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Sea level acceleration under the magnifier / Huseyin Baki Iz in Journal of geodetic science, vol 11 n° 1 (January 2021)  

Public [article]  inJournal of geodetic science > vol 11 n° 1 (January 2021) . - pp 7 - 13 Titre : Sea level acceleration under the magnifier Type de document : Article/Communication Auteurs : Huseyin Baki Iz, Auteur Année de publication : 2021 Article en page(s) : pp 7 - 13 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique [Termes IGN] changement climatique [Termes IGN] contrôle statistique [Termes IGN] données marégraphiques [Termes IGN] Floride (Etats-Unis) [Termes IGN] montée du niveau de la mer [Termes IGN] niveau de la mer [Termes IGN] positionnement cinématique [Termes IGN] résidu Résumé : (auteur) Detection and quantification of sea level accelerations at tide gauge stations are needed for assessing anthropogenic contributions to the climate change. Nonetheless, uniform or non-uniform sea level accelerations/decelerations are particularly difficult to discern partly because of their small magnitudes and partly because of the low frequency sea level variations as confounders. Moreover, noisy excursions in the observed sea level variations also exacerbate reliability of estimated sea level accelerations. This study explores the uniformity of a sea level acceleration graphically that is left unmodeled in the residuals of a least squares solution using cumulative sum charts. Key West, USA tide gauge station’s record is studied for a demonstration. The cumulative sum charts of the residuals of a rigorous kinematic model solution without the acceleration parameter revealed its crisp and uniform signature experienced at this station since 1913. Numéro de notice : A2021-437 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1515/jogs-2020-0118 Date de publication en ligne : 24/05/2021 En ligne : https://doi.org/10.1515/jogs-2020-0118 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=97813 [article]

Statistical analysis of two 3-D registration and modeling strategies / O. Jokinen in ISPRS Journal of photogrammetry and remote sensing, vol 53 n° 6 (November - December 1998)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 53 n° 6 (November - December 1998) . - pp 320 - 341 Titre : Statistical analysis of two 3-D registration and modeling strategies Type de document : Article/Communication Auteurs : O. Jokinen, Auteur ; Henrik Haggren, Auteur Année de publication : 1998 Article en page(s) : pp 320 - 341 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] contrôle statistique [Termes IGN] matrice de covariance [Termes IGN] modélisation 3D [Termes IGN] propagation d'erreur [Termes IGN] superposition d'images [Termes IGN] test statistique Résumé : (Auteur) The paper deals with the registration and modeling of multiple 3-D profile maps acquired from different viewpoints by light striping. We analyze the propagation of measurement and calibration errors to the registration parameters and further to the reconstructed model of the scene consisting of planar patches. The analysis is performed for two strategies. In the first strategy, the maps are registered simultaneously using the Levenberg-Marquardt method to update the registration parameters and the model computed afterwards while in the second one, the maps are registered sequentially against the model reconstructed up till then using the method of unit quatemions to update the registration parameters. Our statistical analysis thus combines the registration and modeling steps, and in registration, we determine the corresponding points either on the parametric domains of the maps or as closest points in 3-D using the information from the parametric domain to restrict the search for the closest points. We also point out the precise estimation of the covariance matrix of the solution given by the Levenberg-Marquardt method. We illustrate the results of our analysis with real data from a scale model of an urban area. Copyright ISPRS Numéro de notice : A1998-245 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(98)00017-3 En ligne : https://doi.org/10.1016/S0924-2716(98)00017-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29437 [article]

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