The GPS-gravimetry boundary value problem |
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Authors: | Email author" target="_blank">Jinhai?YuEmail author Chuanding?Zhang |
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Institution: | 1. Institute of Geodesy and Geophysics of Chinese Academy of Sciences, Wuhan 430077, China;Zhengzhou Information Engineering University, Zhengzhou 450052, China 2. Zhengzhou Information Engineering University, Zhengzhou 450052, China |
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Abstract: | How to determine the earth’s external gravity field with the accuracy of O(T2) by making use of GPS data and gravity values measured on the earth’s surface is dealt with in this paper. There are two
main steps: to extend these measured values on the earth’s surface onto the reference ellipsoid at first and then to seek
for the integral solution of the external Neumann problem outside the ellipsoid. In addition, the corresponding judging criteria
of accuracy to solve the GPS-gravity boundary value problem are established. The integral solution given in the paper not
only contains all frequency-spectral information of the gravity field with the accuracy of O(T 2), but is also easily computed. In fact, the solution has great significance for both theory and practice. |
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Keywords: | Neumann boundary value problem integral solution gravity disturbance |
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