Analysis of the use of GPS + GLONASS for Aviation Applications

Angelo Joseph, Bernard Schnaufer and Jeremy Kazmierczak

Abstract:	In this paper the challenges and potential benefits of using a combined GPS + GLONASS receiver for aviation applications are studied through simulation and flight test data collection and analysis. First, the impact using GPS combined with GLONASS for Receiver Autonomous Integrity Monitoring (RAIM) is analyzed using published measurement error models for both constellations. World-wide availability of integrity for the combined GPS + GLONASS constellation is computed for a representative phase of flight involving horizontal guidance. These results are analyzed in terms of the potential operational benefits that are possible with the combined constellation. Next, the performance of un-augmented GPS + GLONASS is analyzed in a flight environment to study the navigation accuracy and integrity of the combined un-augmented signals. A number of flight maneuvers were conducted to understand the benefits of the additional satellites in view. The addition of Satellite Based Augmentation System (SBAS) ionospheric corrections to the GLONASS measurements is also studied as are the resulting horizontal protection levels of the combined constellation. Finally, the paper also discusses some of the challenges that remain in integrating GLONASS into an airborne receiver.
Published in:	Proceedings of the 27th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2014) September 8 - 12, 2014 Tampa Convention Center Tampa, Florida
Pages:	805 - 814
Cite this article:	Joseph, Angelo, Schnaufer, Bernard, Kazmierczak, Jeremy, "Analysis of the use of GPS + GLONASS for Aviation Applications," Proceedings of the 27th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2014), Tampa, Florida, September 2014, pp. 805-814.
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