接收站位形对甚低频源定位精度的影响

考虑到地球曲率的影响,文中使用基于球面模型的远距离多站时差定位算法来具体研究VLF源定位的精度.针对四接收站下的方型布站和星型布站两类典型布站几何,使用蒙特卡洛随机试验的仿真方法计算了探测区域内接收系统对VLF源定位结果的均方根误差,分析了布站几何、基线长度和主站选择三类因素对定位精度的影响.结果表明:提高基线长度可以...

Influences of receiving station configuration on positioning accuracy of VLF emission sources

Considering the Earth’s curvature effect, the positioning accuracy of very low frequency(VLF)emission sources is studied by using a long-distance multi-station time difference positioning algorithm based on a spherical model. By the Monte-Carlo simulation method, the spatial distribution of the root mean square error(RMSE)of positioning results is calculated for the two typical station geometries of the square-and star-shaped stations in the four-stations receiving system. The influence of three factors of station geometry, baseline length, and master station selection on positioning accuracy is analyzed. The results show that increasing the baseline length can effectively improve the positioning accuracy, but the improvement effect decreases as the baseline increases. Compared with the square-shaped stations, the star-shaped geometry has more advantages. The overall positioning error in the detection area is lower without a directional distribution, so it is more suitable for blind source positioning. For the star-shaped configuration, the positioning accuracy of the master station at the center of the triangle is better than that at other positions. The research results have a significant reference value for the actual receiving site setting of the long-distance VLF source positioning system.