实现无线电导航的原理，基于三边测量定位对导航和GPS（全球定位系统）的实现。同时实现了，GPS广播星历参数算法，电离层误差、对流层误差、卫星等仿真-Implement the principle of radio navigation, positioning for navigation based on trilateration and GPS (Global Positioning System) implementation. While achieving, GPS broadcas