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提出了一种利用X射线脉冲星辐射到达时间(time of arrival,TOA)测量辅助双星定位系统进行轨道卫星迭代定轨方法,建立了双星可见观测弧段内基于双星距离和观测数据与脉冲星辐射TOA测量的组合量测方程,并应用于EKF(extend Kalman filter),针对几种量测值组合进行了仿真实验。结果表明,在双星覆盖轨道周期内利用脉冲星辅助一颗双星和辅助两颗双星迭代定轨精度分别达到了100m和50m水平,而在双星不可见弧段可利用脉冲星进行粗定轨,有效增强了全轨道周期内卫星定轨的自主性。
A satellite orbit satellite iteration orbit determination method based on X-ray pulsar radiation time-of-arrival (TOA) measurement is proposed. Based on binocular distance and observation data and pulsar radiation TOA measurement combination of measurement equations, and applied to the EKF (extend Kalman filter), for several combinations of measured values were simulated. The results show that the orbiting accuracy of a binary star and aided two-star iteration using pulsar in the double-satellite orbital period reaches 100m and 50m respectively, while the pulsar can be roughly orbitally fixed in the invisible arc of the binary star Enhance the orbit autonomy of orbit over the whole orbit.