双星系统实时导航定位仿真

通过对双星系统的星座、工作过程以及定位误差的模拟,构建了一个用于评估双星定位系统对在其覆盖范围内任意时刻任意位置运动载体所提供的导航定位结果的仿真分析平台.在仿真系统初始化时,用户可以自由设定双星系统的星座、中心站位置、自定义坐标系、误差等级、仿真频率以及运动载体的姿态和航迹.该仿真系统为用户提供了运动载体分别在地理坐标系、WGS84坐标系、当地地理坐标系、用户自定义坐标系中的位置、速度、误差、几何精度衰减因子(GDOP)以及载体航程等仿真结果,通过对结果的分析可以评价出双星系统对于运动载体的定位效果.

Real Time Simulation of Double-star Positioning System

By researching the constellation and the positioning process of the Double-star Positioning System,this article deduces a method for constructing a software platform to simulate the Double-star Positioning System and to evaluate the system's positioning performance on mobile vehicles.In initialization phase,users can set many parameters of the software freely,such as the location of satellites and center station,the customer coordinate,the error scale,the output frequency,and the attitude and track of vehicles.The software's output of the simulating results,such as position,velocity,positioning error,and the Geography Dilution of Precision(GDOP),of mobile vehicles within the coverage of the Double Star Positioning System in geographic coordinate,WGS84 coordinate,local geographic coordinate,and customer coordinate can help us to analyze and evaluate the positioning performances of the Double Star Positioning System.