Augmentation of GPS/LAAS with GLONASS: Performance Assessment

P. Misra, M. Pratt, and B. Burke

Abstract:	GLONASS has been proposed as an augmentation to GPSILAAS. We examine the incremental benefits of the additional signals from GLONASS to the availability of service for precision approaches. The methodology used for the modeling of availability is the same as that adopted previously for the analysis of GPS/LAAS. The inclusion of GLONASS signals requires provision for adapting the models of measurement errors to account for the differences between GPS and GLONASS. The main difference of significance to LAAS is due to the frequency division multiple access scheme used by GLONASS, and the resultant inter-frequency biases in the measurements. The errors introduced by such biases at the reference and user receivers are uncorrelated, and have to be accounted for in the error models. As expected, the availability of service improves considerable y with the additional ranging sources. The combined GPS and GLONASS signals provide consistent and robust performance with high levels of availability of service for the most demanding precision approaches.
Published in:	Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998) September 15 - 18, 1998 Nashville, TN
Pages:	495 - 501
Cite this article:	Misra, P., Pratt, M., Burke, B., "Augmentation of GPS/LAAS with GLONASS: Performance Assessment," Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998), Nashville, TN, September 1998, pp. 495-501.
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