空中交通管制，一个由地面设备和机载设备组成的系统。用来对飞机进行识别，跟踪和定位。
Air TRAFFIC CONTROL, a system comprised of ground and airborne components used to identify, track and locate aircraft.
在研究卫星通讯地面站的动中通设备时，要求天线系统在车载机上能很好地跟踪指定的卫星。
At studying the "Connection in moving" equipments, of the satellite communication earth station, we request that the antenna system carried on the car can follow the appointed satellite very well.
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