| 摘要 |
The method involves calculating (S10,S12) specific integrity risk at an alarm sensor by assuming that specific satellite is faulty. Specific position solution of signals received from satellites is determined (S14). Other position solution of received signals except from specific satellite is determined (S16). A reduced alarm sensor is formed (S20) by subtracting difference between position solutions from alarm sensor. Other integrity risk at reduced alarm sensor is calculated. The integrity risk at alarm sensor is determined (S24,S26,S28) by using minimum integrity risk. Independent claims are included for the following: (1) an alarm sensor integrity risk determining program stored in a computer readable medium; (2) a device for determining integrity risk of alarm sensor; and (3) a device for determining position based on signals from the satellite navigation system. |
