Notice of Retraction<BR>Assessment model of collision risk based on three-dimensional coordinate system
This paper presents a new assessment model for the collision risk of aircraft on intersecting tracks. Focusing on route flight safety, the model is based on the well-established Reich model. Position errors and collision risk of aircraft under communication, navigation, surveillance (CNS) performances were studied. With considering communication, navigation and surveillance errors, Reich model was modified and a computation formula of lateral overlap probability on intersecting tracks was deduced. Hereby, the assessment model of collision risk on intersecting tracks was established. At last, a practical example of assessment of collision risk on intersecting tracks was given. Computation result shows that the flight environment with CNS performance is safe, so the model is feasible.