Time exposure acoustics in seismic exploration

为表面下的成像的一个被动地震方法的分析在周围的地震噪音作为照明的来源在哪个被采用被介绍表面下散布 ers。成像算法能以引起图象背景噪音随着时间的过去减少的一种递归的方式把新数据合并到图象。在空间地支离破碎的周围的噪音的假设下面，为成像算法的点传播函数的一个分析表达式被导出。点传播函数(PSF ) 描绘图象的分辨率，它是收到的数组长度和周围的带宽的一个函数。

An analysis of a passive seismic method for subsurface imaging is presented in which ambient seismic noise is employed as the source of illumination of subsurface scatterers. The imaging algorithm can incorporate new data into the image in a recursive fashion which causes image background noise to diminish over time. Under the assumption of spatially-incoherent ambient noise, an analytical expression for the point-spread function of the imaging algorithm is derived. The point-spread function （PSF） characterizes the resolution of the image, which is a function of the receiving array length and the ambient bandwidth.