Air travel will become even more predictable in the future thanks to the work undertaken within the SESAR Programme to develop and validate initial 4D (i4D) trajectory management – connecting aircraft and ground systems to optimise the aircraft trajectory in three dimensions plus time[1]. Prepared by SESAR members (Airbus, Eurocontrol, Honeywell, Indra, NORACON[2] and Thales), [&]

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