1. Test of Seres receiver using EGNOS signal Joanna Czapska joanna.czapska@gmail.com Warsaw University of Technology Faculty of Geodesy and Cartography

2. Seres receiver

3. The Seres receiver Uses a new GPS engine Uses a new GPS engine Cooperates with EGNOS, WAAS, MSAS satellite systems Cooperates with EGNOS, WAAS, MSAS satellite systems Two modes of operation: Two modes of operation: With EGNOS correctionWith EGNOS correction Without EGNOS correctionWithout EGNOS correction

4. Description of the test First part static surveying in Warsaw First part static surveying in Warsaw One measurement siteOne measurement site Second part static surveying in Józefosław Second part static surveying in Józefosław Four measurement sitesFour measurement sites

5. Data received in the first part Obtained ∆x, ∆y and ∆h Obtained ∆x, ∆y and ∆h From these calculated R 2 and R 3 From these calculated R 2 and R 3

6. Graph I R R 2 variation in time with EGNOS correction and without the correction

7. Graph II R R 3 variation in time with EGNOS correction and without the correction

8. Comparison of average distances R 2 and R 3 Comparison of average distances R 2 and R 3 MeasurementR 2 avg, /m/R 3 avg. /m/ With EGNOS1,43843,0558 Without EGNOS1,58843,0892 Difference0,15000,0334 Results

9. Results Comparison of standard deviations R 2 and R 3 Comparison of standard deviations R 2 and R 3 MeasurementStd. Dev. for R 2 avg, /m/ Std. Dev. for R 3 avg, /m/ With EGNOS 0,82251,7201 Without EGNOS 0,99962,0057 Difference0,17710,2856

10. Comparison of σ-errors for R 2 (68%-σ, 95%-2σ, 99%-3σ) Surveing with EGNOS correction Surveing without EGNOS correction

11. Comparison of σ-errors for R 2 σ2σ3σ Radius value /m/ Measurement with EGNOS 1,72193,45005,0041 Radius value /m/ Measurement without EGNOS 1,81093,52636,9702 Difference0,08900,07631,9661

12. Comparison of σ-errors for R 3 σ2σ3σ Radius value /m/ Measurement with EGNOS 3,01646,747910,1639 Radius value /m/ Measurement without EGNOS 3,53007,050516,8769 Difference0,51360,30266,7130

13. Results - Summary R2R2R2R2 R3R3R3R3 Influence of EGNOS correction on the measurements. Calculated for (3σ) 28,2% (better measurement results with EGNOS correction) 39,8% (better measurement results with EGNOS correction)

14. Data received in the second part Obtained geographical coordinates: B, L, H (four points A, B, C and D) Obtained geographical coordinates: B, L, H (four points A, B, C and D) Astrogeodetic Observatory in Józefosław Astrogeodetic Obserwatory in Józefosław

15. Comparison of σ-errors for R 2 Differences of the results with EGNOS and without EGNOS correction σ2σ3σ Site A 0,07110,46770,5083 Site B 0,0155 -0,4611 (worse measurement results with EGNOS correction) -0,4648 (worse measurement results with EGNOS correction) Site C 0,01610,23900,2441 Site D 0,21902,10802,1634

16. Comparison of σ-errors for R 3 Differences of the results with EGNOS and without EGNOS correction σ2σ3σ Site A 0,44180,76430,7477 Site B 0,00500,07230,1220 Site C 1,18071,33071,3097 Site D 0,35743,39573,4831

17. Results - Summary Influence of EGNOS correction in percents. Calculated for 3σ R2R3 Site A 41,5%42,5% Site B -75,4% (worse measurement result with EGNOS correction) 9,2% Site C 21,1%53,2% Site D 72,5%75,8%

18. Site A coordinates obtained with EGNOS correction and without this correction Without EGNOS H=1,04 m True coordinates H=0,00 m With EGNOS H=0,70m

19. Site B coordinates obtained with EGNOS correction and without this correction Site B coordinates obtained with EGNOS correction and without this correction Without EGNOS H=0,89 m True coordinates H=0,00 m With EGNOS H=1,07m

20. Site C coordinates obtained with EGNOS correction and without this correction Without EGNOS H=0,68 m True coordinates H=0,00 m With EGNOS H=0,37m

21. Site D coordinates obtained with EGNOS correction and without this correction Without EGNOS H=1,28 m With EGNOS H=1,01m True coordinates H=0,00 m

22. Conclusion EGNOS correction improves accuracy of the measurements. EGNOS correction improves accuracy of the measurements. The Seres receiver has very fast start-up and acquisition times. The Seres receiver has very fast start-up and acquisition times. It is very handy and easy to transportIt is very handy and easy to transport It is very easy to useIt is very easy to use

23. Thank You Have a nice day. Have a nice day.