BDS+GPS相对定位精度因子分析

摘要

提出了GNSS相对定位大气精度因子,即对流层精度因子TrDOP和电离层精度因子IDOP,能够更全面地评估中长距离相对定位参数估计精度.首次从精度因子的角度论证了BDS与GPS融合对测量时间效率的影响.BDS/GPS系统融合后,模糊度精度因子ADOP、相对几何位置精度因子RGDOP、TrDOP值减小,达到与延长观测时间一致的效果.通过TrDOP和IDOP值分析,表明BDS/GPS系统融合有利于对流层和对流层参数估计.%This paper defines new atmosphere DOP styles that are TrDOP and IDOP in GNSS relative positioning.From DOP standpoint, it is firstly demonstrated that the efficiency of BDS/GPS fusion precise relative positioning are improved.With the joining of BDS, the values of ADOP, RGDOP and TrDOP decrease efficiently that can be achieved by increasing observing sessions.Moreover, by analyzing TrDOP and IDOP values, it indicates that BDS/GPS fusion is favorable to estimate the tropospheric parameter and has a small impact on estimating ionospheric parameters.