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Coordination de la surveillance géodésique de Mayotte [diaporama] / Sébastien Saur (2019)    

Public Titre : Coordination de la surveillance géodésique de Mayotte [diaporama] Type de document : Article/Communication Auteurs : Sébastien Saur , Auteur Editeur : Saint-Mandé : Institut national de l'information géographique et forestière - IGN (2012-) Année de publication : 2019 Conférence : RESIF 2019, 4es rencontres scientifiques et techniques du Réseau sismologique et géodésique français 12/11/2019 14/11/2019 Biarritz France Open Access Proceedings Langues : Français (fre) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] Mayotte [Termes IGN] réseau de surveillance géophysique [Termes IGN] réseau géodésique de Mayotte 2004 [Termes IGN] surveillance géologique Numéro de notice : C2019-059 Affiliation des auteurs : IGN (2012-2019) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésNat DOI : sans En ligne : https://rst-resif-19.sciencesconf.org/data/program/Saur_GNSS_Mayotte.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=96914

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Influences of environmental loading corrections on the nonlinear variations and velocity uncertainties for the reprocessed global positioning system height time series of the crustal movement observation network of China / Peng Yuan in Remote sensing, vol 10 n° 6 (June 2018)    

Public [article]  inRemote sensing > vol 10 n° 6 (June 2018) Titre : Influences of environmental loading corrections on the nonlinear variations and velocity uncertainties for the reprocessed global positioning system height time series of the crustal movement observation network of China Type de document : Article/Communication Auteurs : Peng Yuan, Auteur ; Zhao Li, Auteur ; Weiping Jiang, Auteur ; Yifang Ma , Auteur ; Wu Chen, Auteur ; Nico Sneeuw, Auteur Année de publication : 2018 Projets : 1-Pas de projet / Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] analyse en composantes principales [Termes IGN] champ de vitesse [Termes IGN] Chine [Termes IGN] coordonnées GPS [Termes IGN] correction géométrique [Termes IGN] données GPS [Termes IGN] réseau de surveillance géophysique [Termes IGN] série temporelle [Termes IGN] station permanente Résumé : (auteur) Mass redistribution of the atmosphere, oceans, and terrestrial water storage generates crustal displacements which can be predicted by environmental loading models and observed by the Global Positioning System (GPS). In this paper, daily height time series of 235 GPS stations derived from a homogeneously reprocessed Crustal Movement Observation Network of China (CMONOC) and corresponding loading displacements predicted by the Deutsche GeoForschungsZentrum (GFZ) are compared to assess the effects of loading corrections on the nonlinear variations of GPS time series. Results show that the average root mean square (RMS) of vertical displacements due to atmospheric, nontidal oceanic, hydrological, and their combined effects are 3.2, 0.6, 2.7, and 4.0 mm, respectively. Vertical annual signals of loading and GPS are consistent in amplitude but different in phase systematically. The average correlation coefficient between loading and GPS height time series is 0.6. RMS of the GPS height time series are reduced by 20% on average. Moreover, an investigation of 208 CMONOC stations with observing time spans of ~4.6 years shows that environmental loading corrections lead to an overestimation of the GPS velocity uncertainty by about 1.4 times on average. Nevertheless, by using a common mode component filter through principal component analysis, the dilution of velocity precision due to environmental loading corrections can be compensated. Numéro de notice : A2018-658 Affiliation des auteurs : LASTIG LAREG+Ext (2012-mi2018) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.3390/rs10060958 Date de publication en ligne : 15/06/2018 En ligne : https://doi.org/10.3390/rs10060958 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93811 [article]

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Optimization of deformation monitoring networks using finite element strain analysis / M. Amin Alizadeh-Khameneh in Journal of applied geodesy, vol 12 n° 2 (April 2018)  

Public [article]  inJournal of applied geodesy > vol 12 n° 2 (April 2018) . - pp Titre : Optimization of deformation monitoring networks using finite element strain analysis Type de document : Article/Communication Auteurs : M. Amin Alizadeh-Khameneh, Auteur ; Mehdi Eshagh, Auteur ; Anna B. O. Jensen, Auteur Année de publication : 2018 Article en page(s) : pp Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes IGN] extensométrie [Termes IGN] faille géologique [Termes IGN] méthode des éléments finis [Termes IGN] réseau de surveillance géophysique [Termes IGN] Suède [Termes IGN] surveillance géologique [Termes IGN] triangulation de Delaunay Résumé : (auteur) An optimal design of a geodetic network can fulfill the requested precision and reliability of the network, and decrease the expenses of its execution by removing unnecessary observations. The role of an optimal design is highlighted in deformation monitoring network due to the repeatability of these networks. The core design problem is how to define precision and reliability criteria. This paper proposes a solution, where the precision criterion is defined based on the precision of deformation parameters, i. e. precision of strain and differential rotations. A strain analysis can be performed to obtain some information about the possible deformation of a deformable object. In this study, we split an area into a number of three-dimensional finite elements with the help of the Delaunay triangulation and performed the strain analysis on each element. According to the obtained precision of deformation parameters in each element, the precision criterion of displacement detection at each network point is then determined. The developed criterion is implemented to optimize the observations from the Global Positioning System (GPS) in Skåne monitoring network in Sweden. The network was established in 1989 and straddled the Tornquist zone, which is one of the most active faults in southern Sweden. The numerical results show that 17 out of all 21 possible GPS baseline observations are sufficient to detect minimum 3 mm displacement at each network point. Numéro de notice : A2018-175 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/jag-2017-0040 Date de publication en ligne : 28/03/2018 En ligne : https://doi.org/10.1515/jag-2017-0040 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89811 [article]

Geodetic monitoring of subrosion-induced subsidence processes in urban areas / Tobias Kersten in Journal of applied geodesy, vol 11 n° 1 (March 2017)  

Public [article]  inJournal of applied geodesy > vol 11 n° 1 (March 2017) . - pp 21 - 30 Titre : Geodetic monitoring of subrosion-induced subsidence processes in urban areas Type de document : Article/Communication Auteurs : Tobias Kersten, Auteur ; Martin Kobe, Auteur ; Gerald Gabriel, Auteur ; Ludger Timmen, Auteur ; Steffen Schön, Auteur ; Detlef Vogel, Auteur Année de publication : 2017 Article en page(s) : pp 21 - 30 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes IGN] église [Termes IGN] gravimétrie [Termes IGN] Hambourg [Termes IGN] nivellement [Termes IGN] positionnement par GNSS [Termes IGN] réseau de surveillance géophysique [Termes IGN] subsidence [Termes IGN] surveillance géologique [Termes IGN] Thuringe [Termes IGN] tour (bâtiment) [Termes IGN] zone urbaine Résumé : (Résumé) The research project SIMULTAN applies an advanced combination of geophysical, geodetic, and modelling techniques to gain a better understanding of the evolution and characteristics of sinkholes. Sinkholes are inherently related to surface deformation and, thus, of increasing societal relevance, especially in dense populated urban areas. One work package of SIMULTAN investigates an integrated approach to monitor sinkhole-related mass translations and surface deformations induced by salt dissolution. Datasets from identical and adjacent points are used for a consistent combination of geodetic and geophysical techniques. Monitoring networks are established in Hamburg and Bad Frankenhausen (Thuringia). Levelling surveys indicate subsidence rates of about 4–5 mm per year in the main subsidence areas of Bad Frankenhausen with a local maximum of 10 mm per year around the leaning church tower. Here, the concept of combining geodetic and gravimetric techniques to monitor and characterise geological processes on and below the Earth's surface is exemplary discussed for the focus area Bad Frankenhausen. For the different methods (levelling, GNSS, relative/absolute gravimetry) stable network results at identical points are obtained by the first campaigns, i.e., the results are generally in agreement. Numéro de notice : A2017-281 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/jag-2016-0029 En ligne : https://doi.org/10.1515/jag-2016-0029 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=85314 [article]

Multi-sensor cave detection / Tanya Slavova in GIM international, vol 30 n° 3 (March 2016)

Public [article]  inGIM international > vol 30 n° 3 (March 2016) . - pp 24 - 27 Titre : Multi-sensor cave detection Type de document : Article/Communication Auteurs : Tanya Slavova, Auteur ; Atanas Rusev, Auteur Année de publication : 2016 Article en page(s) : pp 24 - 27 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Topographie moderne [Termes IGN] géologie [Termes IGN] karst [Termes IGN] lever souterrain [Termes IGN] positionnement par GNSS [Termes IGN] réseau de surveillance géophysique Résumé : (éditeur) Caves are important in a wide variety of fields, ranging from construction engineering to minerai exploration and archaeology. Despite the scientific importance of caves, geologists believe that only a relatively small number of them have been discovered so far. Exploration is currently mainly conducted by speleologists but this is a time-consuming activity and is limited to exploration based on existing surface openings. The authors of this article show that the combination of multiple geophysical techniques provides an easier and effective on-surface exploration method that meets the challenges of complex karst environments. Numéro de notice : A2016-103 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79928 [article]

GPS and the 2015 Gorkha Earthquake / Mathias Lemmens in GIM international, vol 29 n° 11 (November 2015)

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New data processing strategy for single frequency GPS deformation monitoring / S-Q. Huang in Survey review, vol 47 n° 344 (September 2015)  

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Separation of atmospheric, oceanic and hydrological polar motion excitation mechanisms based on a combination of geometric and gravimetric space observations / F. Göttl in Journal of geodesy, vol 89 n° 4 (April 2015)  

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vol 100 - February 2015 - High-resolution Earth imaging for geospatial information (Bulletin de ISPRS Journal of photogrammetry and remote sensing) / Christian Heipke  

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Algerian augmentation positioning system (SAAP) / Hassen Abdellaoui in Bulletin des sciences géographiques, n° 29 (janvier - juin 2014)

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Automatisation des traitements GNSS par GAMIT / Clément Bouché (2012) 

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Real-time capability of Geonet [GPS Earth Observation Network] system and its application to crust monitoring / A. Yamagiwa in Bulletin of the Geographical survey institute, vol 53 (March 2006)  

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La déformation crustale observée par GPS / Perrine Rouffiac (2002)

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Geophysical surveying of the Western Mediterranean Basin / Gérard Petit (01/05/1992)

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Traitement de la campagne européenne de VLBI mobile 1989 / Noamen Rebaï (1992)  

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