阐述了ICESAT卫星星载地学激光测高系统(GLAS)激光脚点定位原理,给出了具体的GLAS脚点定位算法以及数据处理流程,分析了激光测高的误差源,并总结了GLAS不同产品各项误差的量级以及误差的标准偏差。
The principle of the laser footprint geolocation by GLAS is expounded,the algorithm and the flow of data processing are presented. Error source of laser altimeter is analyzed and the magnitudes of every error of different GLAS products and the standard error(about 13 era) are summarized.