Abstract
Flight trajectory of a passenger aircraft is critical for the research and development of future air traffic control system. Generally, though, flight data are closed to the public view. In this paper a simple method is introduced to estimate flight trajectories using a commercial GPS receiver at a cabin of an in-flight airplane and numerical weather data. Barometric pressure altitude and Mach number were evaluated at the study. Results prove that airplanes follow almost exactly the predetermined airway and cruising altitude. Maximum deviation was recorded only at a magnitude of several dozen meters.
