摘要
导航星座的自主定轨是提高其生存能力的重要方面,利用星间测量信息可以实现星座的自主定轨。提出了一种利用改进的Kalman滤波融合动力学信息和星间测距信息,并实时修正积分初值的自主定轨算法。采用IGS精密星历仿真星间测量值,运算结果表明该算法能获得较高的定轨精度。
Autonomous orbit determination of navigation constellation based on cross-link range can improve greatly the viability of constellation. An algorithm of autonomous orbit determination is presented in this paper. This algorithm fuses dynamics data and cross-link range by improved Kalman filter, and real-time modifies integral parameters. Cross-link range is simulated based on IGS precise ephemeredes. The results show that this algorithm is feasible to precise orbit determination. At last, influence of measurement accuracy on orbit determination accuracy is discussed.
出处
《全球定位系统》
2008年第2期9-12,共4页
Gnss World of China
关键词
导航星座
自主定轨
星间测量
KALMAN滤波
Navigation constellation
autonomous orbit determination
cross-link range
Kalman filter
