基于北斗导航系统的我国地基增强格网模型研究

基于全国均匀分布的210个北斗地基增强基准站观测数据,提出基于非差非组合精密单点方法获取空间相关的延迟误差及残差,研究利用反距离加权法、克里金插值法以及球谐函数法建立了中国区域的三种地基增强格网模型。使用单频伪距单点定位方法对中国区域的北斗地基增强格网模型定位精度进行了评估,验证结果表明本文建立的格网模型的定位精度达到米级,可满足大众用户的需求。

The Study on Ground-based Augmentation Grid Model Based on BEIDOU Navigation System

Based on the 210 national BDS CORS stations distributed in China continent, a non -difference non-combination precise point positioning method had been proposed out to get the delay error and residual error of spatial correlation. Three kinds of ground-based augmentation grid model had been establishment in China area using the inverse distance weighted method, Kriging interpolation method and spherical harmonic method. The positon accuracy of different grid model had been evaluated using single frequency pseudo range point positioning method, which shows that the positioning accuracy of grid model reach meter level satisfied the demand of public users.