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; computing a reconstructed trajectory of the at least one flight in the baseline air traffic scenario using the inferred aircraft intent; for at least one flight in an alternative air traffic scenario, generating an aircraft intent that fits new operational conditions; computing a generated trajectory of the at least one flight in the alternative air traffic scenario using the generated aircraft intent; computing trajectory-based analytics on each computed trajectory of the baseline and alternative air traffic scenarios using a set of metrics.