对,美国的GPS 只有接收,但中共北斗早期有发射,美可监测己往气球通讯方式

来源: 于 2023-02-23 03:41:23 [旧帖] [给我悄悄话] 本文已被阅读：次
 
The P code is referred to as the Y code if encrypted. Y code is actually the combination of the P code and a W encryption code and requires a DoD authorized receiver to use it.