卫星入轨段多源测轨数据融合定轨的加权方法

针对卫星发射入轨段遥外测多种不等精度、不同类型的测轨数据放在一起定轨时的合理加权问题，采用基于微分轨道改进基本原理，推导得到适用于不同类测轨数据联合定轨的动力学条件方程，提出了依据不同测量数据均方差确定该测量元素对应的动力学条件方程权重的方法。仿真验算和实战数据检验表明，该方法充分发挥了分布于各种测轨数据中的高精度测元的作用，融合后的定轨精度得到显著提高。

Weighting method of orbit determination for multiple orbit measurement data fusion in satellite injection phase

In injection of satellite launch task,the precision and type of the obtained multiple orbit measurement data such as telemetry data,exterior measuerment data,on-board GPS/GNSS real-time position data are different. To realize rationally weighting in orbit determination using those multiple orbit measurement data together,according to the theory of differential orbit improvement,dynamics equations are deduced for the different types of data,and the weighting method is introduced to fuse the multi-source data with different precision and form according to the root mean square(RMS) of condition function associated to different data. The results of simulations and real data processing show that the method makes full use of the high precise measurement data of different orbit measurement and the orbit determination precision is improved obviously.