The stability criterion for downward continuation of surface gravity data with various spatial resolutions over Ireland

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F21%3A10437066" target="_blank" >RIV/00216208:11320/21:10437066 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=8bQPimk5pL" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=8bQPimk5pL</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11200-020-0769-7" target="_blank" >10.1007/s11200-020-0769-7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The stability criterion for downward continuation of surface gravity data with various spatial resolutions over Ireland

Popis výsledku v původním jazyce

The differences between local and reference geopotential values are the fundamental quantities of interest in the geodetic boundary value problem approach for connecting independent height reference frames. The local gravity potential values are usually derived from gravimetric and geometric geoid undulations. In determining the short-wavelength components of the gravimetric geoid, a harmonic or analytical downward continuation of the external harmonic functions of gravity to the geoid is necessary. This study analyses the stability of the Poisson downward continuation technique with respect to varying the spatial resolution of surface gravity data in Ireland in order to estimate an effective grid resolution on this reduction. Results of the study show that the minimum range of 500-m resolution provides an unconditionally stable solution to downward continuation without the need for regularisation of the computation algorithm. In this case, downward continued data contribute from -13 to 12 mm to geoid heights and from -0.128 to 0.118 m(2)s(-2) to local gravity potential value at Malin-Head tide gauge station in Ireland.

Název v anglickém jazyce

The stability criterion for downward continuation of surface gravity data with various spatial resolutions over Ireland

Popis výsledku anglicky

The differences between local and reference geopotential values are the fundamental quantities of interest in the geodetic boundary value problem approach for connecting independent height reference frames. The local gravity potential values are usually derived from gravimetric and geometric geoid undulations. In determining the short-wavelength components of the gravimetric geoid, a harmonic or analytical downward continuation of the external harmonic functions of gravity to the geoid is necessary. This study analyses the stability of the Poisson downward continuation technique with respect to varying the spatial resolution of surface gravity data in Ireland in order to estimate an effective grid resolution on this reduction. Results of the study show that the minimum range of 500-m resolution provides an unconditionally stable solution to downward continuation without the need for regularisation of the computation algorithm. In this case, downward continued data contribute from -13 to 12 mm to geoid heights and from -0.128 to 0.118 m(2)s(-2) to local gravity potential value at Malin-Head tide gauge station in Ireland.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10500 - Earth and related environmental sciences

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Studia Geophysica et Geodaetica

ISSN

0039-3169

e-ISSN

—

Svazek periodika

65

Číslo periodika v rámci svazku

3-4

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

16

Strana od-do

219-234

Kód UT WoS článku

000692630800001

EID výsledku v databázi Scopus

2-s2.0-85114135598