摘要
针对地球临边观测卫星的姿态角计算问题,给出一种应用STK软件进行仿真的分析方法。利用STK软件的连接接口联立STK软件,创建仿真场景;在二体模型下,求得临边观测卫星姿态角的解析解,并作为下一步精确迭代求解的初值;在WGS84地球模型下,调用STK软件中的高精度轨道外推模型(HPOP),并结合推导的迭代公式,求得卫星姿态的高精度数值解。以20km和100km的临边观测为例,仿真计算姿态角,并将计算结果与二体模型方法的进行对比。结果表明,文章提出的方法可有效解决地球临边观测卫星的姿态角计算问题,且具有收敛迅速和计算精度高的优势。
A simulation analysis method using STK is presented to calculate the attitude of a satellite for limb observation.The STK simulation scenario is created by connecting STK software.The two-body model is utilized to perform an analytical solution,which provides a reasonable initial guess for subsequent accurate iterative calculation.The WGS84 model is used to improve the initial solution by calling the HPOP（high precision orbit propagator）and the iterative formula.Taking the 20 km and 100 km limb observation for example,both the proposed method and the two-body method are employed to calculate the attitude angle.And the results show that the method proposed in this paper has faster convergence and higher accuracy.
出处
《航天器工程》
北大核心
2015年第4期38-43,共6页
Spacecraft Engineering
基金
上海市科委扬帆计划(14YF1413600)
关键词
地球临边观测
卫星姿态角
高精度计算
earth limb observation
satellite attitude angle
high precision calculation
