1. A computer-implemented method for estimating impact of new operational conditions in a baseline air traffic scenario, comprising: for at least one flight in a baseline air traffic scenario, inferring an aircraft intent that fits corresponding flight track data, wherein the baseline air traffic scenario corresponds to a real air traffic scenario; receiving aircraft data relating to an aircraft operating the at least one flight in the baseline air traffic scenario; receiving weather data relating to weather and atmospheric conditions for the at least one flight in the baseline air traffic scenario; computing a reconstructed trajectory of the at least one flight in the baseline air traffic scenario, based on the aircraft data, the weather data and the inferred aircraft intent; for at least one flight in an alternative air traffic scenario, generating an aircraft intent that fits new operational conditions to be applied to a plurality of aircraft, wherein the new operational conditions comprise one or more new air traffic management operations and one or more new air traffic procedures, and wherein the generated aircraft intent conforms to the one or more new air traffic management operations and the one or more new air traffic procedures; computing a generated trajectory of the at least one flight in the alternative air traffic scenario using the generated aircraft intent; and computing trajectory-based analytics on each computed trajectory of the baseline and alternative air traffic scenarios using a set of metrics.