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Titlebook: Geodetic Boundary Value Problem: the Equivalence between Molodensky’s and Helmert’s Solutions; Fernando Sansò,Michael G.‘Sideris Book 2017

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发表于 2025-3-21 19:09:33 | 显示全部楼层 |阅读模式
书目名称Geodetic Boundary Value Problem: the Equivalence between Molodensky’s and Helmert’s Solutions
编辑Fernando Sansò,Michael G.‘Sideris
视频video
概述Shows for the first time the theoretical equivalence of the various geodetic boundary value problems, with and without terrain reductions.Offers a rigorous, alternative interpretation of the usual dow
丛书名称SpringerBriefs in Earth Sciences
图书封面Titlebook: Geodetic Boundary Value Problem: the Equivalence between Molodensky’s and Helmert’s Solutions;  Fernando Sansò,Michael G.‘Sideris Book 2017
描述.This book offers a new approach to interpreting the geodetic boundary value problem, successfully obtaining the solutions of the Molodensky and Stokes boundary value problems (BVPs) with the help of downward continuation (DC) based methods. Although DC is known to be an improperly posed operation, classical methods seem to provide numerically sensible results, and therefore it can be concluded that such classical methods must in fact be manifestations of different, mathematically sound approaches...Here, the authors first prove the equivalence of Molodensky’s and Stoke‘s approaches with Helmert’s reduction in terms of both BVP formulation and BVP solutions by means of the DC method. They then go on to show that this is not merely a downward continuation operation, and provide more rigorous interpretations of the DC approach as a change of boundary approach and as a pseudo BVP solution approach..
出版日期Book 2017
关键词Molodensky‘s Problem; Stokes‘s Problem; Helmert Reduction; Geoid/quasi-Geoid Determination; Analytical/D
版次1
doihttps://doi.org/10.1007/978-3-319-46358-2
isbn_softcover978-3-319-46357-5
isbn_ebook978-3-319-46358-2Series ISSN 2191-5369 Series E-ISSN 2191-5377
issn_series 2191-5369
copyrightThe Author(s) 2017
The information of publication is updating

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发表于 2025-3-21 21:14:55 | 显示全部楼层
On the Linearization Band,on band, namely the possibility to define many linearized Molodensky problems, starting from different zero order approximations, in such a way that they all lead to the same final solution, at least within pre-established error bounds. In doing so, a flaw in the classical linearization procedure ha
发表于 2025-3-22 01:50:13 | 显示全部楼层
On the Equivalent BVPs of Stokes and Helmert, and Their Relations to the Molodensky BVP by Analytict the boundary values and the solutions of the Helmert Molodensky (HM) and Helmert Stokes (HS) BVPs, and show their equivalence when they are related to each other by the so-called “analytical (downward) continuation” process in linear approximation.
发表于 2025-3-22 05:00:50 | 显示全部楼层
发表于 2025-3-22 09:23:19 | 显示全部楼层
The Change of Boundary Approach, the actual complicated boundary to a Bjerhammer sphere, solving the corresponding BVP by a Poisson kernel and then going to residuals. A rigorous proof of convergence of the above method is still lacking, although a fine perturbative analysis conducted in Appendix A seems to answer in positive sens
发表于 2025-3-22 16:14:34 | 显示全部楼层
The Pseudo-Boundary Value Problem (,-BVP) Interpretation,a condition complementary to harmonicity. Such an approach provide, so to say, the solution of an approximate BVP. The analysis shows that this point of view is capable of explaining the good results obtained up to a first order term, in terms of the ratio between height of the surface . on the sphe
发表于 2025-3-22 18:13:54 | 显示全部楼层
One Further Example, Some Remarks and Conclusions,to mimic the effect of a topography by introducing lateral density variations between the two spheres. This still allows analytical continuation solutions and we compare once more Molodensky’s and Helmert’s solutions in terms of DC. The equivalence then comes out quite evidently, showing that if the
发表于 2025-3-23 01:07:49 | 显示全部楼层
发表于 2025-3-23 03:00:33 | 显示全部楼层
,Die Verwendung der künstlichen Seide,on band, namely the possibility to define many linearized Molodensky problems, starting from different zero order approximations, in such a way that they all lead to the same final solution, at least within pre-established error bounds. In doing so, a flaw in the classical linearization procedure ha
发表于 2025-3-23 09:06:49 | 显示全部楼层
Die Indigosole und ihre Verwendungt the boundary values and the solutions of the Helmert Molodensky (HM) and Helmert Stokes (HS) BVPs, and show their equivalence when they are related to each other by the so-called “analytical (downward) continuation” process in linear approximation.
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