Results 31 to 40 of about 151 (126)

Study of the accuracy of global geopotential models EGM2008, EIGEN-6C4, GECO, SGG-UGM-1, SGG-UGM-2, XGM2019 on the territory of the Russian Federation

Vestnik SSUGT (Siberian State University of Geosystems and Technologies), 2023
The improvement of the gravimetric knowledge of the Russian Federation and the creation of new models of the Earth's gravitational field (EGF) in the form of spherical harmonics of the geopotential set the task of choosing the most suitable model based on the characteristics of the gravitational field on the territory of Russia.
V. F. Kanushin, D. N. Goldobin, N. N. Kobeleva   +2 more
openaire   +1 more source

Geoid heights in Costa Rica, Case of Study: Baseline Along the Central Pacific Zone

Ingeniería, 2019
A precise orthometric height (H) and orthometric height difference (ΔH) determination is required in many fields like construction, geodesy and geophysics.
Alonso Vega Fernádez, Oscar Lücke Castro, Ph. D., Jaime Garbanzo Leon, M. Sc.   +2 more
doaj   +1 more source

Vertical Deflections and Gravity Disturbances Derived from HY-2A Data

Remote Sensing, 2020
The first Chinese altimetry satellite, Haiyang-2A (HY-2A), which was launched in 2011, has provided a large amount of sea surface heights which can be used to derive marine gravity field.
Xiaoyun Wan, Richard Fiifi Annan, Shuanggen Jin, Xiaoqi Gong   +3 more
doaj   +1 more source

Analysis of Regional and Residual Gravity Disturbance of Major Fault Belts in the Tarim Basin, Western China

Remote Sensing, 2022
Large fault belts often influence the paleo-geomorphic changes in basins and control hydrocarbon accumulation and distribution in basins. Based on the gravity field model European Improved Gravity model of the Earth via New techniques (EIGEN)-6C4, this ...
Yunlong Wu, Feng Liang, Jianguo Yan, Junling Pei, Yi Zhang   +4 more
doaj   +1 more source

Evaluation of recent combined global geopotential models in Brazil

Journal of Geodetic Science, 2018
The aim of this paper is to present a quantitative analysis of the adequacy of the main currently existing combined Global Geopotential Models (GGMs) for modeling normal-geoid heights throughout Brazil.
Nicacio E., Dalazoana R., Freitas S. R. C. de   +2 more
doaj   +1 more source

Analysis of Gravity Disturbance Compensation for Initial Alignment of INS

IEEE Access, 2020
To address the accuracy requirements of initial alignment of high-precision inertial navigation systems (INSs), gravity disturbance compensation for INSs based on a spherical harmonic model is investigated herein.
Shiwen Hao, Zhaofa Zhou, Zhili Zhang, Zhenjun Chang, Xianyi Liu   +4 more
doaj   +1 more source

Methodology for local correction of the heights of global geoid models to improve the accuracy of GNSS leveling

Geodesy and Geodynamics
At present, one of the methods used to determine the height of points on the Earth's surface is Global Navigation Satellite System (GNSS) leveling. It is possible to determine the orthometric or normal height by this method only if there is a geoid or ...
Stepan Savchuk, Alina Fedorchuk
doaj   +1 more source

Inversion of satellite gravimetric data from Recôncavo-Tucano-Jatobá Basin System

Brazilian Journal of Geology, 2020
Density differences among subsurface rocks cause variations in the gravitational field of Earth, which is known as gravity anomaly. Interpretation of these gravity anomalies allows assessment of the probable depth and shape of the causative body.
Thaíza Pereira Bessoni, Amin Bassrei, Luiz Gabriel Souza de Oliveira   +2 more
doaj   +1 more source

A New Combination Approach for Gibbs Phenomenon Suppression in Regional Validation of Global Gravity Field Model: A Case Study in North China

Remote Sensing
A global gravity field model (GGM) is essential to be validated with ground-based or airborne observational data for the accurate application of the GGM at a regional scale.
Yingchun Shen, Wei Feng, Meng Yang, Min Zhong, Wei Tian, Yuhao Xiong, Zhongshan Jiang   +6 more
doaj   +1 more source

Comparative Study on Predicting Topography from Gravity Anomaly and Gravity Gradient Anomaly

Remote Sensing, 2023
Owing to the dependence of algorithms on the measurement of ship soundings and geophysical parameters, the accuracy and coverage of topography still need to be improved. Previous studies have mostly predicted topography using gravity or gravity gradient,
Huan Xu, Yuwei Tian, Jinhai Yu, Ole Baltazar Anderson, Qiuyu Wang, Zhongmiao Sun   +5 more
doaj   +1 more source