CAJ | 학술논문

针对斜坡地形、台阶地形和植被地貌、分界地貌建立了4种基本模型，研究了不同的地表空间起伏和反射率分布对回波信号时空分布特性的影响，并采用蒙特卡罗方法仿真了4种模型下Gei ger探测模式星载激光雷达的高程测量精度，发现：地形起伏主要影响回波信号的时间分布特性，统计条件下可以消除测量误差；回波信号空间分布特性变化主要由地貌（反射率）的变化引起，误差较小可以忽略。研究结果表明：激光三维测绘卫星对垂直陡变地形（如城市建筑）、斜坡地形（如山坡）、分界地貌（如水陆分界）和折射率起伏地貌（如植被地貌等）具有良好的探测能力。
침대사파지형、태계지형화식피지모、분계지모건립료4충기본모형，연구료불동적지표공간기복화반사솔분포대회파신호시공분포특성적영향，병채용몽특잡라방법방진료4충모형하Gei ger탐측모식성재격광뢰체적고정측량정도，발현：지형기복주요영향회파신호적시간분포특성，통계조건하가이소제측량오차；회파신호공간분포특성변화주요유지모（반사솔）적변화인기，오차교소가이홀략。연구결과표명：격광삼유측회위성대수직두변지형（여성시건축）、사파지형（여산파）、분계지모（여수륙분계）화절사솔기복지모（여식피지모등）구유량호적탐측능력。
Four basic models have been established in view of the slope terrain ,the step and platform terrain ,the vegetation terrain as well as the dividing terrain and research is focused on exploring the effect of irregular topography and distribution of reflectance on the spatial and temporal distribution of echo signal .Additionally ,Monte‐Carlo Method has been employed to simul ate measuring accuracy of LiDAR Geiger mode detection under the four models .Through the numerical simul ation ,it is found that irregul ar topography mainly affects the time distribution of echo pulse and error can be eliminated under the statistics condition;the change of the distribution of echo signal is mainly caused by the vari ation of the l andscape ,so small error can be ignored .Such results prove that 3D Laser Surveying Satellite is advanta‐geous to the detection over different landforms and physiognomy ,such as architectures ,hills ,boundary zones and vegetative cover .