The results of marine gravity anomalies are determined by using Cryosat - 2 altimeter data for the Gulf of Tonkin in Vietnam

https://tapchi.humg.edu.vn/en/archives?article=912
  • Affiliations:

    1 Phòng Quản lý Điều hành Kỹ thuật Mỏ, Công ty Cổ phần xi măng Tân Thắng, Việt Nam;
    2 Khoa Trắc địa - Bản đồ và Quản lý đất đai, Trường Đại học Mỏ - Địa chất, Việt Nam

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  • Received: 23rd-Nov-2017
  • Revised: 11st-Mar-2018
  • Accepted: 27th-Apr-2018
  • Online: 27th-Apr-2018
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Abstract:

The purpose of this paper is to determine the marine gravity anomalies acquired by Cryosat-2 satellite altimeter data for the Gulf of Tonkin in Vietnam. To achieve that purpose, a process of determining marine gravity anomalies from satellite altimeter data has been set up. Sea surface height obtained from satellite altimetry. We need to remove these components: 1. The long-wavelength Geoid height; 2. The mean dynamic topography; 3. The time-varying sea surface topography. We have the residual Geoid heights after removing the above mentioned ingredients. The residual gravity anomalies are determined by the least-squares collocation method. Finally, the long-wavelength gravity anomalies are restored by the Global Geopotential Models. The results of marine gravity anomalies in the Gulf of Tonkin in Vietnam are represented in the form of the grid 2' x 2'. These marine gravity anomalies are also compared to 58989 points of ship-measured. The results compare show that: The Standard deviation between the Cryosat-2 satellite-derived gravity anomalies and ship-measured gravity anomalies are ± 3.57 mGal

How to Cite
Pham, T.Van and Nguyen, S.Van 2018. The results of marine gravity anomalies are determined by using Cryosat - 2 altimeter data for the Gulf of Tonkin in Vietnam (in Vietnamese). Journal of Mining and Earth Sciences. 59, 2 (Apr, 2018).