Aircraft communications are established on a cellular system by having the transmission to {HEAD ~ aircraft} directed above {TAIL ~ ground level} so as not to interfere with ground cellular systems and having the transmissions from the aircraft at extreme low power levels so as not to interfere with transmissions from ground vehicles 
directed above
Aircraft communications are established on a cellular system by having the transmission to { HEAD ~ aircraft } directed above { TAIL ~ ground level } so as not to interfere with ground cellular systems and having the transmissions from the aircraft at extreme low power levels so as not to interfere with transmissions from ground vehicles
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