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Multi-GNSS PPP/INS tightly coupled integration with atmospheric augmentation and its application in urban vehicle navigation / Shengfeng Gu in Journal of geodesy, vol 95 n° 6 (June 2021)  

Public [article]  inJournal of geodesy > vol 95 n° 6 (June 2021) . - n° 64 Titre : Multi-GNSS PPP/INS tightly coupled integration with atmospheric augmentation and its application in urban vehicle navigation Type de document : Article/Communication Auteurs : Shengfeng Gu, Auteur ; Chunqi Dai, Auteur ; Wentao Fang, Auteur ; et al., Auteur Année de publication : 2021 Article en page(s) : n° 64 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] centrale inertielle [Termes IGN] correction atmosphérique [Termes IGN] couplage GNSS-INS [Termes IGN] milieu urbain [Termes IGN] navigation automobile [Termes IGN] positionnement ponctuel précis [Termes IGN] retard ionosphèrique [Termes IGN] teneur verticale totale en électrons [Termes IGN] Wuhan (Chine) Résumé : (auteur) Precise point positioning (PPP) is receiving increasing interest due to its cost-effectiveness, global coverage and high accuracy. However, its application in the urban environment is still full of challenges due to the satellite tracking sky-view. Thus, we presented a comprehensive positioning model by fusing the multi-GNSS (global navigation satellite system) combination, GNSS/INS (inertial navigation system) tightly coupled integration as well as the ionospheric and tropospheric augmentation in the undifferenced and uncombined PPP. The performance of this model in dual-frequency and single-frequency positioning was assessed with two experiments that denoted as T019 and T023, respectively, and both the experiments were carried out in a real urban environment. Particularly, the experiment T023 was carried out in the Second Ring Road of Wuhan city, which can be regarded as a typical downtown environment. Concerning the regional atmospheric augmentation, observations from 5 reference stations with an inter-station distance of about 40 km were also collected during the experimental time. The comparison between reference stations suggested that the regional tropospheric model had a precision of better than 0.6 cm in terms of zenith tropospheric delay, while the regional ionospheric model had a precision of around 0.5 total electron content unit in terms of Vertical Total Electron Content. It can be concluded that the GPS-only PPP can be improved significantly for urban vehicle navigation with these techniques, i.e., the multi-GNSS, INS tightly coupled integration and the atmospheric augmentation, through the positioning analysis, while INS tightly coupled integration makes the most contributions under the downtown environment, and the improvement of the regional atmospheric augmentation in single-frequency PPP is more significant since that single frequency is more sensitive to the ionospheric delay. In addition, it is proved that the regional atmospheric augmentation accelerates positioning convergence. The 3D positioning root-mean-square (RMS) with the comprehensive positioning model for dual frequency are 0.22 m and 0.77 m for T019 and T023, respectively. Concerning single-frequency PPP, the 3D RMS is 0.45 m and 1.17 m for T019 and T023, respectively. Moreover, taking the lane-level navigation under the downtown environment of T023 into consideration, we further presented the cumulative frequency of the horizontal positioning error less than 1 m, i.e., P(dN2+dE2−−−−−−−−−√ Numéro de notice : A2021-429 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-021-01514-8 date de publication en ligne : 26/05/2021 En ligne : https://doi.org/10.1007/s00190-021-01514-8 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=97789 [article]

Multimodal scene understanding: algorithms, applications and deep learning, ch. 8. Multimodal localization for embedded systems: a survey / Imane Salhi (2019)  

Public Titre de série : Multimodal scene understanding: algorithms, applications and deep learning, ch. 8 Titre : Multimodal localization for embedded systems: a survey Type de document : Chapitre/Contribution Auteurs : Imane Salhi, Auteur ; Martyna Poreba , Auteur ; Erwan Piriou, Auteur ; Valérie Gouet-Brunet , Auteur ; Maroun Ojail, Auteur Editeur : Londres, New York : Academic Press Année de publication : 2019 Importance : pp 199 - 278 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] compréhension de l'image [Termes IGN] fusion de données [Termes IGN] géopositionnement [Termes IGN] instrument embarqué [Termes IGN] navigation automobile [Termes IGN] navigation pédestre [Termes IGN] réalité mixte Résumé : (Auteur) Localization by jointly exploiting multimodal information, like cameras, inertial measurement units (IMU), and global navigation satellite system (GNSS) data, is an active key research topic for autonomous embedded systems such as smart glasses or drones. These systems have become topical for acquisition, modeling, and interpretation for scene understanding. The exploitation of different sensor types improves the robustness of the localization, e.g. by merging the accuracy of one sensor with the reactivity of another one in a flexible manner. This chapter presents a survey of the existing multimodal techniques dedicated to the localization of autonomous embedded systems. Both the algorithmic and the hardware architecture sides are investigated in order to provide a global overview of the key elements to be considered when designing these embedded systems. Several applications in different domains (e.g. localization for mapping, pedestrian localization, automotive navigation and mixed reality) are presented to illustrate the importance of such systems nowadays in scene understanding. Numéro de notice : H2019-001 Affiliation des auteurs : LaSTIG MATIS+Ext (2012-2019) Thématique : IMAGERIE Nature : Chapître / contribution nature-HAL : ChOuvrScient DOI : 10.1016/B978-0-12-817358-9.00014-7 date de publication en ligne : 02/08/2019 En ligne : https://doi.org/10.1016/B978-0-12-817358-9.00014-7 Format de la ressource électronique : URL chapitre Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93300

The future is already here / Sampo Savolainen in GEO: Geoconnexion international, vol 15 n° 10 (November - December 2016)

Public [article]  inGEO: Geoconnexion international > vol 15 n° 10 (November - December 2016) . - pp 30 - 31 Titre : The future is already here Type de document : Article/Communication Auteurs : Sampo Savolainen, Auteur ; Anita Lankinen, Auteur Année de publication : 2016 Article en page(s) : pp 30 - 31 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données [Termes IGN] acquisition de données [Termes IGN] client [Termes IGN] infrastructure urbaine de données localisées [Termes IGN] lever mobile [Termes IGN] navigation automobile Résumé : (éditeur) Sampo Savolainen and Anita Lankinen look at some of the latest technological advances and analyse how they use spatial data infrastructures, what else can and should be done, and explore what role they will play in our future. Numéro de notice : A2016-774 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82464 [article]

Quo vademus : Future automotive GNSS positioning in urban scenarios / Martin Escher in GPS world, vol 27 n° 5 (May 2016)  

Public [article]  inGPS world > vol 27 n° 5 (May 2016) . - pp 46 - 52 Titre : Quo vademus : Future automotive GNSS positioning in urban scenarios Type de document : Article/Communication Auteurs : Martin Escher, Auteur ; Mirko Stanisak, Auteur ; Ulf Bestmann, Auteur Année de publication : 2016 Article en page(s) : pp 46 - 52 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] Basse-Saxe (Allemagne) [Termes IGN] Brunswick [Termes IGN] navigation automobile [Termes IGN] positionnement par GNSS [Termes IGN] véhicule automobile Résumé : (éditeur) Driving in built-up areas, buildings can block the signals from GPS satellites. But if the receiver can access the signals of two or more GNSSs, position fixes might be available where none were possible with GPS alone, and the accuracies of marginal fixes might be improved. The authors look at using multi-GNSS for navigating in the heart of a city and how the additional signals can help us to get where we’re going. Numéro de notice : A2016-227 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article En ligne : http://gpsworld.com/innovation-quo-vademus/ Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80697 [article]

The role of contextual info-marks in navigating a virtual rural environment / Adam Rousell in Transactions in GIS, vol 20 n° 1 (February 2016)  

Public [article]  inTransactions in GIS > vol 20 n° 1 (February 2016) . - pp 1 – 19 Titre : The role of contextual info-marks in navigating a virtual rural environment Type de document : Article/Communication Auteurs : Adam Rousell, Auteur ; Claire Jarvis, Auteur ; Chris Brunsdon, Auteur Année de publication : 2016 Article en page(s) : pp 1 – 19 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes IGN] analyse contextuelle [Termes IGN] calcul d'itinéraire [Termes IGN] géovisualisation [Termes IGN] milieu rural [Termes IGN] monde virtuel [Termes IGN] navigation automobile [Termes IGN] petit écran [Termes IGN] point de repère [Termes IGN] prise en compte du contexte Résumé : (auteur) Navigation is a task performed in both large and small scale environments. Landmarks within an environment are of great benefit to these navigational tasks, but in large rural environments such landmarks may be sparse. It has been shown that landmarks need not be purely visual and that a change in context for a feature can make it become a landmark against its surroundings (such as being provided with significant meaning). Such meaning could be added through personal experience or by informing the observer via some form of communication. To investigate the effects of providing such contextual information on navigational performance, experiments were conducted in a large rural virtual environment where the delivery method of the information was varied between onscreen and PDA display. Users were instructed to perform a route tracing navigation task. In some instances users were presented with textual information about specific locations within the environment which appeared when they were in the vicinity of the location. Both quantitative and qualitative data were collected and analyzed, with results indicating that although the actual performance in the task was not significantly improved, users felt that their performance was better and the task easier when they were presented with the contextual information. Numéro de notice : A2016-445 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern En ligne : http://dx.doi.org/10.1111/tgis.12136 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81353 [article]

A hybrid link-node approach for finding shortest paths in road networks with turn restrictions / Qingquan Li in Transactions in GIS, vol 19 n° 6 (December 2015)  

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Car navigation – computing routes that avoid complicated crossings / Jukka Mathias Krisp in International journal of geographical information science IJGIS, vol 29 n° 11 (November 2015)  

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Un monde à part / Françoise de Blomac in DécryptaGéo le mag, n° 161 (01/11/2014)

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An assisting, constrained 3D navigation technique for multiscale virtual 3D city models / Dieter Hildebrandt in Geoinformatica, vol 18 n° 3 (July 2014)  

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TARS: traffic-aware route search / Roy Levin in Geoinformatica, vol 18 n° 3 (July 2014)  

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Finding the right algorithm: low-cost, single-frequency GPS-GLONASS RTK for road users / Sébastien Carcanague in Inside GNSS, vol 8 n° 6 (November - December 2013) 

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A GIS-based vehicle mobility estimator for operational contexts / A. Homann in Transactions in GIS, vol 17 n° 1 (February 2013)  

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Intégration d'infos-trafic temps réel dans un moteur de calcul d'itinéraires : Projet des élèves ingénieur de l'ENSG / Alexandre Pauthonnier in Géomatique expert, n° 81 (01/07/2011)  

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Demands of the road: an assisted-GNSS solution uses the EGNOS data access service / K. Sheridan in GPS world, vol 22 n° 3 (March 2011)

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GNSS inside mobile phones: GPS, GLONASS, QZSS and SBAS in a single chip / Franck Van Diggelen in Inside GNSS, vol 6 n° 2 (March - April 2011)  

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