天地一体自主导航系统卫星广播星历参数拟合

摘要

To solve the problem that the ephemeris parameters fitting arithmetic of operational satellite navigations aren’t applicable for the integrated autonomous navigation system of space and land in the future,especially for the geostationary or-bits and the Lagrange libration point orbits,the Chebyshev polynomial fitting algorithm is proposed to unify the multi-types satellites ephemeris parameters fitting.The fitting results,based on the operational COMPASS system satellite precise orbits and stimulated earth-moon system Lagrange libration point orbits,demonstrate that the Chebyshev polynomial is stable and reliable,flexi-ble and controllable,with less calculation,and it is adapted to all-type satellite autonomous fitting onboard as well.%本文针对现役卫星导航系统广播星历拟合及用户计算算法不能适用未来天地一体自主卫星导航系统的问题，提出利用切比雪夫多项式统一拟合多类型卫星轨道广播星历。利用 BDS 实际精密轨道数据和仿真拉格朗日平动点轨道数据试验表明，切比雪夫多项式星历拟合算法稳定可靠，灵活可控，计算量少，适用于所有类型导航卫星星载自主拟合。