1990
DOI: 10.1111/j.1365-246x.1990.tb00701.x
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The use of FFT techniques in physical geodesy

Abstract: The fast Fourier transform (FFT) technique is a very powerful tool for the efficient evaluation of gravity field convolution integrals. It can handle heterogeneous and noisy data, and thus presents a very attractive alternative to the classical, time consuming approaches, provided gridded data are available. This paper reviews the mathematics of the FFT methods as well as their practical problems, and presents examples from physical geodesy where the application of these methods is especially advantageous. The… Show more

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Cited by 298 publications
(127 citation statements)
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“…A significant reduction of computation time can be achieved by applying fast Fourier transform techniques (cf. Forsberg, 1985;Schwarz et al, 1990;Klose and Ilk, 1993). The price to be paid is a decreasing accuracy when the bounding surface is too rough.…”
Section: Introductionmentioning
confidence: 99%
“…A significant reduction of computation time can be achieved by applying fast Fourier transform techniques (cf. Forsberg, 1985;Schwarz et al, 1990;Klose and Ilk, 1993). The price to be paid is a decreasing accuracy when the bounding surface is too rough.…”
Section: Introductionmentioning
confidence: 99%
“…A thorough description of the computational process of power spectra of gravity related quantities is given in Flury (2006) and Schwarz et al (1990), therefore only some basic relations are repeated.…”
Section: Spectral Analysis Methodsmentioning
confidence: 99%
“…In this sense geoid determined from gravity data could not be considered as a fully EGM2008 independent quantity since gravity from EGM2008 was utilized outside the border of the country, however our investigations regarding the covariance analysis rely exclusively to the previously selected rectangular test area in the central part of the country. The ACF of gravimetric geoid height was computed by radially averaging the isotrop 2D planar ACF obtained by spectral method (Schwarz et al 1990). For comparison EGM2008 geoid height covariances was also derived with spectral content of l,m = 600 2160.…”
Section: Covariance Analysismentioning
confidence: 99%
“…Dentre esses modelos podemos citar a aplicação da integral de Stokes (Heiskanen & Moritz, 1967), com o método de colocação por mínimos quadrados (Moritz, 1980) ou com a transformada de Fourier (Schwarz et al, 1989). Essas técnicas baseiam-se em relações funcionais e/ou estocásticas entre anomalias ar livre e ondulações geoidais.…”
Section: Introductionunclassified