严格回归轨道的管道导航方法研究

分析了作为参考轨道的严格回归轨道与卫星在轨运行状态的相对运动关系，提出近地遥感卫星的管道导航方法。由于参考轨道的设计只考虑高精度的地球非球形摄动，与在轨卫星的动力学环境存在差别，这导致两者之间存在切航向漂移。基于高精度的轨道动力学模型和位置确定方法，设计了卫星与参考轨道采样点的沿航向对齐算法，从而获取了卫星相对参考轨道采样点的相位时间偏差和卫星在参考轨道编队坐标系切航向平面内的相对运动轨迹，进而引入椭圆的“最小二乘适配法”获取相对运动轨迹的特征量。所研究的管道导航方法可应用于基于GNSS测量数据的卫星自主轨迹保持。

Study on the tube navigation of strictly regressive orbit

The relative motion features between satellite and strictly regressive reference orbit were investigated to build a tube navigation method of remote sensing satellite. Since the reference orbit was designed only with the high precision non spherical perturbation, it had a different dynamic environment with the satellite in space, leading an excursion in along track direction. An along track aligning algorithm was introduced to get rid of the excursion in along track direction based on high precision orbit dynamic model and position sampling method, by which the phase time excursion and relative motion trajectory were determined. The direct least squares fitting method was introduced to achieve the features of relative motion trajectory. The study on tube navigation can be applied to autonomous ground track keeping of satellites with GNSS measurements.