Geoid determination using airborne gravity vectors

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

Geoid determination using airborne gravity vectors

Original language description

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.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10508 - Physical geography

Project

<a href="/en/project/GA23-07031S" target="_blank" >GA23-07031S: Ellipsoidal modelling of planetary gravitational fields</a><br>

Continuities

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

Publication year

2025

Confidentiality

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

Name of the periodical

Earth, Planets and Space

ISSN

1880-5981

e-ISSN

1880-5981

Volume of the periodical

77

Issue of the periodical within the volume

1

Country of publishing house

DE - GERMANY

Number of pages

20

Pages from-to

nestránkováno

UT code for WoS article

001600911700001

EID of the result in the Scopus database

2-s2.0-105019964544