A Prototype 3-Frequency SBAS Receiver & Test Results

Dennis M. Akos, Konstantin Gromov, Todd Walter and Per Enge

Abstract:	When first commissioned, the Wide Area Augmentation System (WAAS) will support enroute navigation, terminal area navigation, nonprecision approaches and Lateral Navigation/Vertical Navigation (LNAV/VNAV) approaches. An analysis was made to examine the feasibility of an additional service that is closer to Category (CAT) I Precision Approach called GNSS Landing System (GLS) service. This paper is focused on one part of this analysis, which dealt with possible enhancements to the ionospheric integrity function, i.e., the function that generates Grid Ionospheric Vertical Errors (GIVEs). Four design options corresponding to two system architectures and two GIVE algorithms will be briefly discussed. The initial performance results obtained for these four options will be presented. With the lack of current three-frequency GNSS broadcasts, it is the goal of this paper to present how such an investigation will be attempted as well as initial test results. Such options include: the development a physical channel model and/ or identify common-clock multi-frequency transmission to test the RF hardware implementation as well as software signal process. Data has been collected from preliminary testing and will be included in the paper.
Published in:	Proceedings of the 57th Annual Meeting of The Institute of Navigation (2001) June 11 - 13, 2001 Albuquerque, NM
Pages:	522 - 529
Cite this article:	Akos, Dennis M., Gromov, Konstantin, Walter, Todd, Enge, Per, "A Prototype 3-Frequency SBAS Receiver & Test Results," Proceedings of the 57th Annual Meeting of The Institute of Navigation (2001), Albuquerque, NM, June 2001, pp. 522-529.
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