gps/gprs 技术文档,可以参考实现的说明原理,实现即时通信技术-gps/gprs technical documentation, you can reference implementation description of the principle of instant communication technology
这是GPS接收机仿真的程序, GPS数据由给定文件来模拟,对于GPS爱好者很实用。-This is the GPS receiver simulation procedures, GPS data given by the paper to simulate, for GPS enthusiasts practical.