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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
Titre : Lidar waveform modeling using a marked point process Type de document : Article/Communication Auteurs : Clément Mallet , Auteur ; Florent Lafarge, Auteur ; Uwe Soergel, Auteur ; Christian Heipke, Auteur ; Frédéric Bretar, Auteur Editeur : New York : Institute of Electrical and Electronics Engineers IEEE Année de publication : 07/11/2009 Conférence : ICIP 2009, 16th IEEE International Conference on Image Processing 07/11/2009 10/11/2009 Le Caire Egypte Proceedings IEEE Importance : 4 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement du signal
[Termes IGN] algorithme du recuit simulé
[Termes IGN] chaîne de Markov
[Termes IGN] données localisées 3D
[Termes IGN] forme d'onde
[Termes IGN] lasergrammétrie
[Termes IGN] méthode de Monte-Carlo
[Termes IGN] milieu urbain
[Termes IGN] processus ponctuel marqué
[Termes IGN] reconstruction du signal
[Termes IGN] semis de points
[Termes IGN] signal laser
[Termes IGN] signal lidarRésumé : (Auteur) Lidar waveforms are 1D signal consisting of a train of echoes where each of them correspond to a scattering target of the Earth surface. Modeling these echoes with the appropriate parametric function is necessary to retrieve physical information about these objects and characterize their properties. This paper presents a marked point process based model to reconstruct a lidar signal in terms of a set of parametric functions. The model takes into account both a data term which measures the coherence between the models and the waveforms, and a regularizing term which introduces physical knowledge on the reconstructed signal. We search for the best configuration of functions by performing a Reversible Jump Markov Chain Monte Carlo sampler coupled with a simulated annealing. Results are finally presented on different kinds of signals in urban areas. Numéro de notice : C2009-048 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE/POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1109/ICIP.2009.5413380 En ligne : https://doi.org/10.1109/ICIP.2009.5413380 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64296 Documents numériques
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Lidar waveform modeling ... - pdf auteurAdobe Acrobat PDF Analysis of ALOS-PRISM image geometry for advanced photogrammetric applications / Laurent Falala (2009)
Titre : Analysis of ALOS-PRISM image geometry for advanced photogrammetric applications Type de document : Article/Communication Auteurs : Laurent Falala, Auteur ; Pascal Favé, Auteur ; Patrick Gigord, Auteur Editeur : New York : Institute of Electrical and Electronics Engineers IEEE Année de publication : 2009 Conférence : IGARSS 2009, International Geoscience And Remote Sensing Symposium 12/07/2009 17/07/2009 Le Cap Afrique du sud Proceedings IEEE Importance : pp 188 - 191 Note générale : bibliographie Langues : Anglais (eng) Résumé : (auteur) This study was launched at IGN-France to better understand ALOS-PRISM image geometry and be able to use these images for photogrammetric applications especially DSM generation. From provided ancillary data, we managed to build PRISM rigorous location model with location accuracy around 70m without GCP and 2.5m after adjustment by a simple bias correction of pitch, roll, yaw and focal length with GCPs from Reference3D data. Dense image matching and statistical analysis of shifts between triplet images highlight a very accurate attitude determination but also remaining errors of focal planes calibration (up to 1 pixel). A DSM generated from a PRISM triplet over Rio, Brazil reaches DTED2 standard with topographical details like ridges and valleys well rendered. But comparison with Reference3D DSM also shows defects due to these remaining errors of focal planes calibration. Numéro de notice : C2009-025 Affiliation des auteurs : IGN (1940-2011) Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1109/IGARSS.2009.5417699 Date de publication en ligne : 18/02/2010 En ligne : https://doi.org/10.1109/IGARSS.2009.5417699 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90610 Automatic estimation of fine terrain models from multiple high-resolution satellite images / Nicolas Champion (2009)
Titre : Automatic estimation of fine terrain models from multiple high-resolution satellite images Type de document : Article/Communication Auteurs : Nicolas Champion , Auteur ; Didier Boldo , Auteur ; Georges Stamon, Auteur ; Marc Pierrot-Deseilligny , Auteur Editeur : New York : Institute of Electrical and Electronics Engineers IEEE Année de publication : 2009 Conférence : ICIP 2009, 16th IEEE International Conference on Image Processing 07/11/2009 10/11/2009 Le Caire Egypte Proceedings IEEE Importance : pp 577 - 580 Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] estimateur
[Termes IGN] image à résolution submétrique
[Termes IGN] image en couleur
[Termes IGN] méthode robuste
[Termes IGN] modèle numérique de surface
[Termes IGN] modèle numérique de terrain
[Termes IGN] précision des données
[Termes IGN] réalité de terrain
[Termes IGN] simulation Pleiades
[Termes IGN] Toulouse
[Termes IGN] valeur aberranteRésumé : (Auteur) In this paper, we present an automatic method for deriving Digital Terrain Models (DTM) from Digital Surface Models (DSM). The DTM generation is formalized here as the minimization of a given energy, defined by a data term and a regularization term. The main contribution of this paper lies in the specific module, introduced in the data term in order to filter outliers (non ground points present in the original DSM) so that the final terrain surface best fits true ground points (inliers). The method is here introduced and tested on a vegetated and hilly area. A comparison to ground truth is also performed and shows the geometric accuracy and the robustness of the approach. Numéro de notice : C2009-046 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1109/ICIP.2009.5413875 Date de publication en ligne : 17/02/2010 En ligne : https://doi.org/10.1109/ICIP.2009.5413875 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64295 Documents numériques
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Automatic estimation of fine terrain models ... - pdf auteurAdobe Acrobat PDF
Titre : Heuristic revision by heuristic space exploration Type de document : Article/Communication Auteurs : Patrick Taillandier , Auteur Editeur : New York : Institute of Electrical and Electronics Engineers IEEE Année de publication : 2009 Conférence : KSE 2009, International Conference on Knowledge and Systems Engineering 13/10/2009 17/10/2009 Hanoï Viet Nam Proceedings IEEE Importance : pp 55 - 60 Note générale : bibliographie Langues : Français (fre) Descripteur : [Termes IGN] méthode heuristique
[Vedettes matières IGN] GénéralisationRésumé : (auteur) Heuristics are often used to solve complex problems. Indeed, such problem-specific knowledge, when pertinent, helps to efficiency find good solutions to complex problems. Unfortunately, acquiring and maintaining a heuristic set can be fastidious. In order to face this problem, an approach consists in revising the heuristic sets by means of experiments. In this paper, we are interested in a specific revision method of this type based on the exploration of the heuristic space. The principle of this method is to revise the heuristic set by searching among all possible heuristics the ones that maximize an evaluation function. In this context, we propose a revision approach, dedicated to heuristics represented by production rules, based on the reduction of the search space and on a filtered local search. We present an experiment we carried out in an application domain where heuristics are widely used: cartographic generalization. Numéro de notice : C2009-065 Affiliation des auteurs : COGIT (1988-2011) Autre URL associée : vers HAL Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1109/KSE.2009.31 Date de publication en ligne : 28/12/2009 En ligne : https://doi.org/10.1109/KSE.2009.31 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102370 Using belief theory to diagnose control knowledge quality: Application to cartographic generalisation / Patrick Taillandier (2009)PermalinkAutomatic registration of optical images, a stake for future missions: Application to ortho-rectification, time series and mosaic products / Simon Baillarin (2008)PermalinkTerrain modeling from lidar data: Hierarchical K-means filtering and Markovian regularization / Nesrine Chehata (2008)PermalinkPermalinkPermalinkAutomatic extraction of urban vegetation structures from high resolution imagery and digital elevation models / Corina Iovan (2007)PermalinkAutomatic man-made object extraction and 3D scene reconstruction from geomatic-images; Is there still a long way to go? / Nicolas Paparoditis (2007)PermalinkProcessing fine digital terrain models by Markovian regularization from 3D airborne lidar data / Frédéric Bretar (2007)PermalinkPermalinkPermalink