A method of identifying operational modes experienced by a user during a jump from an aircraft may comprise estimating a user altitude and a user descent rate, based on a set of navigation state data vectors. The method may further comprise determining that the user is ready to transition from a flight mode to a descent mode when the user altitude is above a jump altitude threshold, and a variation of the user altitude is below a predetermined altitude variation threshold. After determining that the user is ready to transition from the flight mode to the descent mode, the method further comprises determining that the user has transitioned from a flight mode to a descent mode when a user ground speed is below a ground speed threshold, and one or both of (i) a GNSS position error estimate, and (ii) the user descent rate estimate, indicates a jump signature.
Automatic mode control for a parachutist navigation system
2019-08-13
Patent
Elektronische Ressource
Englisch
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