星载激光高度计几何定位误差传播分析

摘要

As a way of acquiring elevation with high accuracy, space-borne laser altimeter improves the capability of 3-dimensional cartography of satellite optical remote sensing imagery. However, the plane accu-racy of space-borne laser altimeter is not so high as its elevation accuracy. Accordingly, the error sources and their influences on space-borne laser altimeter geometric positioning are studied in this paper. The geometric positioning of space-borne laser altimeter is first modeled, then error propagation of the model is studied, and the main error sources of space-borne laser altimeter geometric positioning are obtained. Finally the influences of each error sources on space-borne laser altimeter geometric positioning are analysed, which can be as the references for space-borne laser altimeter designing and application.%星载激光高度计能够获取高精度的地面高程信息，可作为卫星光学遥感影像三维测图的补充。星载激光高度计的高程测量精度很高，但是平面精度较低。为了能够更有效的利用星载激光测高数据，需要研究星载激光高度计几何定位的误差源及其对定位精度的影响。文章从星载激光高度计几何定位模型出发，推导了星载激光高度计定位误差传播模型，得到影响星载激光高度计测高数据定位精度的主要误差源，并分析了各误差源对定位精度的影响，可以为星载激光高度计的设计和应用提供一定参考。