On determination of the geoid from measured gradients of the Earth's gravity field potential

P Novák, M Šprlák, M Pitoňák - Earth-Science Reviews, 2021 - Elsevier
The geoid is an equipotential surface of the static Earth's gravity field which plays a
fundamental role in definition of physical heights related to the mean sea level (orthometric …

Revised depth of the Challenger Deep from submersible transects; including a general method for precise, pressure-derived depths in the ocean

SF Greenaway, KD Sullivan, SH Umfress… - Deep Sea Research …, 2021 - Elsevier
We present a revised estimate of the maximum depth of the Challenger Deep, generally
considered the deepest area of the world's oceans, based on a series of submersible dives …

A novel method for computing the vertical gradients of the potential field: application to downward continuation

KV Tran, TN Nguyen - Geophysical Journal International, 2020 - academic.oup.com
Downward continuation is a very useful technique in the interpretation of potential field data.
It would enhance the short wavelength of the gravity anomalies or accentuate the details of …

Numerical solutions of the mean‐value theorem: New methods for downward continuation of potential fields

C Zhang, Q Lü, J Yan, G Qi - Geophysical Research Letters, 2018 - Wiley Online Library
Downward continuation can enhance small‐scale sources and improve resolution.
Nevertheless, the common methods have disadvantages in obtaining optimal results …

Downward continuation of airborne gravity data by means of the change of boundary approach

AH Mansi, M Capponi, D Sampietro - Pure and Applied Geophysics, 2018 - Springer
Within the modelling of gravity data, a common practice is the upward/downward
continuation of the signal, ie the process of continuing the gravitational signal in the vertical …

Using radial basis functions in airborne gravimetry for local geoid improvement

X Li - Journal of Geodesy, 2018 - Springer
Radial basis functions (RBFs) have been used extensively in satellite geodetic applications.
However, to the author's knowledge, their role in processing and modeling airborne gravity …

GOCE downward continuation to the Earth's surface and improvements to local geoid modeling by FFT and LSC

DA Natsiopoulos, EG Mamagiannou, EA Pitenis… - Remote Sensing, 2023 - mdpi.com
One of the main applications of the gravity field and steady-state Ocean Circulation Explorer
(GOCE) satellite data is their combination with local gravity anomalies for geoid and gravity …

An accurate and lightweight calculation for the high degree truncation coefficient via asymptotic expansion with applications to spectral gravity forward modeling

L Zhong, H Li, Q Wu - Journal of Geodesy, 2024 - Springer
The truncation coefficient is widely utilized in non-global coverage computations of
geophysics and geodesy and is always altitude dependent. As the two commonly used …

A new method of improving global geopotential models regionally using GNSS/levelling data

W Liang, R Pail, X Xu, J Li - Geophysical journal international, 2020 - academic.oup.com
In this paper, a new method for regionally improving global geopotential models (GGMs)
with global navigation satellite system (GNSS)/levelling data is proposed. In this method, the …

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

S Sajjadi, Z Martinec, P Prendergast… - Studia Geophysica et …, 2021 - Springer
The differences between local and reference geopotential values are the fundamental
quantities of interest in the geodetic boundary value problem approach for connecting …