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

doi:10.11720/wtyht.2019.0103

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Abstract

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.

Key words： PPP CGCS2000 Tibetan plateau geophysical prospecting

Received: 01 March 2019 Published: 25 October 2019

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	Articles by authors
	Hui DU
	Tao GENG
	Xing-Xing DUAN
	Xian-Kun JI
	Yun BAI

Cite this article:

Hui DU,Tao GENG,Xing-Xing DUAN, et al. The application of precise point positioning to local geophysical prospecting in the Tibetan Plateau[J]. Geophysical and Geochemical Exploration, 2019, 43(5): 1046-1053.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2019.0103 OR https://www.wutanyuhuatan.com/EN/Y2019/V43/I5/1046

GPS control net sketch alh map of Youdunzi project

The relation of coordinates converge with observation time

The number of data calculated by each control station in Youdunzi project

Inner coincidence accuracy of PPP coordinate in first example

Outer coincidence accuracy of PPP coordinate in first example

GPS control net sketch alh map of Menyuan project

The number of data calculated by each control station in Menyuan project

Inner coincidence accuracy of PPP coordinate in second example

Outer coincidence accuracy of PPP coordinate in second example

Distribution of outer-coincidence coordinate difference

Mean velocities for Epoch correction in project

Conversion parameter of ITRF2008 to ITRF 97

Outer coincidence accuracy after correction

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