Tracking Error Modeling in Presence of Satellite Imperfections

M. Vergara, M. Sgammini, Y. Zhu, S. Thoelert, F. Antreich

Abstract:	Modeling both nominal distortions and signal anomalies (i.e. Evil waveforms, ICAO threat models) is crucial for an accurate user error budget for SBAS and GBAS (multi-frequency, multi-constellation). Such analysis of particular interest for the ongoing standardization work of L1-L5 SBAS services. In this paper we propose a method to jointly estimate the analogue and the digital distortions. This comes very useful in those cases in which the estimates of the two satellite imperfections are interdependent, e.g. when the time-bandwidth product is small. The impact of both satellite imperfections on the ranging performance of a GNSS receiver is assessed by means of analytical formulas which make use of the Cross-Power Spectrum (CPS) between the distorted and the ideal signal, and of the Power Spectral Density (PSD) of the nominal (ideal) signal.
Published in:	Proceedings of the 2014 International Technical Meeting of The Institute of Navigation January 27 - 29, 2014 Catamaran Resort Hotel San Diego, California
Pages:	246 - 253
Cite this article:	Updated citation: Published in NAVIGATION: Journal of the Institute of Navigation
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