Results 11 to 20 of about 16,098 (281)

Assessment of Global Geopotential Models for Modelling Malaysia Marine Geoid

International Journal of Integrated Engineering, 2022
The evaluation towards global geopotential models represents a significant part in modelling the localised Marine Geoid. The marine geoid provides the vertical reference information in Marine Spatial Data Infrastructures (MSDI) development response to United Nations Sustainable Development Goals 14 for the ...
Yahaya, Noor Anim Zanariah, Md. Din, Ami Hassan, Omar, Abdullah Hisam, Mohamad Abdullah, Nazirah, Mohammad Yazid, Nornajihah, Pasuya, Muhammad Faiz, Abdul Wahab, Mohamad Ikbar   +6 more
openaire   +2 more sources

Performance evaluation of high/ultra-high-degree global geopotential models over Vietnam using GNSS/leveling data

Geodesy and Geodynamics, 2023
The availability of many high-degree Global Geopotential Models (GGMs), namely EGM2008, EIGEN-6C4, GECO, SGG-UGM-1, SGG-UGM-2, XGM2019e_2159, and GGMPlus, challenges users regarding which model is best for Vietnam.
Hoa Thi Pham, Sten Claessens, Michael Kuhn, Joseph Awange   +3 more
doaj   +1 more source

The Refined Gravity Field Models for Height System Unification in China

Remote Sensing, 2022
A unified height datum is essential for global geographic information resource construction, ecological environment protection, and scientific research.
Panpan Zhang, Zhicai Li, Lifeng Bao, Peng Zhang, Yongshang Wang, Lin Wu, Yong Wang   +6 more
doaj   +1 more source

The Accuracy Verification of Recent Global Geopotential Model based on GNSS/Levelling Data on Ground Control Points in Johor [PDF]

E3S Web of Conferences
The external gravitational field of the Earth is mathematically represented using spherical harmonic (SH) coefficients in the global geopotential model. Hence, the appropriate global geopotential model for a region needs to determine a reference surface ...
Qi Lee Z., Yazid Nornajihah Mohammad, Sebastian Joshua Mickail Anak, Zaki Ahmad Hakimi Mohd, Din Ami Hassan Md, Pa’suya Muhammad Faiz   +5 more
doaj   +1 more source

Joint analysis of selected GRACE monthly spherical harmonic solutions and monthly MASCON solutions

Contributions to Geophysics and Geodesy, 2021
Study presented in this paper is focused on comparison and statistical assessment of differences between the selected Level 2 products of the satellite mission Gravity Recovery and Climate Experiment (GRACE).
Adam NOVÁK, Juraj JANÁK, Barbora KOREKÁČOVÁ   +2 more
doaj   +1 more source

On global and regional spectral evaluation of global geopotential models

Journal of Geophysics and Engineering, 2010
Spectral evaluation of global geopotential models (GGMs) is necessary to recognize the behaviour of gravity signal and its error recorded in spherical harmonic coefficients and associated standard deviations. Results put forward in this wise explain the whole contribution of gravity data in different kinds that represent various sections of the gravity
Ustun, A., Abbak, R.
openaire   +4 more sources

Comparison of Current Gravity Estimation and Determination Models [PDF]

, 2018
This paper will discuss the history of gravity estimation and determination models while analyzing methods that are in development. Some fundamental methods for calculating the gravity field include spherical harmonics solutions, local weighted ...
Hillman, Kyle
core   +1 more source

Mean Dynamic Topography Modeling Based on Optimal Interpolation from Satellite Gravimetry and Altimetry Data

Applied Sciences, 2021
Mean dynamic topography (MDT) is crucial for research in oceanography and climatology. The optimal interpolation method (OIM) is applied to MDT modeling, where the error variance–covariance information of the observations is established.
Yihao Wu, Jia Huang, Hongkai Shi, Xiufeng He   +3 more
doaj   +1 more source

A combined regional Geopotential Model using optimized global Gravity Field Solutions

IOP Conference Series: Earth and Environmental Science, 2022
Abstract To develop a gravimetric geoid, a Global Geopotential Model (GGM) is required to minimise the truncation error arising from using the Stokes integral with a limited number of gravity data points. The choice of a best-fitting GGM determines the accuracy of a gravimetric geoid solution.
C J Nyoka, A H M Din, M F Pa’suya, A H Omar   +3 more
openaire   +1 more source

Global Geopotential Model Evaluations and Local Geoid in Indonesia: A Review

IOP Conference Series: Earth and Environmental Science, 2021
Abstract Geoid model was chosen as a vertical reference in Indonesia based on the Head of the Geospatial Information Agency Regulation (Perka BIG) No. 15 of 2013 concerning the Indonesian Geospatial Reference System (SRGI2013). Therefore, the development of local geoid models continues to be carried out to obtain good accuracy. The geoid
Hamidatul Aminah, Ira Mutiara Anjasmara
openaire   +1 more source