��Դ�ͳ DEXP ���ٳ����������ڵ����幹��ָ����ȱ�㣬������������������쳣��ͬ�״�������ֵ DEXP �ķ������÷���ʹ�ó����������ڵ����幹��ָ�������������ȹ�����ȫ�Զ���������ҪѰ�ұ�ֵ DEXP �������ļ���ֵ��λ�á�ͨ���÷������Ƴ�����Ƚ�������Խ��е����幹��ָ���Ĺ��ơ�ͨ��ģ�����飬֤���÷�����׼ȷ�ع��Ƴ�����������λ���Լ�����������͡����÷���Ӧ�õ� Bell Geospace ��˾�� Vinton Dome ��õ� Air- -FTG ȫ���������ݶ�������ȡ���˺ܺõĽ����

Traditional DEXP fast imaging method depends on the structure index of geological bodies�� Aiming at the disadvantage��the authors used different order vertical derivatives of gravity data to define the ratio DEXP method�� This method makes the imaging result independent from the structure index�� The estimated source depths are fully automatic��and only the position of extreme point of the ratio DEXP image is needed�� Through the esti- mated depths��we can determine the structure index of each source�� Via model test��the authors proved this method can accurately estimate the depth and the types of geological bodies�� Finally�� the authors applied our new method to real Air - - FTG gravity gradient data acquired by Bell Geospace for the Vinton Dome��and it got well results��