况下,分析了不同地形地物造成回波信号的变化所引起的测量误差。研究结果对保证星载激光测高仪测量精度具有重要的意义。 The ranging performance of satellite laser altimeter is influenced to a great extent by the waveforms of returned signals reflecting the target surface characteristics. The analysis of the return signal of satellite laser altimeter was presented. The mathematical and physical mode of typical landforms regarding different kinds of terrains was established. Based on computer simulations of return signal representing these modes of the landforms, an analysis of the variance of the return signal waveform was made. Using different signal detection methods, including the centroid method and the threshold method, ranging deviation caused by variance of the returned signal waveforms under different characteristics of target surface were provided. The conclusion of the analysis plays an important role in guaranteeing the ranging accuracy of satellite laser altimeter.

关 键 词： 星载激光测高仪 地形地物 回波信号 测距精度

领　　域： [电子电信]