Determination of gravity potential from spherical harmonic coefficients of the Global Geopotential Model
1 Khoa Trắc địa - Bản đồ và Quản lý đất đai, Trường Đại học Mỏ - Địa chất, Việt Nam;
2 Phòng kỹ thuật, Công ty Cổ phần Dịch vụ và Thương mại 568, Việt Nam.
- Received: 15th-Mar-2017
- Revised: 10th-June-2017
- Accepted: 31st-Aug-2017
- Online: 31st-Aug-2017
- Section: Geomatics and Land Administration
The article presents the detailed mathematical formulas for determination of gravity potential (W) from spherical harmonic coefficients of the Global Geopotential Models (GGMs) and established a computer program by Matlab programming language. The gravity potential have been calculated by using spherical harmonic coefficients of the Earth Gravitational Model EGM2008 at the tidegauges (Cô Tô, Hòn Ngư, Phú Quốc, Côn Đảo) along the coast and on the islands in the sea of Vietnam. At the tidegauges have GPS and leveling data with high precision. The result of experimental calculation has shown that: The gravity potential of the local geoid of VietNam (W0-CBVN) are 62636846.9843m2s-2 with an accuracy of about = ±0.0132 m2s-2.