Geoid determination using airborne gravity vectors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F25%3A43976009" target="_blank" >RIV/49777513:23520/25:43976009 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1186/s40623-025-02277-8" target="_blank" >https://link.springer.com/article/10.1186/s40623-025-02277-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1186/s40623-025-02277-8" target="_blank" >10.1186/s40623-025-02277-8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Geoid determination using airborne gravity vectors

Popis výsledku v původním jazyce

In traditional airborne gravimetry, the vertical component of the gravity vector is used as an approximation of the measured magnitude of the gravity vector, which enters the determination of the local geoid. In this study, a comprehensive computational scheme for determining the local geoid using three components of the airborne gravity vector is presented. Our approach extends the existing one-step method for local geoid modelling by incorporating the full gravity vector measured by airborne sensors as boundary values in the gravimetric boundary-value problem. We derive integral kernel functions along with far-zone contributions for the three components of the airborne gravity vector and apply deterministic modifications to them. To validate our derivations, we use GGM-based airborne gravity vectors burdened with realistic coloured noise at one of the most challenging test sites for geoid determination, the 1-cm geoid test area in Colorado (USA). Results of closed-loop tests confirm that applying all three components of the GGM-based airborne gravity vector improves the internal accuracy of the geoid by 50 % compared to using only the vertical component. We further use real airborne gravity vectors observed at a test site in the same region and show that the RMS of the estimated geoid heights evaluated against the reference geoidal heights along the GSVS17 line is 2.3 cm using the “traditional approach” and 1.3 cm including the horizontal components. This indicates a significant improvement in the external accuracy (~46 %) of the geoid when the full gravity vector is used, without using other heterogeneous observations.

Název v anglickém jazyce

Geoid determination using airborne gravity vectors

Popis výsledku anglicky

In traditional airborne gravimetry, the vertical component of the gravity vector is used as an approximation of the measured magnitude of the gravity vector, which enters the determination of the local geoid. In this study, a comprehensive computational scheme for determining the local geoid using three components of the airborne gravity vector is presented. Our approach extends the existing one-step method for local geoid modelling by incorporating the full gravity vector measured by airborne sensors as boundary values in the gravimetric boundary-value problem. We derive integral kernel functions along with far-zone contributions for the three components of the airborne gravity vector and apply deterministic modifications to them. To validate our derivations, we use GGM-based airborne gravity vectors burdened with realistic coloured noise at one of the most challenging test sites for geoid determination, the 1-cm geoid test area in Colorado (USA). Results of closed-loop tests confirm that applying all three components of the GGM-based airborne gravity vector improves the internal accuracy of the geoid by 50 % compared to using only the vertical component. We further use real airborne gravity vectors observed at a test site in the same region and show that the RMS of the estimated geoid heights evaluated against the reference geoidal heights along the GSVS17 line is 2.3 cm using the “traditional approach” and 1.3 cm including the horizontal components. This indicates a significant improvement in the external accuracy (~46 %) of the geoid when the full gravity vector is used, without using other heterogeneous observations.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10508 - Physical geography

Projekt

<a href="/cs/project/GA23-07031S" target="_blank" >GA23-07031S: Elipsoidické modelování planetárních gravitačních polí</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Earth, Planets and Space

ISSN

1880-5981

e-ISSN

1880-5981

Svazek periodika

77

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

20

Strana od-do

nestránkováno

Kód UT WoS článku

001600911700001

EID výsledku v databázi Scopus

2-s2.0-105019964544