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A low‐cost open‐source workflow to generate georeferenced 3D SfM photogrammetric models of rocky outcrops / Laurent Froideval in Photogrammetric record, vol 34 n° 168 (December 2019)  

Public [article]  inPhotogrammetric record > vol 34 n° 168 (December 2019) . - pp 365 - 384 Titre : A low‐cost open‐source workflow to generate georeferenced 3D SfM photogrammetric models of rocky outcrops Type de document : Article/Communication Auteurs : Laurent Froideval, Auteur ; Kevin Pedoja, Auteur ; Franck Garestier, Auteur ; et al., Auteur Année de publication : 2019 Article en page(s) : pp 365 - 384 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] falaise [Termes IGN] front rocheux [Termes IGN] géoréférencement [Termes IGN] GNSS en mode différentiel [Termes IGN] image captée par drone [Termes IGN] logiciel libre [Termes IGN] modélisation 3D [Termes IGN] Normandie (région 2016) [Termes IGN] Open MVG [Termes IGN] point d'appui [Termes IGN] structure-from-motion Résumé : (auteur) Structure‐from‐Motion (SfM) software and unmanned aerial vehicles (UAVs) have been increasingly adopted in the geosciences. The current mainstream generation of 3D models is still expensive as it relies on UAVs, Differential Global Navigation Satellite System (DGNSS) ground control points and commercial software. This paper proposes an end‐to‐end reproducible SfM workflow with minimal legal, financial or field issues. The procedure avoids both UAVs and DGNSS and relies on open‐source software. Interlocked models of a rocky shore in Normandy, France were generated at different scales and point densities, being georeferenced using free spatial data. A spherical target was used for scaling and assessing the relative accuracy, which was better than 1 cm. Numéro de notice : A2019-576 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/phor.12297 Date de publication en ligne : 27/11/2019 En ligne : https://doi.org/10.1111/phor.12297 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=94459 [article]

Ionospheric and receiver DCB-constrained multi-GNSS single-frequency PPP integrated with MEMS inertial measurements / Zhouzheng Gao in Journal of geodesy, vol 91 n° 11 (November 2017)  

Public [article]  inJournal of geodesy > vol 91 n° 11 (November 2017) . - pp 1351 – 1366 Titre : Ionospheric and receiver DCB-constrained multi-GNSS single-frequency PPP integrated with MEMS inertial measurements Type de document : Article/Communication Auteurs : Zhouzheng Gao, Auteur ; Maorong Ge, Auteur ; Wenbin Shen, Auteur ; et al., Auteur Année de publication : 2017 Article en page(s) : pp 1351 – 1366 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] coordonnées GNSS [Termes IGN] erreur instrumentale [Termes IGN] erreur systématique [Termes IGN] filtre de Kalman [Termes IGN] GNSS en mode différentiel [Termes IGN] GPS-INS [Termes IGN] intégration de données [Termes IGN] perturbation ionosphérique [Termes IGN] positionnement ponctuel précis [Termes IGN] récepteur monofréquence [Termes IGN] retard ionosphèrique Résumé : (Auteur) Single-frequency precise point positioning (SF-PPP) is a potential precise positioning technique due to the advantages of the high accuracy in positioning after convergence and the low cost in operation. However, there are still challenges limiting its applications at present, such as the long convergence time, the low reliability, and the poor satellite availability and continuity in kinematic applications. In recent years, the achievements in the dual-frequency PPP have confirmed that its performance can be significantly enhanced by employing the slant ionospheric delay and receiver differential code bias (DCB) constraint model, and the multi-constellation Global Navigation Satellite Systems (GNSS) data. Accordingly, we introduce the slant ionospheric delay and receiver DCB constraint model, and the multi-GNSS data in SF-PPP modular together. In order to further overcome the drawbacks of SF-PPP in terms of reliability, continuity, and accuracy in the signal easily blocking environments, the inertial measurements are also adopted in this paper. Finally, we form a new approach to tightly integrate the multi-GNSS single-frequency observations and inertial measurements together to ameliorate the performance of the ionospheric delay and receiver DCB-constrained SF-PPP. In such model, the inter-system bias between each two GNSS systems, the inter-frequency bias between each two GLONASS frequencies, the hardware errors of the inertial sensors, the slant ionospheric delays of each user-satellite pair, and the receiver DCB are estimated together with other parameters in a unique Kalman filter. To demonstrate its performance, the multi-GNSS and low-cost inertial data from a land-borne experiment are analyzed. The results indicate that visible positioning improvements in terms of accuracy, continuity, and reliability can be achieved in both open-sky and complex conditions while using the proposed model in this study compared to the conventional GPS SF-PPP. Numéro de notice : A2017-706 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-017-1029-7 En ligne : https://doi.org/10.1007/s00190-017-1029-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=88087 [article]

Understanding GPS/GNSS / Elliott D. Kaplan (2017) 

Public Titre : Understanding GPS/GNSS : principles and applications Type de document : Monographie Auteurs : Elliott D. Kaplan, Éditeur scientifique ; Christopher Hegarty, Éditeur scientifique Mention d'édition : Third edition Editeur : Londres, Washington : Artech House Année de publication : 2017 Collection : GNSS Technology and applications series Importance : 993 p. Format : 18 x 26 cm ISBN/ISSN/EAN : 978-1-63081-058-0 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] BeiDou [Termes IGN] erreur de positionnement [Termes IGN] Galileo [Termes IGN] Global Orbitography Navigation Satellite System [Termes IGN] Global Positioning System [Termes IGN] GNSS en mode différentiel [Termes IGN] mesurage par GNSS [Termes IGN] positionnement ponctuel précis [Termes IGN] récepteur GNSS Index. décimale : 30.61 Systèmes de Positionnement par Satellites du GNSS Résumé : (Editeur) This updated third edition provides a current and comprehensive treatment of global navigation satellite systems (GNSS) and includes new chapters on the system engineering details of GPS, European Galileo system, Chinese Beidou systems, GLONASS, and regional systems. The book contains material on the system engineering details of GPS, European Galileo system, Chinese Beidou systems, GLONASS, Quasi-Zenith Satellite System (QZSS) and Navigation with Indian Constellation (NavIC) and investigates the integration of GNSS with other sensors and network assistance. Numéro de notice : 26395 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Recueil / ouvrage collectif Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=96084

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GNSS / Scott Gleason (2009)

Public Titre : GNSS : applications and methods Type de document : Monographie Auteurs : Scott Gleason, Éditeur scientifique ; Demoz Gebre-Egziabher, Éditeur scientifique Editeur : Londres, Washington : Artech House Année de publication : 2009 Collection : GNSS Technology and applications series Importance : 508 p. Format : 18 x 26 cm - cont. 1 DVD ISBN/ISSN/EAN : 978-1-59693-329-3 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] BeiDou [Termes IGN] centrale inertielle [Termes IGN] détection du signal [Termes IGN] Galileo [Termes IGN] géodésie spatiale [Termes IGN] Global Navigation Satellite System [Termes IGN] Global Positioning System [Termes IGN] GNSS assisté pour la navigation [Termes IGN] GNSS en mode différentiel [Termes IGN] GPS-INS [Termes IGN] interférence [Termes IGN] logiciel de post-traitement GPS [Termes IGN] LORAN (système) [Termes IGN] navigation aérienne [Termes IGN] navigation inertielle [Termes IGN] navigation spatiale [Termes IGN] occultation du signal [Termes IGN] positionnement différentiel [Termes IGN] positionnement en intérieur [Termes IGN] positionnement par GNSS [Termes IGN] poursuite de satellite [Termes IGN] radiofréquence [Termes IGN] récepteur GPS [Termes IGN] signal GNSS [Termes IGN] simulation [Termes IGN] système de numérisation mobile [Termes IGN] traitement du signal [Termes IGN] transmission de données Résumé : (Editeur) Over the past few years, the growth of GNSS applications has been staggering. And, this trend promises to continue in the foreseeable future. Placing emphasis on applications development, this unique resource offers a highly practical overview of GNSS (global navigation satellite systems), including GPS. The applications presented in the book range from the traditional location applications to combining GNSS with other sensors and systems and into more exotic areas, such as remote sensing and space weather monitoring. Written by leading experts in the field, this book presents the fundamental underpinnings of GNSS and provides you with detailed examples of various GNSS applications. Moreover, the software included with the book contains valuable processing tools and real GPS data sets to help you rapidly advance your own work in the field. You will find critical information and tools that help give you a head start to embark on future research and development projects. Note de contenu : - Introduction. - GNSS Signal Acquisition and Tracking. - Position, Velocity and Time Estimation. - Differential GNSS: Accuracy and Integrity. - A GPS Software Receiver. - Integration of GNSS and INS. - GNS/INS Case Studies. - Integrated LADAR, INS and GNSS Navigation. - Combining GNSS with RF Systems. - Aviation Applications. - Integrated GNSS and Loran Systems. - Indoor and Weak Signal Navigation. - Space Applications. - Geodesy and Surveying. - Atmospheric Sensing Using GNSS. - Remote Sensing Using Bistatic GNSS Reflections. - Epilogue. - New Navigation Signals and Future Systems in Evolution. Numéro de notice : 20459 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=63026

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