摘要
针对中低轨卫星对同步轨道卫星定位时存在的可观测时间短等限制,结合同步轨道卫星轨道的特点,利用测角信息计算出距离信息。将距离信息与测角信息一起建立新的测量方程,进而提出一种新的基于J2000.0惯性系的单颗中低轨卫星对同步轨道卫星的扩展卡尔曼仅测角被动跟踪定轨方法,并对测量方程的变量和坐标转换给出了明确定义。仿真结果表明,该算法实现了单颗中低轨卫星对同步轨道卫星的仅测角被动跟踪定轨,若已获得被测星的先验知识,该算法收敛时间优于未引入距离信息的常规算法。
A novel algorithm for LEO-satellite-to-GEO-satellite passive orbit determination and tracking with bearing-only measurements is proposed in this paper.The algorithm utilizes prior information of GEO orbit to conquer shortness of access durations.The distance between the LEO and GEO satellites is calculated.Based on the distance information calculated and angles measured,an extended Kalman filter for orbit determination and tracking under J2000.0 coordinate is proposed.The results of simulation indicate that this method realizes passive orbit determination and tracking for a GEO-satellite using a single LEO-satellite.Given the prior information of the target orbit,this method will present a faster convergence than ordinary bearing-only method.
出处
《电子对抗》
2011年第3期6-10,共5页
Electronic Warfare
关键词
同步轨道卫星定轨
跟踪滤波
无源定位
单星仅测角
GEO-satellite orbit determination
extended Kalman filtering
passive location
single observer bearing-only
