如今,卫星信号可以连接飞机、轮船以及你口袋中的智能手机。你的手机可以通过蜂窝网信号、Wi-Fi网络以及卫星信号带你到任何你想去的地方。1全球定位系统如何工作30颗全球定位系统卫星环绕着地球,你的手机需要连接至少4颗卫星,来获得一个三维坐标。在不借助手机网络以及Wi-Fi的情况下,你的手机必须找到4颗卫星的正确位置,与此同时收到它们返回的信号,整个定位过程需要大概30s。通过4颗卫星返回的时间长短,就能确定你在地球上的 Today, satellite signals connect planes, ships and smartphones in your pocket. Your cell phone can take you anywhere you want via cellular, Wi-Fi and satellite signals. 1 How GPS Works 30 GPS satellites orbiting the earth, your cell phone needs to connect at least 4 satellites to get a 3-dimensional coordinate. Without the phone network and Wi-Fi, your phone must find the correct position for the 4 satellites while receiving the signals they return. The entire positioning process takes about 30 seconds. The time it takes for the four satellites to return will make sure you are on Earth