{TAIL ~ Aircraft communications} are established on a cellular system by having the transmission to aircraft directed above {HEAD ~ 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 
{ TAIL ~ Aircraft communications } are established on a cellular system by having the transmission to aircraft directed above { HEAD ~ 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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