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Combined integrity of GPS and Galileo / F. Kneissl in Inside GNSS, vol 5 n° 1 (January - February 2010)
[article]
Titre : Combined integrity of GPS and Galileo Type de document : Article/Communication Auteurs : F. Kneissl, Auteur ; C. Stober, Auteur Année de publication : 2010 Article en page(s) : 12 p. ; pp 52 - 63 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] données Galileo
[Termes IGN] données GPS
[Termes IGN] intégrité des données
[Termes IGN] problème inverse
[Termes IGN] système d'extensionRésumé : (Auteur) Integrity as the measure of trust placed in the correctness of the information provided by navigation systems is clearly one key factor of safety critical applications, such as precision landing procedures and precise maritime harbor applications. With the existing protection level concept employed by SBAS + GPS and the computation of the integrity risk at the alarm limit used within the upcoming Galileo baseline integrity concept, two different approaches will be available within the near future. Although both concepts share the same objective to describe the integrity of a user — and therefore have several basics in common — each respective system’s usage of information provided by the other concept is not foreseen. This column examines GPS and Galileo integrity methods and proposes an algorithm for a combined integrity approach using data from both, as well as practical issues of implementation and computation of associated protection levels. Copyright Gibbons Media & Research LLC Numéro de notice : A2010-612 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33551
in Inside GNSS > vol 5 n° 1 (January - February 2010) . - 12 p. ; pp 52 - 63[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 159-2010011 SL Revue Centre de documentation Revues en salle Disponible Documents numériques
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Combined integrity of GPS ... - pdf éditeurAdobe Acrobat PDF Shifting satellites: GNSS update / Huibert-Jan Lekkerkerk in Geoinformatics, vol 13 n° 1 (01/01/2010)
[article]
Titre : Shifting satellites: GNSS update Type de document : Article/Communication Auteurs : Huibert-Jan Lekkerkerk, Auteur Année de publication : 2010 Article en page(s) : pp 18 - 20 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] BeiDou
[Termes IGN] constellation GPS
[Termes IGN] Etats-Unis
[Termes IGN] European Geostationary Navigation Overlay Service
[Termes IGN] Galileo
[Termes IGN] Global Orbitography Navigation Satellite System
[Termes IGN] GLONASS System of Differential Correction and Monitoring
[Termes IGN] GPS-Aided Geo Augmented Navigation
[Termes IGN] Quasi-Zenith Satellite System
[Termes IGN] système d'extensionRésumé : (Auteur) The US is planning to reconfigure the GPS constellation to provide a better, 27-satellite geometry over Afghanistan. At the moment 30 GPS satellites are operational but a number of these are located quite close together effectively creating a 24 satellite constellation. With the proposed reconfiguration the currently experienced outages in mountainous Afghanistan could be countered. If the repostioning takes place it would take around six months to complete. Copyright GEOinformatics Numéro de notice : A2010-030 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30226
in Geoinformatics > vol 13 n° 1 (01/01/2010) . - pp 18 - 20[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 262-2010011 SL Revue Centre de documentation Revues en salle Disponible U-SBAS: A universal multi-SBAS standard to ensure compatibility, interoperability and interchangeability / Mohamed Sahmoudi (2010)
Titre : U-SBAS: A universal multi-SBAS standard to ensure compatibility, interoperability and interchangeability Type de document : Article/Communication Auteurs : Mohamed Sahmoudi, Auteur ; Jean-Luc Issler, Auteur ; Felix Perozans, Auteur ; Youssef Tawk, Auteur ; Aleksandar Jovanovic, Auteur ; Cyril Botteron, Auteur ; Pierre-André Farine, Auteur ; Landry René, Auteur ; Véronique Dehant, Auteur ; Alessandro Caporali, Auteur ; Serge Reboul, Auteur ; Pascal Willis , Auteur Editeur : New York : Institute of Electrical and Electronics Engineers IEEE Année de publication : 2010 Conférence : NAVITEC 2010, 5th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing 08/12/2010 10/12/2010 Noordwijk Pays-Bas Proceedings IEEE Importance : 18 p. Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] interopérabilité
[Termes IGN] standard
[Termes IGN] système d'extensionRésumé : (auteur) Several regional augmentation GNSS systems (like SBAS) are already fully operational and other are under development with new frequencies and signals on the way. Therefore, it becomes imperative to guarantee for all GNSS users the compatibility, interoperability and interchangeability between all these systems. The goal is to ensure that the user's multi-mode receiver can choose and mix signals from different GNSS and SBAS systems to achieve more availability, accuracy and robustness. Attaining that objective will require agreements on frequency plans and signal designs, as well as other details including means to ensure interoperability of system times and geodetic reference systems. This paper suggests a Universal-SBAS (U-SBAS) standard, compatible with all the existing and planned regional GNSS systems (and their evolutions) in the world, like IRNSS, QZSS, PCW, BEIDOU-1, WAAS, EGNOS, SDCM, GAGAN, MSAS. The proposed worldwide multimodal U-SBAS standard carries additional channels (signals and messages) to cover the non-aeronautical specific Safety-of-Life (SoL) services, and also High Precision Positioning Services (HPPS), Position Velocity Time (PVT), authentication services, safety services, scientific application services, High Precision Timing Services (HPTS), etc. U-SBAS is designed to be fully interoperable with the current SBAS standards and to allow significant performance and service improvements in operational, scientific and/or security areas. Finally usage examples of the proposed standard are given for different types of applications such as science, aviation, precise point positioning, timing, security, robust positioning, maritime and reflectometry. Numéro de notice : C2010-074 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1109/NAVITEC.2010.5708076 En ligne : https://doi.org/10.1109/NAVITEC.2010.5708076 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102057 Optimistic outlook for Galileo / G. Angrisano in GIM international, vol 23 n° 5 (May 2009)
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Titre : Optimistic outlook for Galileo Type de document : Article/Communication Auteurs : G. Angrisano, Auteur ; E. Rowan, Auteur ; R. Haring, Auteur Année de publication : 2009 Article en page(s) : pp 6 - 13 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] European Geostationary Navigation Overlay Service
[Termes IGN] Galileo
[Termes IGN] Global Navigation Satellite System
[Termes IGN] précision du positionnement
[Termes IGN] signal GPSRésumé : (Auteur) This month we bring you an extended interview with engineer Perdo Pedreira, executive director of the European Global Navigation Satellite System Supervisory Authority (GSA). Since July 2005, the body charged with managing the development phase of the much-troubled European Satellite navigation system Galileo, its anticipated economic benefits, in terms of revenue, employment and expanding markets, are many. Galileo is being funded by the EU taxpayer, so it is important that these benefits be realised. Copyright Reed Business Numéro de notice : A2009-243 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29873
in GIM international > vol 23 n° 5 (May 2009) . - pp 6 - 13[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 061-09051 RAB Revue Centre de documentation Revues en salle Disponible The WAAS L5 signal: an assessment of its behavior and potential end use / H. Rho in GPS world, vol 20 n° 5 (May 2009)
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Titre : The WAAS L5 signal: an assessment of its behavior and potential end use Type de document : Article/Communication Auteurs : H. Rho, Auteur ; R.B. Langley, Auteur Année de publication : 2009 Article en page(s) : pp 42 - 48 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement du signal
[Termes IGN] signal GPS
[Termes IGN] signal multidimensionnel
[Termes IGN] test de performance
[Termes IGN] Wide Area Augmentation SystemRésumé : (Auteur) The recent launch of the GPS Block IIR-20(M) satellite and the commissioning of its L5 demonstration payload herald the beginning of a bright new era in space-based positioning, navigation, and timing. The new satellite signal is anticipated to provide better-quality range measurements and possibly improve the tracking performance of a GPS receiver compared with current civil L1 and L2 signals through use of improved signal structures. The L5 signal will be standard on the future Block IIF and Block III satellites.
However, some readers may be surprised to learn that L5 signals have been continuously transmitted by a pair of satellites for the past several years. The geostationary Earth-orbiting (GEO) satellites used by the U.S. Federal Aviation Administration's (FAA's) Wide Area Augmentation System to provide enhanced integrity and accuracy include not only an L1 payload but an L5 payload as well. While the WAAS L5 signals have been broadcast from space for some time, they did not come from a satellite in medium Earth orbit, and so it was necessary to include the demonstration payload on the GPS Block IIR-20(M) satellite to guarantee the L5 frequency filing with the International Telecommunication Union.
There are some differences between the WAAS L5 signals and the future fully fledged GPS L5 signals. The WAAS L5 signals only use a single-channel carrier (there is no quadrature or Q channel) and the data rate is 250 bits per second (bps) rather than 50 bps. The WAAS signals are actually generated on the ground and relayed through the GEOs using a "bent pipe" approach. The FAA uses the L5 signals, in conjunction with the L1 signals, to compute ionospheric delays as part of the closed-loop control of the broadcast signals.
Although the WAAS L5 signals are not yet intended for end users, can they be used now for positioning and navigation and, if so, are there any caveats? In this month's column, I am joined by one of my graduate students, Hyun-ho Rho, who has looked at the WAAS L5 transmissions, examining their signal strengths, multipath characteristics, and instrumental bias issues. Precise positioning performance of WAAS pseudoranges has also been assessed as an independent check on instrumental bias compensation by the WAAS control segment. The favorable results point to a future of the L5 signal, on both the WAAS satellites and the next-generation GPS satellites, which is bright indeed. Copyright Questex Media GroupNuméro de notice : A2009-178 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29808
in GPS world > vol 20 n° 5 (May 2009) . - pp 42 - 48[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-09051 SL Revue Centre de documentation Revues en salle Disponible Géopositionnement et mobilités / Yves Alexandre (2009)PermalinkA-GPS / Franck Van Diggelen (2009)PermalinkAGNSS [Assisted GNSS] standardisation: the path to success in location-based services / M. Monnerat in Inside GNSS, vol 3 n° 5 (July - August 2008)PermalinkGood, better, best: expanding the wide area augmentation system / T. Schrempp in GPS world, vol 19 n° 1 (January 2008)PermalinkPrinciples of GNSS, inertial, and multisensor integrated navigation systems / Paul D. Groves (2008)PermalinkMise en place d'une procédure de post-traitement GPS pour du lever cadastral massif / Fabien Coubard (2007)PermalinkGNSS update: positive and negative developments / Huibert-Jan Lekkerkerk in Geoinformatics, vol 9 n° 5 (01/07/2006)PermalinkShaping euro navigation / T. Deloye in GEO: Geoconnexion international, vol 5 n° 5 (may 2006)PermalinkEGNOS takes flight: aviation trials signal benefits in difficult approach environments / H. Veerman in GPS world, vol 17 n° 4 (April 2006)PermalinkContracts and promising test results: update Galileo, EGNOS, Glonass and GPS / Huibert-Jan Lekkerkerk in Geoinformatics, vol 9 n° 1 (01/01/2006)PermalinkEarly results are in testing a prototype Galileo receiver / N. Gerein in GPS world, vol 16 n° 11 (November 2005)PermalinkPermalinkGalileo, the new standard for satellite navigation : from GPS to GNSS / R. Wevers in Geoinformatics, vol 8 n° 5 (01/08/2005)PermalinkSatellite navigation, wireless networks and the internet: greater together than the sum of the parts? / F. Toran in ESA bulletin, n° 121 (February 2005)PermalinkApplied satellite navigation using GPS, Galileo, and augmentation systems / R. Prasad (2005)PermalinkFollowing the tour de France with EGNOS / D. Detain in ESA bulletin, n° 120 (01/11/2004)PermalinkEGNOS navigation applications: a chance for Europe / A. Garcia in ESA bulletin, n° 119 (August 2004)PermalinkPerformance analysis of the real-time Canada-wide DGPS service (CDGPS) / M.E. Cannon in Geomatica, vol 58 n° 2 (June 2004)PermalinkPosition via Internet: SISNeT catches GPS in urban canyons / F. Toran in GPS world, vol 15 n° 4 (April 2004)Permalinkvol 51 n° 203 - 01/07/2003 (Bulletin de Navigation aérienne, maritime, spatiale, terrestre) / Institut français de navigationPermalink