On a spectral method for forward gravity field modelling

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

On a spectral method for forward gravity field modelling

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

On a spectral method for forward gravity field modelling

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DE - Zemský magnetismus, geodesie, geografie

OECD FORD obor

—

Projekt

<a href="/cs/project/GA15-08045S" target="_blank" >GA15-08045S: Metody validace, zpracování a použití dat družicových misí v geodézii a geofyzice</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

JOURNAL OF GEODYNAMICS

ISSN

0264-3707

e-ISSN

—

Svazek periodika

97

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

22-30

Kód UT WoS článku

000377313100003

EID výsledku v databázi Scopus

2-s2.0-84960834471