On a spectral method for forward gravity field modelling

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F16%3A43928181" target="_blank" >RIV/49777513:23520/16:43928181 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.jog.2016.02.008" target="_blank" >http://dx.doi.org/10.1016/j.jog.2016.02.008</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jog.2016.02.008" target="_blank" >10.1016/j.jog.2016.02.008</a>

Result language
angličtina
Original language name
On a spectral method for forward gravity field modelling
Original language description
This article reviews a spectral forward gravity field modelling method that was initially designed for topographic/isostatic mass reduction. The method transforms 3D spherical density models into gravitational potential fields using a spherical harmonic representation. The binomial series approximation in the approach, which is crucial for computational efieciency, is examined and an error analysis is performed. It is shown that, this method cannot be used for density layers in crustal and upper mantle regions, because it results in large errors in the modelled potential field. Here, a correction is proposed to mitigate this erroneous behaviour. The improved method is benchmarked with a tesseroid gravity field modelling method and is shown to be accurate within 4 mGal for a layer representing the Moho density interface, which is below other errors in gravity field studies. After the proposed adjustment the method can be used in global gravity modelling of the complete Earth's density structure.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DE - Earth magnetism, geodesy, geography
OECD FORD branch
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Project
<a href="/en/project/GA15-08045S" target="_blank" >GA15-08045S: Methods for validation, analysis and application of data from satellite missions in geodesy and geophysics</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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