Patent ID: 9429654
Filing Date: 2016-08-30
CPC Classification: G01S

Claim Text:
1. A method for determining an integrity risk at an alert limit of a position solution determined by processing signals received from satellites of a satellite navigation system, the method comprising: calculating a first integrity risk at the alert limit assuming that one satellite of the satellites is faulty; determining a first position solution is determined with signals received from all of the satellites; determining a second position solution with signals received from all of the satellites except for a signal received from the assumed faulty satellite; determining a difference between the first and the second position solution; creating a reduced alert limit by subtracting the determined difference from the alert limit; calculating a second integrity risk at the reduced alert limit with the signals received from all satellites except the signal received from the assumed faulty satellite; determining the integrity risk at the alert limit using a lower of the first and second integrity risks; and outputting the determined integrity risk by one of a display unit, a data output interface and an audio output unit.