�ھ��Ƚ���������, �Ƚ���ω-k����Stolt�㷨��Gazdag���Ʒ���t-x���ڲ��ַ�ʽ�㷨���������SSF�㷨��FFD�㷨�ļ�������, ���ڼ�����ʱ��ƫ�Ƶĵ�λ������Ӧ����������仯�����ĵ�������ݵ��Ӳ�����仯�����岨��Ƶ�������������˲�������ѧ���Ե���Ϣ����������, �ھ��Ƚ���������, ω-k�򷽷���������Ӧ������仯��Ƶ�����������ܵõ��ϺõĽ��, ���÷������Ӳ��ֱ���������������ϵ�, �޷�Ӧ���ں����ٶȱ仯��������, ���Ը��ӵ�������Ӧ����FFD�����д���ͬʱ��Stolt�㷨Ϊ������������Ӳ�������Ӳ�Ƶ����ƫ�ƹ����еı仯��

The authors compare the calculation processes of Stolt method and Gazdag phase-shift method in ω-k domain, partial fraction method in t-x domain and SSF and FFD methods in complex domain under uniform medium condition. The impulse response of post-stack time migration in the zero offset, impulse amplitude change, wavelet amplitude change of centre seismic trace data and spectral characteristics of impulse wave all express the wave field dynamics characteristics. The analysis reflects that the methods in ω-k domain under uniform medium condition have good results in impulse response, amplitude change and spectral characteristics, but the wavelet resolution isworse than other methods and can not applied in the media of lateral velocity variation, so that the method of FFD is better for complex geological problems. Meanwhile, the variation of wavelet amplitude and spectrum in offset process have been analyzed taking Stolt as an example.