GE O卫星东西机动监视与移动窗口轨迹拟合

摘要

The true firing period of station-keeping maneuver,if detected rapidly and reliably, can reduce effectively the unavailable time of GEO satellites among the navigation constellation. Based on the movement characteristics of the sub-satellite point (SSP)of GEOs,a 7-parameter fitting set was proposed including GEO elements and a mean drift acceleration of longitude.The fitting feasibility was validated for 10 minutes̓SSP motion of GEOs.And then both the fitted semi-major series and RMS series of fit-predicting range residuals were utilized to jointly monitor the firing window in real time according to the principle and strategy of east-west maneuver. Using C-band range tracking data with on-board transponder of 1d, the moving-window kinematic fitting with a 20-min maneuver involved was applied.The results show that the proposed maneuver monitoring method is valid and sensible.%快速获得可靠的实际机动点火时段，可以有效缩短GEO卫星在整个导航星座中的不可用时段。针对GEO卫星的星下点运动特性，本文提出同步根数加东西漂移加速度的运动参数集，验证了七参数模型对10 min 窗口轨迹拟合的可行性。基于东西定点机动的工作原理，提出联合半长轴拟合窗口序列和测站测距拟合-预报残差均方根窗口序列的机动监视方法。利用C波段转发测距资料，对某 GEO 卫星包含变轨弧段在内的1d数据进行开窗运动学拟合分析，验证了机动检测方法的有效性和灵敏性。