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The International Mobile Telecommunications IMT2000 terrestrial standards are investigated as a potential alternative for communications to aircraft mobile users in airport and terminal domains. Specifically, its application to air traffic management (ATM) communication needs is considered. The various specifications of the IMT2000 standards are outlined. It is shown via a system research analyses that it is possible to support most air traffic communication needs via the use of 3G technologies. This technology can compliment existing or future digital aeronautical communications technologies such as VHF digital links mode 2, 3, 4 (VDL2, VDL3, VDL4).