New Advanced RAIM with Improved Availability for Detecting Constellation-wide Faults, Using Two Independent Constellations

Young C. Lee

Peer Reviewed

Abstract:	There has been much interest in providing a robust LPV-200 service worldwide through the 2020s relying on RAIM. However, conventional RAIM methods that were developed for the en route through non-precision approach phases of flight and based on the assumption of at most a single fault at any given time are not adequate for LPV-200 applications. For these applications, constellation-wide faults may need to be considered, among which faults caused by erroneous Earth orientation parameters (EOPs) have been identified to be of particular concern. Inter-constellation comparison (ICC) methods, which were previously proposed to detect constellation-wide faults, do not provide as high an LPV-200 availability as desired. This paper presents a new method that can detect constellation-wide faults using two independent constellations and examines its LPV-200 availability. This method has been shown to be very effective in detecting the EOP fault and provides significantly higher LPV-200 availability than the ICC methods.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 60, Number 1
Pages:	71 - 83
Cite this article:	Lee, Young C., "New Advanced RAIM with Improved Availability for Detecting Constellation-wide Faults, Using Two Independent Constellations", NAVIGATION: Journal of The Institute of Navigation, Vol. 60, No. 1, Spring 2013, pp. 71-83.
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