Position-Domain Geometry Screening to Maximize LAAS Availability in the Presence of Ionosphere Anomalies

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dc.contributor.authorLee, Jiyunko
dc.contributor.authorLuo, Mingko
dc.contributor.authorPullen, Samko
dc.contributor.authorPark, Young Shinko
dc.contributor.authorEnge, Perko
dc.contributor.authorBrenner, Matsko
dc.date.accessioned2011-07-14-
dc.date.available2011-07-14-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2006-09-
dc.identifier.citation19th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2006), pp.393 - 408-
dc.identifier.urihttp://hdl.handle.net/10203/24617-
dc.description.abstractAll fault modes in the Local Area Augmentation System should be mitigated within the specified integrity risk allocation to guarantee the safety of a landing aircraft. However, monitoring within the LAAS Ground Facility is insufficient to completely protect users from unacceptable errors due to ionosphere spatial gradient anomalies. A methodology has been developed to inflate the broadcast ópr_gnd and óvig so that subset satellite geometries (i.e., subsets of the set of approved GPS satellites for which the LGF broadcasts valid corrections) for which unacceptable errors are possible are made unavailable to users. The required sigma inflation factors are computed offline and are input into each LGF site during site installation. These offline simulations and the resulting inflation factors are updated periodically to insure that they remain sufficient to mitigate residual ionosphere anomaly risk. This paper describes the updated ionosphere threat space and the geometry screening algorithm required to be implemented to support the FAA/Honeywell LAAS Provably Safe Prototype (PSP) at Memphis airport. It also demonstrates by simulation results that the required availability of integrity for CAT I approaches is achievable with the proposed method.-
dc.description.sponsorshipThe constructive comments and advice regarding this work provided by many other people in the Stanford GPS research group are greatly appreciated. The authors would also like to thank Boris Pervan (IIT), John Warburton and Tom Dehel (FAA Technical Center), and Bruce DeCleene and Barbara Clark (FAA Aircraft Certification) for their help and advice. The authors gratefully acknowledge the Federal Aviation Administration Satellite Navigation LAAS Program Office for supporting this research. The opinions discussed here are those of the authors and do not necessarily represent those of the FAA or other affiliated agencies.en
dc.languageEnglish-
dc.language.isoen_USen
dc.publisherInstitute of Navigation-
dc.titlePosition-Domain Geometry Screening to Maximize LAAS Availability in the Presence of Ionosphere Anomalies-
dc.typeConference-
dc.type.rimsCONF-
dc.citation.beginningpage393-
dc.citation.endingpage408-
dc.citation.publicationname19th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2006)-
dc.identifier.conferencecountryUS-
dc.identifier.conferencelocationFort Worth, TX-
dc.embargo.liftdate9999-12-31-
dc.embargo.terms9999-12-31-
dc.contributor.localauthorLee, Jiyun-
dc.contributor.nonIdAuthorLuo, Ming-
dc.contributor.nonIdAuthorPullen, Sam-
dc.contributor.nonIdAuthorPark, Young Shin-
dc.contributor.nonIdAuthorEnge, Per-
dc.contributor.nonIdAuthorBrenner, Mats-
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AE-Conference Papers(학술회의논문)
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