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Elementary potentials and Galerkin?s matrix for an ellipsoidal domain in the recovery of the gravity field
Holota, Petr ; Nesvadba, Otakar



Publication type: audiovizuální tvorba

Link: http://www.czech-in.org/cmdownload/IUGG2015/presentations/IUGG-5236.pdf
Annotation:
The motivation comes from the role of boundary value problems in Earth?s gravity field studies. The focus is on Neumann?s problem in the exterior of an oblate ellipsoid of revolution. The approach follows the concept of variational methods and the notionof the weak solution. The solution of the problem is approximated by linear combinations of basis functions with scalar coefficients, i.e. by Galerkin approximations. The aim is to discuss the construction of Galerkin?s matrix for elementary potentialsused in quality of a function basis. The computation of the entries of Galerkin?s matrix is expected to be simple for the elementary functions like these. Nevertheless, the opposite is true. Ellipsoidal harmonics are applied as a natural tool. The problem, however, is the summation of the series that represent the entries. It is difficult to reduce the number of summation indices since in the ellipsoidal case there is no analogue to the addition theorem known for spherical harmonics.

Citation: HOLOTA, Petr a Otakar NESVADBA. Elementary potentials and Galerkin?s matrix for an ellipsoidal domain in the recovery of the gravity field [online]. In: . Praha: International Union Of Geodesy and Geophysics, 2015 [cit. 2018-12-20]. Dostupné z: http://www.czech-in.org/cmdownload/IUGG2015/presentations/IUGG-5236.pdf

The record appears in these collections:
Focus on VÚGTK > VÚGTK Departments > Geodesy and Geodynamics
Focus on VÚGTK > Staff VÚGTK > Otakar Nesvadba
Focus on VÚGTK > Staff VÚGTK > Petr Holota
Documents of VÚGTK > Articles VÚGTK
Focus on VÚGTK > RIV

 Record created 2018-11-15, last modified 2018-12-20


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