轨道动力学修正模型及其在北斗短时星历预测中的应用

发布时间：2019-01-04 22:06

【摘要】：对于具有低功耗和小型化需求的便携式卫星导航终端设备,准确的星历预测更有利于其快速定位,实现节能与器件小型化.在传统卫星轨道动力学模型预测方法的基础上,提出了含太阳、地球和月球的万有引力以及太阳光压之外的其他摄动力修正项的修正模型.利用导航卫星轨道位置的周期性特性,在轨道平面下对该修正项进行数值建模,通过北斗导航卫星的历史广播星历数据获得修正项参数的短时拟合值,进而对北斗导航卫星进行星历预测.最后,通过北斗导航卫星的实际星历数据验证了该修正模型对提高短时星历预测精度的可行性.
[Abstract]:For portable satellite navigation terminal equipment with low power consumption and miniaturization, accurate ephemeris prediction is more conducive to its rapid positioning, energy saving and device miniaturization. Based on the traditional prediction method of satellite orbit dynamics model, a modified model is proposed which includes the gravity of the sun, the earth and the moon, as well as other perturbation correction terms other than the solar pressure. Based on the periodic characteristic of navigation satellite's orbit position, the correction term is modeled numerically under the orbit plane, and the short time fitting value of the correction term parameter is obtained by using the historical broadcast ephemeris data of Beidou navigation satellite. Then the ephemeris prediction of Beidou navigation satellite is carried out. Finally, the feasibility of the modified model to improve the prediction accuracy of short-time ephemeris is verified by the actual ephemeris data of Beidou navigation satellite.
【作者单位】：厦门大学信息科学与技术学院;
【基金】：中国第二代卫星导航系统重大专项(GFZX031010708)
【分类号】：P228.4

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