【摘要】 激光测高因具有方向性好、测距精度高等特点,在深空探测和地球科学领域中体现了巨大的应用潜力,将星载激光测高技术应用于高分辨率测绘卫星,辅助航天摄影测量以提高精度是一种新颖的设想。而研究星载激光测高系统误差对测量精度的影响,以及相应的误差消除方法,是决定该项技术能否真正提高测量精度的可行性基础。本文以全球首颗激光测高卫星ICESat及其搭载的地学激光测高系统GLAS为例,基于星载激光测高的定位原理分析各项系统误差对测高精度的影响,并在此基础上介绍星载激光测高的系统检校方法,以期对发展我国的星载激光测高系统提供一定的参考。更多还原

【Abstract】 Due to the good direction and high range precision,an enormous potential of laser altimetry is showed in deep space exploration and earth science. It is a novel idea to apply the spaceborne laser altimetry to high-resolution mapping satellite to improve the accuracy of aerospace photographic. The study of the impact of spaceborne laser altimetry system error and the corresponding error elimination method is the foundation to determine if this technology can truly improve the measurement accuracy or not. In this paper,the world’s first laser altimeter satellite ICESat and its’ sole science instrument geoscience laser altimeter system( GLAS) are taking as an example. The influence of systematic error is analyzed based on positioning principle of spaceborne laser altimetry. The calibration and validation methods are also introduced to provide reference to the development of our own spaceborne laser altimetry system.更多还原