GOCO06s–a satellite-only global gravity field model

A Kvas, JM Brockmann, S Krauss… - Earth System …, 2020 - essd.copernicus.org
GOCO06s is the latest satellite-only global gravity field model computed by the GOCO
(Gravity Observation Combination) project. It is based on over a billion observations …

Regional gravity field modeling using band-limited SRBFs: a case study in Colorado

Z Ma, M Yang, J Liu - Remote Sensing, 2023 - mdpi.com
The use of spherical radial basis functions (SRBFs) in regional gravity field modeling has
become popular in recent years. However, to our knowledge, their potential for combining …

Regional gravity field refinement for (quasi-) geoid determination based on spherical radial basis functions in Colorado

Q Liu, M Schmidt, L Sánchez, M Willberg - Journal of geodesy, 2020 - Springer
This study presents a solution of the '1 cm Geoid Experiment'(Colorado Experiment) using
spherical radial basis functions (SRBFs). As the only group using SRBFs among the …

Characterization and stabilization of the downward continuation problem for airborne gravity data

X Li, J Huang, R Klees, R Forsberg, M Willberg… - Journal of …, 2022 - Springer
In this study, we compare six commonly used methods for the downward continuation of
airborne gravity data. We consider exact and noisy simulated data on grids and along flight …

The impact of noise in a GRACE/GOCE global gravity model on a local quasi‐geoid

C Slobbe, R Klees, HH Farahani… - Journal of …, 2019 - Wiley Online Library
We present a local quasi‐geoid (QG) model which combines a satellite‐only global gravity
model with local data sets using weighted least squares. The QG is computed for an area …

[HTML][HTML] Enhancing Regional Quasi-Geoid Refinement Precision: An Analytical Approach Employing ADS80 Tri-Linear Array Stereoscopic Imagery and GNSS Gravity …

W Xu, G Chen, D Yang, K Ding, R Dong, X Ma, S Han… - Remote Sensing, 2024 - mdpi.com
This research investigates precision enhancement in regional quasi-geoid refinement
through ADS80 tri-linear array scanning stereoscopic imagery for aerial triangulation …

A Direct Approach for Local Quasi-Geoid Modeling Based on Spherical Radial Basis Functions Using a Noisy Satellite-Only Global Gravity Field Model

H Yu, G Chang, Y Yu, S Zhang - Remote Sensing, 2024 - mdpi.com
The remove–compute–restore (RCR) approach is widely used in local quasi-geoid
modeling. However, the classical RCR approach usually does not take into account the …

How to deal with the high condition number of the noise covariance matrix of gravity field functionals synthesised from a satellite-only global gravity field model?

R Klees, DC Slobbe, HH Farahani - Journal of Geodesy, 2019 - Springer
The posed question arises for instance in regional gravity field modelling using weighted
least-squares techniques if the gravity field functionals are synthesised from the spherical …

Gravity field modeling in mountainous areas based on band-limited SRBFs

Z Ma - Journal of Geodesy, 2024 - Springer
In this study, a novel two-scale spherical radial basis function (SRBF) modeling method is
proposed for regional gravity field determination. First, satellite-only global gravity field …

Combination of different observation types through a multi-resolution representation of the regional gravity field using the pyramid algorithm and parameter estimation

Q Liu, M Schmidt, L Sánchez - Journal of Geodesy, 2022 - Springer
The optimal combination of different types of gravity observations is the key to obtaining a
high-resolution and high-precision regional gravity model. Current studies based on …