Abstract:The normalized total gradient method of gra-vity anomaly includes multi-calculations of downward continuation and vertical derivative,both of them amplify the high wavenumber components.To sovle the problem,we propose a new idea for the issue in this paper.Two stable algorithms,Milne method of downward continuation and integrated vertical second derivative method,are used for the normalized total gradient of gravity anomaly.The improved method is applied to locate the center of the infinite horizontal cylinder model,and the result is accurate.In the real gravity anomaly profile data processing,compared with the norma-lized total gradient of gravity anomaly based on Taylor series expansion,this proposed method obtains the more accurate location of the mine center,which proves the validity and practicality of the proposed method.
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