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Inter-signal correction sensitivity analysis : aperture-dependent delays induced by antenna anisotropy in modernized GPS dual-frequency navigation / Gary Okerson in Inside GNSS, vol 11 n° 3 (May - June 2016)  

Public [article]  inInside GNSS > vol 11 n° 3 (May - June 2016) Titre : Inter-signal correction sensitivity analysis : aperture-dependent delays induced by antenna anisotropy in modernized GPS dual-frequency navigation Type de document : Article/Communication Auteurs : Gary Okerson, Auteur ; Jeff Ross, Auteur ; Avram Tetewsky, Auteur ; Arnold Soltz, Auteur ; et al., Auteur Année de publication : 2016 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] analyse de sensibilité [Termes IGN] anisotropie [Termes IGN] antenne GPS [Termes IGN] récepteur bifréquence Résumé : (auteur) Cost-conscious civilian GPS receiver designers are faced with decisions as to whether to invest in L1/L2 front-ends or L1/L5 front–ends, as well as whether they want to expend the extra bandwidth to use narrow chip tap spacings. If a dual-frequency correction is made with one signal from GPS and the other from a different GNSS system, the designer must consider the signal attributes that will best serve their customers. GPS specification documents IS-GPS-200H and IS-GPS-705 provide the new modernized dual-frequency correction algorithm that uses inter-signal corrections to align all new GPS signals with the dual L1 and L2 PY ionosphere-free reference. This article provides the physics, derivations, and error budgets needed to go beyond the equations as presented in those specification documents. It will provide insights into how L1 and L2 and L1 and L5 dual-frequency alignment actually works when satellite antenna anisotropy is present, and, in particular, will provide receiver designers the additional insights needed for their specific application markets. Numéro de notice : A2016-598 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans En ligne : http://www.insidegnss.com/node/4957 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81779 [article]

Making sense of inter-signal corrections: accounting for GPS satellite calibration parameters in legacy and modernized ionosphere correction algorithms / Avram Tetewsky in Inside GNSS, vol 4 n° 4 (July - August 2009) 

Public [article]  inInside GNSS > vol 4 n° 4 (July - August 2009) . - 12 p. ; pp 37 - 48 Titre : Making sense of inter-signal corrections: accounting for GPS satellite calibration parameters in legacy and modernized ionosphere correction algorithms Type de document : Article/Communication Auteurs : Avram Tetewsky, Auteur ; Jeff Ross, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : 12 p. ; pp 37 - 48 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] bande L [Termes IGN] correction ionosphérique [Termes IGN] effet atmosphérique [Termes IGN] éphémérides de satellite [Termes IGN] satellite GPS [Termes IGN] signal GNSS Résumé : (Auteur) Because satellite designers cannot precisely eliminate small variations in delays among the various signal paths within the spacecraft, GPS signals don’t emerge from the satellite antennas at exactly the same time or from the same location. If not accounted for, these delay offsets would produce navigation fix errors for GPS users. In this article, the authors derive and explain the modernized ionosphere dual- and single-frequency correction algorithms that will resolve these inter-signal variations. They also explain how to modernize any new algorithm, how a single ephemeris models the satellite location when each L-band signal may have separate departure points, and why that one ephemeris might point to a location behind the satellite. Copyright Gibbons Media & Research LLC Numéro de notice : A2009-665 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33566 [article]

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