远震P波衰减因子的测量与Q成像方法

Methods of the measurement of the attenuation factor of teleseismic P wave and Q seismic tomography

概述了远震P波衰减因子的测量方法，并将作者在走时层析成像研究中提出的方法推广到三维Q值图像重建中，并认为，与走时层析成像相比，有其特殊的困难，主要表现在δt^*的测量值具有较大的误差，且各接收台站的δt^*的测量精度也会明显不同．此外，理论误差可能也比较大．为此，有必要采用具有抗数据失常能力的“健全”方法，并建议使用l1范数极小化反演的有效数值方案．

In this paper we summarized the measurement method about the attenuation factor of teleseismic P wave, and the seismic tomographic method about the travel time is popularized to the reconstruction of 3\|D Q images. Comparing with the travel time tomography, there is a specific difficulty in the Q tomography. The main expression is the larger error in δt* measurement values and the deferent measurement precision in various received stations. Moreover theoretic error can be larger. Therefore it is necessary that we use a 'wholesome' method with ability of anti\|data out of gear, and make suggestions to use the numerical inverse method of l1 norm minimization. 