INTEGRITY MONITORING METHOD AND APPARATUS FOR GPS AND DGPS RECEIVERS

摘要

A fail safe GPS system for an aircraft moving along a desired trajectory within vertical and horizontal limits using first and second redundant GPS receivers a first of which is connected to the avionics equipment of the aircraft and to an alarm and the second of which is connected only to the alarm so that if a malfunction in the flight management system occurs both GPS's will cause the alarm and if a malfunction in the first GPS system occurs, so that the aircraft exceeds the vertical or horizontal limits, the second GPS system will cause the alarm.