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Hybrid BD / GPS positioning for deformation monitoring under denied environments / Zhenzhong Peng in Journal of applied geodesy, vol 10 n° 3 (September 2016)  

Public [article]  inJournal of applied geodesy > vol 10 n° 3 (September 2016) . - pp 159 – 166 Titre : Hybrid BD / GPS positioning for deformation monitoring under denied environments Type de document : Article/Communication Auteurs : Zhenzhong Peng, Auteur ; Qianxia Li, Auteur ; Linyuan Xia, Auteur Année de publication : 2016 Article en page(s) : pp 159 – 166 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Topographie [Termes IGN] analyse de sensibilité [Termes IGN] auscultation d'ouvrage [Termes IGN] barrage [Termes IGN] optimisation spatiale [Termes IGN] positionnement par BeiDou [Termes IGN] positionnement par GNSS [Termes IGN] positionnement par GPS [Termes IGN] surveillance d'ouvrage [Termes IGN] surveillance géologique [Termes IGN] topométrie de précision Résumé : (auteur) In the era of multiple satellite navigation and positioning, there are still many remained issues to be tackled in order to satisfy varied applications for various sectors. These include availability, accuracy, integrity, vulnerability and others. To explore feasibility of deformation monitoring under dam and steep slope environments, we investigated features of hybrid BD / GPS positioning and monitoring performance. Results indicate that hybrid satellites can further facilitate precise positioning for deformation monitoring on restricted regions. A static network in near real time mode is designed to exhibit essential sensitivity for deformation monitoring under different network connectivity. Analysis shows that under given network design matrix, contributions from hybrid BD / GPS have enhanced network sensitivity and ensured monitoring performance under challenged scenarios. Related tests combining with application to stringent dam monitoring have been conducted to exemplify sensitivity changes along vital engineering directions and optimal schemes for network configuration. Numéro de notice : A2016-969 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article En ligne : https://doi.org/10.1515/jag-2016-0002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83675 [article]

A remark on the GNSS single difference model with common clock scheme for attitude determination / Wantong Chen in Journal of applied geodesy, vol 10 n° 3 (September 2016)  

Public [article]  inJournal of applied geodesy > vol 10 n° 3 (September 2016) . - pp 167 – 173 Titre : A remark on the GNSS single difference model with common clock scheme for attitude determination Type de document : Article/Communication Auteurs : Wantong Chen, Auteur Année de publication : 2016 Article en page(s) : pp 167 – 173 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] antenne GNSS [Termes IGN] erreur de phase [Termes IGN] erreur systématique [Termes IGN] horloge [Termes IGN] orientation du capteur [Termes IGN] phase GNSS [Termes IGN] simple différence Résumé : (auteur) GNSS-based attitude determination technique is an important field of study, in which two schemes can be used to construct the actual system: the common clock scheme and the non-common clock scheme. Compared with the non-common clock scheme, the common clock scheme can strongly improve both the reliability and the accuracy. However, in order to gain these advantages, specific care must be taken in the implementation. The cares are thus discussed, based on the generating technique of carrier phase measurement in GNSS receivers. A qualitative assessment of potential phase bias contributes is also carried out. Possible technical difficulties are pointed out for the development of single-board multi-antenna GNSS attitude systems with a common clock. Numéro de notice : A2016-970 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article En ligne : https://doi.org/10.1515/jag-2016-0008 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83677 [article]

Some equal-area, conformal and conventional map projections: a tutorial review / Ebrahim Ghaderpour in Journal of applied geodesy, vol 10 n° 3 (September 2016)  

Public [article]  inJournal of applied geodesy > vol 10 n° 3 (September 2016) . - pp 197 – 209 Titre : Some equal-area, conformal and conventional map projections: a tutorial review Type de document : Article/Communication Auteurs : Ebrahim Ghaderpour, Auteur Année de publication : 2016 Article en page(s) : pp 197 – 209 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Projections [Termes IGN] projection conforme [Termes IGN] projection de Gauss [Termes IGN] projection équivalente [Termes IGN] projection Universal Transverse Mercator Résumé : (auteur) Map projections have been widely used in many areas such as geography, oceanography, meteorology, geology, geodesy, photogrammetry and global positioning systems. Understanding different types of map projections is very crucial in these areas. This paper presents a tutorial review of various types of current map projections such as equal-area, conformal and conventional. We present these map projections from a model of the Earth to a flat sheet of paper or map and derive the plotting equations for them in detail. The first fundamental form and the Gaussian fundamental quantities are defined and applied to obtain the plotting equations and distortions in length, shape and size for some of these map projections. Numéro de notice : A2016-971 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article En ligne : https://doi.org/10.1515/jag-2015-0033 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83678 [article]