中文摘要：

回顾了接收函数叠加成像方法的发展过程,发现现在仍被广泛用于接收函数成像的共转换点（CCP）叠加成像方法存在着一定的缺点.通过计算转换波射线路径,得到不同深度、不同震中距转换波射线参数,发现共转换点叠加方法适合于P波接收函数叠加成像,对S波接收函数叠加成像却可能产生错误.结果显示在震中距为60°左右时,真正的转换点位置与共转换点叠加方法追踪到的转换点位置在深度为140km处水平方向偏离约200km,在震中距70°-80°之间时,真正的转换点位置与传统共转换点叠加方法追踪到的转换点位置之间的偏差小于S波接收函数的水平分辨率.利用不同深度产生的转换波射线参数进行反投影,能将转换点归位到更接近于真实的转换点位置上,从而使得通过S波接收函数获取的地球内部结构更加可靠.在岩石圈厚度变化剧烈的地区,建议优先采用震中距在70°-80°之间的远震S波事件进行岩石圈结构的研究.

英文摘要：

We reviewed the developing process of the migration method of receiver function.There is some disadvantage of the Common Conversion Point（CCP）stacking method which is widely used in the receiver function migration imaging.The ray parameters of the converted waves in the different depth and epicentral distance is obtained by calculating the ray path of the converted waves.Our results show that the CCP stacking method is suitable for the migration imaging of P-wave receiver function,but it may make a mistake for S-wave receiver function.The results demonstrate the lateral distance is~200km between the converted point calculated by the CCP stacking method and the real converted point in the depth of 140 km when the epicentral distance is 60°,but the lateral distance is less than the resolution of the S-wave receiver function between the converted point calculated by the CCP stacking method and the real converted point when the epicentral distance is limited between 70°-80°.By using the different ray parameter of the converted wave to do the back projection,the converted point can be traced to the position that is much closer to the real position and the structure of the inner earth imaged by S-wave receiver function can be more reliable.The teleseismic events with epicentral distance between 70°-80°are more suitable to study the lithospheric structure when the thickness of the lithosphere varies strongly.