The application of precise point positioning to local geophysical prospecting in the Tibetan Plateau
Hui DU1,2,3, Tao GENG1,2,3, Xing-Xing DUAN1,2,3, Xian-Kun JI1,2,3, Yun BAI1,2,3
1. Key laboratory for the Study of Focused Magmatism and Giant Ore Deposits,MLR,Xi’an 710054, China 2. Xi’an Center of China Geological Survey,Xi’an 710054, China; 3. Northwest Geological Science and Technology Innovation Center,Xi’an 710054, China;
The precise point positioning method has such advantages as no control point and the fact that single receiver can obtain high precision coordinate results by static measurement. It has wide application in geophysical exploration in the Tibetan Plateau and other difficult areas. This paper is based on the dealing with observation data of control points formed by two 1:250,000 regional gravity survey projects in the west and east of the Tibetan Plateau using the precise point positioning method; by calculating and comparing the difference between the precision single point positioning result of these points and the CGCS2000 coordinate result obtained by traditional measurement adjustment method, the error source is analyzed. It is concluded that the main source of the error of two coordinates is caused in the calendar and frame difference, and then through calendar and frame correction the CGCS2000 coordinates of control point are obtained. It is found that the corrected coordinates have the same precision as the traditional adjustment coordinate. On such a basis, the authors put forward an idea of using precise point positioning method to obtain CGCS2000 coordinates and pointed out the items deserving attention in using this method, and the application range of this method.
杜辉, 耿涛, 段星星, 冀显坤, 白运. 精密单点定位技术在青藏高原地区物探测量中的应用研究[J]. 物探与化探, 2019, 43(5): 1046-1053.
Hui DU, Tao GENG, Xing-Xing DUAN, Xian-Kun JI, Yun BAI. The application of precise point positioning to local geophysical prospecting in the Tibetan Plateau. Geophysical and Geochemical Exploration, 2019, 43(5): 1046-1053.
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