1. Accuracy Analysis of the EGNOS System During Mobile Testing Douglas Aguilar Leszek Jaworski Marcin Kolodziejczak Warsaw, Poland

2. Mobile GPS Laboratory

3. Test Route - 10 km

4. Test Objectives • Objectives • Check accuracy corrections of the EGNOS (PRN 126) system against GPS signals • Compare integrity and availability of GPS and EGNOS (PRN 126) signals

5. Test Dates - 2007

6. Septentrio X-Coordinate Deviation 15 Deg. Mask – 4 April

7. Septentrio Y-Coordinate Deviation 15 Deg. Mask – 4 April

8. Septentrio Height Deviation 15 Deg. Mask – 4 April

9. CSI X-Coordinate Deviation 15 Deg. Mask – 4 April

10. CSI Y-Coordinate Deviation 15 Deg. Mask – 4 April

11. CSI Height Deviation 15 Deg. Mask – 4 April

12. Septentrio X-Coordinate Deviation 0 Deg. Mask – 17 April

13. CSI X-Coordinate Deviation0 Deg. Mask – 17 April

14. Septentrio X-Coordinate Deviation 0 Deg. Mask – 16 May

15. Septentrio X-Coordinate Deviation 0 Deg. Mask – 16 May

16. Septentrio Y-Coordinate Deviation 0 Deg. Mask – 4 April

17. CSI Y-Coordinate Deviation 0 Deg. Mask – 4 April

18. Septentrio Y-Coordinate Deviation 0 Deg. Mask – 16 May

19. Septentrio Y-Coordinate Deviation 0 Deg. Mask – 16 May

20. Static - GPS vs. PRN126, X-Coordinate22 May

21. Static - GPS vs. PRN126, Y-Coordinate22 May

22. Static - GPS vs. PRN126, Height22 May

23. Accuracy Statistics

24. Accuracy Statistics

25. Conclusions • Availability in Warsaw • Analyzing 10 days of static testing has shown EGNOS availability at 98% of the time • Accuracy in Warsaw • Overall, EGNOS improved accuracy • During some observations EGNOS did not improve GPS accuracy • Receiver used less satellites with EGNOS • A minimum of three RIMS stations need to monitor the same GPS satellite to provide EGNOS corrections

26. Conclusions • Commercial Receivers • Some commercial receivers have EGNOS options but do not receive SBAS signals • Further Testing • Find popular commercial receivers that provide EGNOS corrections • Integrate mobile testing with an INU