Analytical and numerical methods for calculating the gravitational signal of known distributions at different scales
Abstract
The main objective of the present PhD thesis is the evaluation of different mathematical techniques for computing the gravitational signal of finite mass distributions at different scales. Special emphasis is given on applying those theoretical approaches for the dynamic modelling of time varying gravity fields. The modelling of mass changes that lead to gravity changes, especially the last decades with the increasing amount of satellite and terrestrial gravimetric observations, has been established as one of the main and most challenging purposes of the geophysical community. Specifically, the analytical methods of a general polyhedron and a right rectangular parallelepiped, as well as the spherical harmonic expansions of polyhedral distributions using Legendre and Gottlieb methods, are evaluated. The computation of the involved spherical harmonic coefficients is performed by applying the recursive scheme of Werner as well as the line integral method. Thereby, a stochastic analysis pr ...
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