Monitoring Aircraft Position Using EGNOS Data for the SBAS APV Approach to the Landing Procedure

The aim of this paper is to present the problem of the implementation of the EGNOS (European Geostationary Navigation Overlay Service) data for the processing of aircraft position determination. The main aim of the research is to develop a new computational strategy which might improve the performance of the EGNOS system in aviation, based on navigation solutions of an aircraft position, using several GNSS (Global Navigation Satellite System) onboard receivers. The results of an experimental test conducted by the Cessna 172 at EPDE (European Poland Deblin) (ICAO (International Civil Aviation Organization) code, N51°33.07’/E21°53.52’) aerodrome in Dęblin are presented and discussed in this paper. Two GNSS navigation receivers with the EGNOS positioning function for monitoring changes in the parameters of the aircraft position in real time during the landing phase were installed onboard a Cessna 172. Based on obtained research findings, it was discovered that the positioning accuracy was not higher than 2.1 m, and the integrity of positioning did not exceed 19 m. Moreover, the availability parameter was found to equal 1 (or 100%); also, no intervals in the continuity of the operation of the EGNOS system were recorded. In the paper, the results of the air test from Dęblin were compared with the parameters of positioning quality from the air test conducted in Chełm (ICAO code: EPCD, N51°04’57.8” E23°26’15”). In the air test in Chełm, the obtained parameters of EGNOS quality positioning were: better than 4.9 m for accuracy, less than 35.5 m for integrity, 100% for availability, and no breaks in continuity. Based on the results of the air tests in Dęblin and Chełm, it was concluded that the parameters of the EGNOS positioning quality in aviation for the SBAS (Satellite Based Augmentation System) APV (Approach to Vertical guidance) procedure were satisfied in accordance with the ICAO (International Civil Aviation Organization) requirements. The presented research method can be utilized in the SBAS APV landing procedure in Polish aviation. In this paper, the results of PDOP (Position Dilution of Precision) are presented and compared to the two air tests in Dęblin and Chełm. The maximum results of PDOP amounted to 1.4 in the air test in Dęblin, whereas they equaled 4.0 in the air test in Chełm. The paper also shows how the EGNOS system improved the aircraft position in relation to the only GPS solution. In this context, the EGNOS system improved the aircraft position from about 78% to 95% for each ellipsoidal coordinate axis.

[1]  Henryk Jafernik,et al.  Airborne Measurement System During Validation of Egnos/Gnss Essential Parameters in Landing , 2014 .

[3]  J. Azinheira,et al.  TO THE OPERATIONAL EVALUATION OF EGNOS AS AN AERONAUTICAL NAVIGATION SYSTEM , 2006 .

[4]  Adam Ciecko,et al.  Study of EGNOS safety of life service during the period of solar maximum activity , 2012 .

[5]  Adam Ciecko.  EGNOS PERFORMANCE MONITORING AT NEWLY ESTABLISHED GNSS STATION IN POLISH AIR FORCE ACADEMY , 2016 .

[6]  Adam Ciecko,et al.  Examination of Autonomous GPS and GPS/EGNOS Integrity and Accuracy for Aeronautical Applications , 2017 .

[7]  Mirko Reguzzoni,et al.  Accuracy of Flight Altitude Measured with Low-Cost GNSS, Radar and Barometer Sensors: Implications for Airborne Radiometric Surveys , 2017, Sensors.

[8]  Andrzej Felski,et al.  Accuracy and Availability of Egnos - Results of Observations , 2011 .

[9]  L. Azoulai,et al.  Experimental Flight Tests with EGNOS on A380 to Support RNAV LPV Operations , 2009 .

[10]  H. Secretan,et al.  EGNOS System Test Bed Evolution and Utilisation , 2001 .

[11]  Henryk Jafernik,et al.  Air Navigation in Eastern Poland based on EGNOS , 2013 .

[12]  Lin Zhao,et al.  Real-Time Single Frequency Precise Point Positioning Using SBAS Corrections , 2016, Sensors.

[13]  Janusz Ćwiklak,et al.  Examination of EGNOS Safety-of-Live Service in Eastern Slovakia , 2015 .

[14]  Adam Ciecko,et al.  Autonomous and EGNOS Positioning Accuracy Determination of Cessna Aircraft on the Edge of EGNOS Coverage , 2008 .

[15]  A. Fellner,et al.  Pre-Flight Validation RNAV GNSS Approach Procedures for EPKT in 'Egnos Apv Mielec Project' , 2016 .

[16]  C. Tiberius,et al.  LANDING: Added assistance to pilots on small aircraft provided by EGNOS , 2008, 2008 IEEE/ION Position, Location and Navigation Symposium.

[17]  A. Fellner,et al.  The implementation of the EGNOS system to APV , 2008 .

[18]  Mieczysław Bakuła,et al.  Study of EGNOS accuracy and integrity in eastern Poland , 2016 .

[19]  Wojciech Z. Kaleta.  EGNOS Based APV Procedures Development Possibilities In The South-Eastern Part Of Poland , 2014 .

[20]  A. Fellner,et al.  Preliminary results of DGPS/DGLONASS aircraft positioning in flight approaches and landings , 1999 .

[21]  Marek Grzegorzewski,et al.  Navigating an Aircraft by Means of Position Potential in Three Dementional Space20 , 2005 .

[22]  P. Rosenthal,et al.  EGNOS Flight Trials, Evaluation of EGNOS Performance and Prospects , 2006 .

[24]  Adam Ciecko.  Analysis of the EGNOS quality parameters during high ionosphere activity , 2019 .