Correlation Modeling of the Gravity Field in Classical Geodesy

  • Christopher Jekeli
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The spatial correlation of the Earth’s gravity field is well known and widely utilized in applications of geophysics and physical geodesy. This paper develops the mathematical theory of correlation functions, as well as covariance functions under a statistical interpretation of the field, for functions and processes on the sphere and plane, with formulation of the corresponding power spectral densities in the respective frequency domains and with extensions into the third dimension for harmonic functions. The theory is applied, in particular, to the disturbing gravity potential with consistent relationships of the covariance and power spectral density to any of its spatial derivatives. An analytic model for the covariance function of the disturbing potential is developed for both spherical and planar application, which has analytic forms also for all derivatives in both the spatial and the frequency domains (including the along-track frequency domain). Finally, a method is demonstrated to determine the parameters of this model from empirical regional power spectral densities of the gravity anomaly.


Correlation Function Power Spectral Density Covariance Function Gravitational Field Vertical Derivative 
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© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Division of Geodetic Science, School of Earth Sciences, Ohio State UniversityColumbus, OHUSA

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