Representation of three-dimensional mass distribution of the Earth's interior by biorthogonal series and its use for studying internal structure of the planet  

作　　者：Mykhailo Fys Mariana Yurkiv Andrii Brydun Andrii Sohor 

机构地区：[1]Department of Cartography and Geospatial Modelling,Lviv Polytechnic National University,Lviv 79013,Ukraine

出　　处：《Geodesy and Geodynamics》2024年第3期264-275,共12页大地测量与地球动力学（英文版）

摘　　要：This paper utilizes the mathematical concept of approximation within an ellipsoid from a single viewpoint to present the spatial mass distribution function of the Earth's interior and its internal potential.The primary focus lies in constructing the volume distribution of masses in the planet's interior, with the expansion coefficients being linear combinations of the Stokes constants. Several possible approaches are suggested for determining accurately these coefficients employing three-dimensional(biorthogonal)polynomials. By expressing the mass distribution function of the Earth's interior and its internal potential as a series, an algorithm is introduced for the calculation of gravitational energy. It allows us to estimate fluctuations in gravitational energy. The implementation of this algorithm offers the means of establishing the extent to which the Earth deviates from a state of hydrostatic equilibrium as a celestial body.Due to the aforementioned method, calculations have been conducted to validate its effectiveness and reliability. This example is given as an illustration of a given method for studying the internal structure of planets.

关 键 词：Mass distribution function Potential Stokes constants Biorthogonal polynomials 

分 类 号：P542[天文地球—构造地质学] P22[天文地球—地质学]