1. A remote trajectory management system (RTMS) for one or more aircraft comprising: an input specification module configured to manage information specifying flight-specific input data used to generate a trajectory; an aircraft model module comprising data that specifies a performance of at least one of an aircraft alone and an airframe and engines of the aircraft; a predict 4D trajectory module configured to receive the specified inputs from said input specification module, an aircraft performance model, and the aircraft model module and to generate a 4D trajectory for a predetermined flight; and a trajectory export module configured to transmit a predetermined subset of the predicted trajectory.