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八十年代末期,一种科学幻想般的寻址设备将在汽车中出现。这种寻址器要有通讯卫星、激光视盘、触感视屏和计算机的配合,才能完成寻址任务。每个卫星都发送出特有的无线电信号,设在汽车中的接收机最少能收到4个卫星发出的电波,这就提供了4维的参量,根据这些参量即可确定汽车所在位置的经度、纬度、海拔高度和在该位置
In the late 1980s, a sci-fi addressing device would appear in cars. This kind of address device must have communication satellites, laser disc, touch screen and computer cooperation, in order to complete the addressing task. Each satellite sends a unique radio signal, the receiver in the car can receive at least 4 satellites radio waves, which provides a 4-dimensional parameters, based on these parameters to determine the longitude of the car’s location, Latitude, altitude and at this location