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Data quality assessment and the positioning performance analysis of BeiDou in Hong Kong / Y. Xu in Survey review, vol 47 n° 345 (November 2015)
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Titre : Data quality assessment and the positioning performance analysis of BeiDou in Hong Kong Type de document : Article/Communication Auteurs : Y. Xu, Auteur ; S. Ji, Auteur Année de publication : 2015 Article en page(s) : pp 446 - 457 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] mesurage de phase
[Termes IGN] positionnement différentiel
[Termes IGN] positionnement par BeiDou
[Termes IGN] positionnement par GNSS
[Termes IGN] positionnement par GPS
[Termes IGN] précision du positionnement
[Termes IGN] signal BeiDou
[Termes IGN] test de performanceRésumé : (auteur) As the satellite constellation, frequency structure, time and coordinate reference system of the Chinese BeiDou are all different from those of GPS, the quality of observations is also supposed to be different from GPS. At the same time, the positioning performance of the GPS and BeiDou combined system should be much better in view of the availability of more visible satellites. The purpose of this paper is to assess the quality of BeiDou pseudorange and carrier phase observation, and to compare the performance of GPS, BeiDou and the combined system in terms of availability, integrity and positioning accuracy with practical data in Hong Kong. The experiment results showed that the noise and multipath of GEOs (geostationary earth orbit satellites) pseudorange measurement fluctuates within 1.5 m, while the variations of IGSOs (geostationary earth orbit inclined geosynchronous orbit satellites) and MEOs (medium earth orbit satellites) are more obvious. The amplitudes of the triple-carrier combination of time series of GEOs, IGSOs and MEOs carrier phase measurements are 4, 6, and 6 mm, respectively. In addition, the absolute and relative positioning precision of BeiDou is very similar to that of GPS, and the performance of the combined systems is best. Numéro de notice : A2015-914 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1179/1752270615Y.0000000005 En ligne : https://doi.org/10.1179/1752270615Y.0000000005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79652
in Survey review > vol 47 n° 345 (November 2015) . - pp 446 - 457[article]Enhanced Loran : a wide-area multi-application PNT resiliency solution / Stephen Bartlett in GPS world, vol 26 n° 11 (November 2015)
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Titre : Enhanced Loran : a wide-area multi-application PNT resiliency solution Type de document : Article/Communication Auteurs : Stephen Bartlett, Auteur ; gerard Offermans, Auteur ; Charles Schue, Auteur Année de publication : 2015 Article en page(s) : pp 58 - 64 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] e-Loran
[Termes IGN] Etats-Unis
[Termes IGN] LORAN (système)Numéro de notice : A2015-825 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans En ligne : http://gpsworld.com/innovation-enhanced-loran/ Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79117
in GPS world > vol 26 n° 11 (November 2015) . - pp 58 - 64[article]Enhancing integrated indoor/outdoor mobility in a smart campus / Joaquín Torres-Sospedra in International journal of geographical information science IJGIS, vol 29 n° 11 (November 2015)
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Titre : Enhancing integrated indoor/outdoor mobility in a smart campus Type de document : Article/Communication Auteurs : Joaquín Torres-Sospedra, Auteur ; Joan Avariento, Auteur ; David Rambla, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 1955 - 1968 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] application informatique
[Termes IGN] cartographie numérique
[Termes IGN] évaluation
[Termes IGN] géopositionnement
[Termes IGN] implémentation (informatique)
[Termes IGN] positionnement en intérieur
[Termes IGN] réalité augmentéeRésumé : (Auteur) A Smart City relies on six key factors: Smart Governance, Smart People, Smart Economy, Smart Environment, Smart Living and Smart Mobility. This paper focuses on Smart Mobility by improving one of its key components: positioning. We developed and deployed a novel indoor positioning system (IPS) that is combined with an outdoor positioning system to support seamless indoor and outdoor navigation and wayfinding. The positioning system is implemented as a service in our broader cartography-based smart university platform, called SmartUJI, which centralizes access to a diverse collection of campus information and provides basic and complex services for the Universitat Jaume I (Spain), which serves as surrogate of a small city. Using our IPS and based on the SmartUJI services, we developed, deployed and evaluated two end-user mobile applications: the SmartUJI APP that allows users to obtain map-based information about the different facilities of the campus, and the SmartUJI AR that allows users to interact with the campus through an augmented reality interface. Students, university staff and visitors who tested the applications reported their usefulness in locating university facilities and generally improving spatial orientation. Numéro de notice : A2015-614 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2015.1049541 En ligne : https://doi.org/10.1080/13658816.2015.1049541 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78080
in International journal of geographical information science IJGIS > vol 29 n° 11 (November 2015) . - pp 1955 - 1968[article]Geometric integration of high-resolution satellite imagery and airborne LiDAR data for improved geopositioning accuracy in metropolitan areas / Bo Wu in ISPRS Journal of photogrammetry and remote sensing, vol 109 (November 2015)
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Titre : Geometric integration of high-resolution satellite imagery and airborne LiDAR data for improved geopositioning accuracy in metropolitan areas Type de document : Article/Communication Auteurs : Bo Wu, Auteur ; Shengjun Tang, Auteur ; Qing Zhu, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 139 - 151 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] données lidar
[Termes IGN] géométrie de l'image
[Termes IGN] Hong-Kong
[Termes IGN] image à très haute résolution
[Termes IGN] image Pléiades
[Termes IGN] image ZiYuan-3
[Termes IGN] intégration de données
[Termes IGN] milieu urbain
[Termes IGN] précision du positionnementRésumé : (auteur) High-resolution satellite imagery (HRSI) and airborne light detection and ranging (LiDAR) data are widely used for deriving 3D spatial information. However, the 3D spatial information derived from them in the same area can be inconsistent. Considering HRSI and LiDAR datasets taken from metropolitan areas as a case study, this paper presents a novel approach to the geometric integration of HRSI and LiDAR data to reduce their inconsistencies and improve their geopositioning accuracy. First, the influences of HRSI’s individual rational polynomial coefficients (RPCs) on geopositioning accuracies are analyzed and the RPCs that dominate those accuracies are identified. The RPCs are then used as inputs in the geometric integration model together with the tie points identified in stereo images and LiDAR ground points. A local vertical constraint and a local horizontal constraint are also incorporated in the model to ensure vertical and horizontal consistency between the two datasets. The model improves the dominating RPCs and the ground coordinates of the LiDAR points, decreasing the inconsistencies between the two datasets and improving their geopositioning accuracy. Experiments were conducted using ZY-3 and Pleiades-1 imagery and the corresponding airborne LiDAR data in Hong Kong. The results verify that the geometric integration model effectively improves the geopositioning accuracies of both types of imagery and the LiDAR points. Furthermore, the model enables the full comparative and synergistic use of remote sensing imagery and laser scanning data collected from different platforms and sensors. Numéro de notice : A2015-861 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2015.09.006 En ligne : https://doi.org/10.1016/j.isprsjprs.2015.09.006 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79242
in ISPRS Journal of photogrammetry and remote sensing > vol 109 (November 2015) . - pp 139 - 151[article]Global localization of autonomous robots in forest environments / Marwan Hussein in Photogrammetric Engineering & Remote Sensing, PERS, vol 81 n° 11 (November 2015)
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Titre : Global localization of autonomous robots in forest environments Type de document : Article/Communication Auteurs : Marwan Hussein, Auteur ; Matthew Renner, Auteur ; Karl Iagnemma, Auteur Année de publication : 2015 Article en page(s) : pp 839 - 846 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] données lidar
[Termes IGN] géopositionnement
[Termes IGN] lever mobile
[Termes IGN] navigation
[Termes IGN] précision métrique
[Termes IGN] robot mobile
[Termes IGN] télémétrie laser terrestreRésumé : (auteur) A method for the autonomous geolocation of ground vehicles in forest environments is presented. The method provides an estimate of the global horizontal position of a vehicle strictly based on finding a geometric match between a map of observed tree stems, scanned in 3D by Light Detection and Ranging (lidar) sensors onboard the vehicle, to another stem map generated from the structure of tree crowns analyzed from high resolution aerial orthoimagery of the forest canopy. The method has been tested with real-world data and has been able to estimate vehicle geoposition with an average error of less than 2 m. The method has two key properties that are significant: (a) The algorithm does not require a priori knowledge of the area surrounding the robot, and (b) Based on estimated vehicle state, it uses the geometry of detected tree stems as the only input to determine horizontal geoposition. Numéro de notice : A2015-963 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : 10.14358/PERS.81.11.839 En ligne : https://doi.org/10.14358/PERS.81.11.839 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80021
in Photogrammetric Engineering & Remote Sensing, PERS > vol 81 n° 11 (November 2015) . - pp 839 - 846[article]GPS and the 2015 Gorkha Earthquake / Mathias Lemmens in GIM international, vol 29 n° 11 (November 2015)
PermalinkHigh-latitude ionospheric irregularity drift velocity estimation using spaced GPS receiver carrier phase time–frequency analysis / Jun Wang in IEEE Transactions on geoscience and remote sensing, vol 53 n° 11 (November 2015)
PermalinkParticle filter-based estimation of inter-frequency phase bias for real-time GLONASS integer ambiguity resolution / Yumiao Tian in Journal of geodesy, vol 89 n° 11 (november 2015)
PermalinkPermalinkA temporal-contextual analysis of urban dynamics using location-based data / A. Yair Grinberger in International journal of geographical information science IJGIS, vol 29 n° 11 (November 2015)
PermalinkThe British contribution to the charting of the Adriatic sea / Mirela Slukan Altić in Cartographic journal (the), Vol 52 n° 4 (November 2015)
PermalinkTrajectory reconstruction from mobile positioning data using cell-to-cell travel time information / Toivo Vajakas in International journal of geographical information science IJGIS, vol 29 n° 11 (November 2015)
PermalinkUAV real-time: Data use in a lightweight direct georeferencing system / Christian Eling in GPS world, vol 26 n° 11 (November 2015)
PermalinkAPFiLoc: An Infrastructure-Free Indoor Localization method fusing smartphone inertial sensors, landmarks and map information / Jianga Shang in Sensors, vol 15 n° 10 (October 2015)
PermalinkBeiDou phase bias estimation and its application in precise point positioning with triple-frequency observable / Shengfeng Gu in Journal of geodesy, vol 89 n° 10 (october 2015)
PermalinkDefining a framework for integration of geospatial technologies for emergency management / V. Bhanumurthy in Geocarto international, vol 30 n° 9 - 10 (October - November 2015)
PermalinkEstimating the yaw-attitude of an BDS IGSO and MEO satellites / Xiaolei Dai in Journal of geodesy, vol 89 n° 10 (october 2015)
PermalinkFrom GPS and virtual globes to spatial computing - 2020 / Shashi Shekhar in Geoinformatica, vol 19 n° 4 (October - December 2015)
PermalinkGeneration of navigation graphs for indoor space / L. Yang in International journal of geographical information science IJGIS, vol 29 n° 10 (October 2015)
PermalinkInstantaneous ambiguity resolution for URTK and its seamless transition with PPP-AR / Xuan Zou in GPS solutions, vol 19 n° 4 (october 2015)
PermalinkPermalinkModéliser la marche urbaine et les relations environnement-usagers dans un SIG : Application à la ville de Luxembourg / Nadja Victor in Revue internationale de géomatique, vol 25 n° 4 (octobre - décembre 2015)
PermalinkMultiangle BSAR imaging based on BeiDou-2 navigation satellite system: experiments and preliminary results / Tao Zeng in IEEE Transactions on geoscience and remote sensing, vol 53 n° 10 (October 2015)
PermalinkPrecision comparison and analysis of four online free PPP services in static positioning and tropospheric delay estimation / Qiuying Guo in GPS solutions, vol 19 n° 4 (october 2015)
PermalinkRevealing a buried historic fort : archeology meets UAS technology / Andrea Sangster in Geoinformatics, vol 18 n° 7 (October - November 2015)
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