说明：  GPS定位采用UKF滤波方式。包括调用的数据dat文件（选用卫星数据和机动目标运行轨迹数据）和调用的sigma点生成子程序。运行可观察定位误差（位置、速度和加速度）
(GPS positioning using UKF filtering method. The data include call dat file (optional operation of satellite data and maneuvering target trajectory data) and the sigma point generation subroutine calls. Run positioning errors can be observed (position, velocity and acceleration))