基于ALOS PALSAR数据的卫星轨道拟合方法

Research on Satellite Orbit Fitting Method Based on ALOS PALSAR Data

以ALOS PALSAR数据为例,介绍了多项式轨道拟合法和轨道根数描述法两种卫星轨道描述方法。利用这两种方法确定了任意时刻的卫星轨道状态矢量,并结合数学软件Matlab进行计算,比较了两种方法的精度。实验结果表明,多项式轨道拟合法比轨道根数描述法的拟合精度更高,与原始数据的误差更小。卫星轨道拟合的目的在于提高雷达定位精度,对雷达数据校正及其相关研究具有重要意义。

Taking the ALOS PALSAR data for example,we introduced two methods of satellite orbit description,which were the polynomial orbit fitting method and the orbit number description method.And then,we used these two methods to determine the satellite orbital state vector at any time.At the same time,combining with Matlab,we compared the accuracy of these two methods.The experimental results show that the fitting accuracy of the polynomial orbit fitting method is better than that of the orbit number description method.The purpose of the satellite orbit fitting is to improve the accuracy of radar location,which is of great significance for the correction of radar data and its related research.