基于BDS/GPS观测的北斗硬件延迟解算

BDS Differential Code Bias Estimating Based on BDS/GPS Observations

研究了联合BDS/GPS观测数据基于球冠谐函数的中国区域电离层建模,并精确估计了北斗卫星和接收机DCB。联合解算得到的GPS卫星DCB相对CODE精度优于0.2 ns,GPS接收机DCB相对CODE精度优于1 ns;联合解算得到的中国区域上空VTEC相对CODE事后产品的精度可达2~3 TECU。

The regional ionosphere modelling is reseached to esitimate the BDS differential code bias based on the spherical cap harmonic methods in this paper. Using GPS/BDS combined obervations,the estimated GPS differential code bias and ionospheric parameters are more accurate,in which the GPS satellite differential code bias is better than 0.2 ns and GPS receiver differential code bias is better than 1 ns compared with the CODE post-processing values. Meanwhile,compared with that of the estimated ionospheric models with the CODE post-processing model,estimated VTEC over China continent reaches about 2 ~ 3 TECU.