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The GNSS satellite technique is applied for a designation of the true position of the aircraft vehicle in air transport. In case of air transport, the GNSS satellite technique is implemented within the ABAS, SBAS and GBAS augmentation systems. The aim of this paper is to present and describe the results of applying the GNSS satellite technique in the ABAS augmentation system in air transport. The research experiment was conducted on 1st June 2010 (01.06.2010) at late morning hours on the airfield in the town of Dęblin in the Lubelskie Voivodeship, in south-eastern Poland. Within the research experiment, nearby Dęblin airfield a flight test was executed using a Cessna 172 plane. During the flight test, the dual frequency Topcon HiperPro receiver was installed in the pilot’s cabin of the Cessna 172 aircraft. The Topcon HiperPro receiver collected a GPS code, phase and Doppler measurements in order to recover the true position of the aircraft. In this paper the authors present the results of positioning the Cessna 172 during the phase of landing based on the solution of the GPS satellite technique. The position of the aircraft was estimated by means of the Precise Point Positioning (PPP) method in GAPS software for un-difference GPS code and phase observations. The PPP method is applied in air navigation as a precise technique for recovery of position of aircrafts. Especially, designation of true position of the aircraft is very important at the phase of landing on the aerodrome. In this paper, the obtained accuracy for XYZ geocentric coordinates of the aircraft is better than 6 cm at the phase of landing. The precision of the aircraft coordinates from GAPS software was compared with the values from magicPPP and CSRS-PPP softwares. The dispersion of the difference of the aircraft coordinates between GAPS and CSRS-PPP softwares is between -0.5 m and +1.2 m. In addition, the dispersion of the difference of the aircraft coordinates between GAPS and magicPPP softwares is between -0.9 m and +1.8 m.

Application of GPS sensor for recovery of precise position of aircraft in air transport