【摘要】 针对BDS系统动态相对定位较少顾及GEO轨道特性的问题，本文分析了GEO卫星空间信号质量和观测值质量，顾及GEO轨道特性，基于站间单差残差和降权因子改善随机模型；并验证分析了剔除全部GEO和部分GEO情况下的定位性能。试验结果表明，顾及GEO轨道特性剔除部分GEO卫星并对随机模型进行改善，能够保证观测卫星数量，提升了模糊度固定率和动态相对定位精度。更多还原

【Abstract】 Considering the issue that dynamic relative positioning of the BDS system rarely takes GEO orbital characteristics into account, this paper analyzes the spatial signal quality and observation value quality of GEO satellites. By considering GEO orbital characteristics, the stochastic model is improved based on inter-station single-difference residuals and a downweighting factor. The positioning performance is verified and analyzed under the conditions of excluding all GEO satellites and excluding some GEO satellites. The experimental results show that considering the GEO orbital characteristics, excluding some GEO satellites, and improving the stochastic model can ensure the number of observed satellites, enhance the ambiguity resolution rate, and improve the accuracy of dynamic relative positioning.更多还原