Notice of RetractionThe Formation and Analysis of the Earth Gravitation Model Based on Point Masses

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

The theory of the point-mass model has been widely used to represent the local gravity field. In this paper, the approximation theory of point-mass model is briefly introduced, and the characteristics of the elements in the coefficient matrix for the model construction are analyzed by numerical calculation. The data of gravity anomaly is calculated by using EGM2008 with degree and order 720 in the region of 32°~34°N and 103°~105°N. The four-tier point-mass groups based on the geopotential model with degree and order 36 from low frequency to high frequency are applied to approximate the gravity field. The results of the tests show that the truncation error of gravity disturbance created by using the point-mass model is less than 2 mGal on the radial direction and there is an optimal truncation error for some certain spectrum gravity field in the space.