Regional recovery of the disturbing gravitational potential by inverting satellite gravitational gradients

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F16%3A43927095" target="_blank" >RIV/49777513:23520/16:43927095 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1093/gji/ggw008" target="_blank" >http://dx.doi.org/10.1093/gji/ggw008</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/gji/ggw008" target="_blank" >10.1093/gji/ggw008</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Regional recovery of the disturbing gravitational potential by inverting satellite gravitational gradients

Popis výsledku v původním jazyce

Regional recovery of the disturbing gravitational potential in the area of Central Europe from satellite gravitational gradients data is discussed in this contribution. The disturbing gravitational potential is obtained by inverting surface integral formulas which transform the disturbing gravitational potential onto disturbing gravitational gradients in the spherical local north-oriented frame. Two numerical approaches that solve the inverse problem are considered. In the first approach, the integral formulas are rigorously decomposed into two parts, i.e., the effects of gradient data within near and distant zones. While the effect of the near zone is sought as an inverse problem, the effect of the distant zone is synthesized from the global gravitational model GGM05S using spectral weights given by truncation error coefficients up to the degree 150. In the second approach, a reference gravitational field up to the degree 180 is applied to reduce and smooth measured gravitational gradients. In both cases we recovered the disturbing gravitational tensor from each of the four well-measured gravitational gradients separately as well as from their combination. Obtained results are compared with the EGM2008, DIR-r2, TIM-r2 and SPW-r2 global gravitational models. The best fit was achieved for EGM08 and the second approach combining all four well-measured gravitational gradients.

Název v anglickém jazyce

Regional recovery of the disturbing gravitational potential by inverting satellite gravitational gradients

Popis výsledku anglicky

Regional recovery of the disturbing gravitational potential in the area of Central Europe from satellite gravitational gradients data is discussed in this contribution. The disturbing gravitational potential is obtained by inverting surface integral formulas which transform the disturbing gravitational potential onto disturbing gravitational gradients in the spherical local north-oriented frame. Two numerical approaches that solve the inverse problem are considered. In the first approach, the integral formulas are rigorously decomposed into two parts, i.e., the effects of gradient data within near and distant zones. While the effect of the near zone is sought as an inverse problem, the effect of the distant zone is synthesized from the global gravitational model GGM05S using spectral weights given by truncation error coefficients up to the degree 150. In the second approach, a reference gravitational field up to the degree 180 is applied to reduce and smooth measured gravitational gradients. In both cases we recovered the disturbing gravitational tensor from each of the four well-measured gravitational gradients separately as well as from their combination. Obtained results are compared with the EGM2008, DIR-r2, TIM-r2 and SPW-r2 global gravitational models. The best fit was achieved for EGM08 and the second approach combining all four well-measured gravitational gradients.

Druh

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

CEP obor

DE - Zemský magnetismus, geodesie, geografie

OECD FORD obor

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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

GEOPHYSICAL JOURNAL INTERNATIONAL

ISSN

0956-540X

e-ISSN

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Svazek periodika

205

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

89-98

Kód UT WoS článku

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EID výsledku v databázi Scopus

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