GPS接收机的简单仿真，包含卫星天空视图、基本观测量、精度评定因子-Easy simulation of GPS receiver, including the satellite sky view, the basic concept of measurement, accuracy evaluation factor

用于北斗GPS授时接 收机的数据解算。并可显示卫星天空视图。-Compass GPS timing receiver for data solver. Satellite sky view can be displayed.