Improving Iranian Airport Navigation Scenarios by Using DGPS Techniques

This paper examines the role of ILS/DME ground navigation assistance devices in conducting airplanes on air routes. Due to installing limitations of these devices in various areas, it is mandatory to use GPS satellites. Since the probable transmission errors of satellite signals will reduce the accuracy of the navigation systems of the aircraft, the PBN-SBAS-GBAS-ABAS can be used to eliminate these errors and increase navigation accuracy. The aforementioned methods have many advantages in most advanced countries in the field of aviation, but due to the lack of preparation of the bases and infrastructure for the use of the above mentioned techniques in Iranian airports, DGPS method has been used to increase the accuracy of ILS/DME ground equipment. The main objective of this research is to simulate and study of the flight routes of the Mashhad international airport by using the ILS/DME navigation signals of DGPS method. The highlight of this research is plotting the curves of simulated signaling of ground-based devices such as deviation from the center line of the band, landing slope, and airplane distance to the airport by the above method and comparing it with GPS satellite signals.