Abstract: The present invention relates to a construction method of a joint flight path to a mobile point including the step of acquiring a first state vector defining the position of the aircraft at the moment t0, acquiring a second state vector defining the position of the mobile point at each moment t after the moment t0. The method further includes determining, for each position of the mobile point, an elementary join flight path of this position of the mobile point from the position of the aircraft defined by the first state vector at the moment t0 with a capture time Tt corresponding to the time of flight of the aircraft on this flight path. The method also includes determining the flight path such that its capture time Tt is substantially equal to the time elapsed between the moment t associated with this trajectory and the moment t0.

Abstract: The present invention relates to a construction method of a joint flight path to a mobile point including the steps of acquiring a first state vector defining the position of the aircraft at the moment t0, acquiring a second state vector defining the position of the mobile point at each moment t after the moment t0, determining, for each position of the mobile point, an elementary join flight path of this position of the mobile point from the position of the aircraft defined by the first state vector at the moment t0 with a capture time Tt corresponding to the time of flight of the aircraft on this flight path, and determining and flight path such that its capture time Tt is substantially equal to the time elapsed between the moment t associated with this trajectory and the moment t0.

Abstract: A method for monitoring the flight trajectory of an aircraft comprises the steps reiterated in time consisting in receiving and comparing two trajectory objects, the trajectory objects being associated with two initially identical flight trajectories determined independently of each other over time; and, in case of difference between the two trajectory objects, determining a failed trajectory from the two flight trajectories by comparison with the last known state without fault, the last known state without fault corresponding to two identical trajectory objects. Developments describe the use of flight plan segments, of signatures, fault isolation simultaneously to a change of current leg, the use of levels of operational safety according to an RNP-AR procedure and the notification of the pilot of the trajectory determined as having failed. Software and system aspects are also described.

Abstract: A method for monitoring the flight trajectory of an aircraft comprises the steps reiterated in time consisting in receiving and comparing two trajectory objects, the trajectory objects being associated with two initially identical flight trajectories determined independently of each other over time; and, in case of difference between the two trajectory objects, determining a failed trajectory from the two flight trajectories by comparison with the last known state without fault, the last known state without fault corresponding to two identical trajectory objects. Developments describe the use of flight plan segments, of signatures, fault isolation simultaneously to a change of current leg, the use of levels of operational safety according to an RNP-AR procedure and the notification of the pilot of the trajectory determined as having failed. Software and system aspects are also described.

Abstract: A method for selecting radionavigation beacons using an onboard navigation system aboard an aircraft from a list of eligible beacons, includes a step for formulating a criterion for selecting a pair of beacons (BX, BY) from among beacons forming part of a list of eligible beacons, and the selection criterion is based on a search for a maximum duration of membership, for instants subsequent to the instant t1, for which the 2D terrestrial position of the aircraft belongs to the zones of employment of all the pairs of beacons achievable from among the eligible beacons, on the basis of a given predictive trajectory of the aircraft.

Abstract: The field of the invention is that of navigation systems serving aboard an aircraft, to determine the position of the aircraft on the basis of measurements of distance separating the aircraft from radionavigation beacons delivered by equipment of the DME type (Distance Measuring Equipment).