A precise geoid model for Africa: AFRgeo2019

HA Abd-Elmotaal, N Kühtreiber, K Seitz… - Beyond 100: The Next …, 2020 - Springer
In the framework of the IAG African Geoid Project, an attempt towards a precise geoid model
for Africa is presented in this investigation. The available gravity data set suffers from …

Precision evaluation of recent global geopotential models based on GNSS/leveling data on unified control points

J Lee, JH Kwon - Journal of the Korean Society of Surveying …, 2020 - koreascience.kr
After launching the GOCE (Gravity Field and Steady-State Ocean Circulation Explorer)
which obtains high-frequency gravity signal using a gravity gradiometer, many research …

Evaluation of GOCE-based global gravity field models over Japan after the full mission using free-air gravity anomalies and geoid undulations

PA Odera, Y Fukuda - Earth, Planets and Space, 2017 - Springer
The performance of Gravity field and steady-state Ocean Circulation Explorer (GOCE) global
gravity field models (GGMs), at the end of GOCE mission covering 42 months, is evaluated …

Evaluation of global gravity field models using shipborne free-air gravity anomalies over the Gulf of Guinea, Central Africa

KP Gautier, Y Loudi, ZA Alain, KH Ludovic… - Survey …, 2022 - Taylor & Francis
In this work, the principal aim is to evaluate some recent GGMs on the Gulf of Guinea region
using shipborne free-air gravity data. Two types of GGMs are evaluated in this study …

AFRGDB_V2. 0: the gravity database for the geoid determination in Africa

HA Abd-Elmotaal, K Seitz, N Kühtreiber… - … Symposium on Advancing …, 2019 - Springer
The available gravity data set for Africa consists of land point gravity data as well as
shipborne and altimetry derived gravity anomalies data, but suffers from a lot of significant …

An alternative geoid model for Africa using the shallow-layer method

M Ashry, WB Shen, HA Abd-Elmotaal - Studia Geophysica et Geodaetica, 2021 - Springer
The aim of the current investigation is to determine an alternative geoid model for Africa
using the shallow-layer method. The shallow-layer method, following the basic definition of …

Estimating gravity field and quasi-geoid in Cameroon (CGM20)

R Barzaghi, D Carrion, J Kamguia, LH Kande… - Journal of African Earth …, 2021 - Elsevier
In this paper, the computation of the new gravimetric quasi-geoid of Cameroon based on
some recent global geopotential models and a detailed Digital Terrain Model (DTM) of the …

Validation of a tailored gravity field model for precise quasigeoid modelling over selected sites in Cameroon and South Africa

PA Odera, OI Apeh, L Yap, MS Mphuthi - Journal of Applied …, 2024 - degruyter.com
In this study, a tailored gravity-field model is developed to fit and recover local terrestrial
gravity data by integrating gravity from global gravity-field models, residual gravity derived …

Establishment of the gravity database AFRGDB_V1. 0 for the African geoid

HA Abd-Elmotaal, K Seitz, N Kühtreiber… - IGFS 2014: Proceedings …, 2016 - Springer
In the framework of the IAG African Geoid Project it is needed to have a uniform gridded
gravity data set to compute the geoid using Stokes' integral in the frequency domain by 1-D …

Local geoid model of the Western Desert in Egypt using terrestrial gravity data and global geopotential models

MA Elwan, A Helaly, K Zharan, E Issawy… - Arabian Journal of …, 2021 - Springer
The local hybrid geoid model for the western desert in Egypt is computed by recent data,
including the global geopotential models, gravimetric measurements, and a high-resolution …