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RAIM Algorithms Analysis for a Combined GPS/GALILEO Constellation

Belabbas, Boubeker and Gass, Frédéric (2005) RAIM Algorithms Analysis for a Combined GPS/GALILEO Constellation. ION GNSS 2005, 2005-09-13 - 2005-09-16, Los Angeles, CA (USA).



How far a user can rely on his navigation system is a central question for safety of life applications like air navigation especially in approach phases. For Oceanic, En route or Non Precision Approach phases, the integrity requirements as defined by the ICAO (International Civil Aviation Organization) should be fulfilled by the future Galileo Safety of Life Service. This paper presents the performances of RAIM algorithms using a covariance matrix of a single frequency absolute positioning receiver noise calculated using one year measurement data. In the configuration of combined GPS/GALILEO constellation, the user will have the possibility to track at least 10 satellites at the same time. This high availability of satellites will provide a high availability of RAIM algorithms. The original approach used in this paper is to use the IPRE (Instantaneous Pseudo Range Error) developed in [1] as the input parameter of the RAIM algorithms. This concept provides a generalized covariance matrix of pseudo range noise taking into account correlations of pseudo range errors with close elevation and azimuth angles. Thanks to a Cholesky decomposition, it is always possible to use the classical χ2 distribution to obtain the fault detection threshold. The advantage of generalizing the RAIM methods is not only in the simplicity of the algorithm, but it is also in its efficiency thanks to lower protection levels obtained.

Item URL in elib:https://elib.dlr.de/19832/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:RAIM Algorithms Analysis for a Combined GPS/GALILEO Constellation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Date:September 2005
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:GPS, Galileo, GNSS, RAIM, Integrity, Cholesky
Event Title:ION GNSS 2005
Event Location:Los Angeles, CA (USA)
Event Type:international Conference
Event Dates:2005-09-13 - 2005-09-16
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W KN - Kommunikation/Navigation
DLR - Research area:Space
DLR - Program:W KN - Kommunikation/Navigation
DLR - Research theme (Project):W - Projekt GalileoNAV (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Navigation > Navigation and Control Systems
Deposited By: Belabbas, Boubeker
Deposited On:23 Jan 2006
Last Modified:31 Jul 2019 19:16

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