Greens Function Retrieval by Crossconvolutions
Several formulations exist for retrieving the Greens function from cross correlation of (passive) recordings at two locations. Usually these formulations retrieve Greens functions from sources on a closed boundary. Then they apply to media without losses inside the domain spanned by the sources. Until recent, these formulations were only developed for wave phenomena. Now Greens function representations for Greens functions for effectromagnetic fields in matter exist. When they exploit cross correlations, the sources must lie on a boundary of a lossless medium and outside this boundary the medium can be lossy. Then such methods can be exploited for passive applications using transient or ambient noise sources, either natural or man-made. For seabed logging methods this is not a realistic scenario because possible are necessarily located in the conductive medium. A second formulation employs cross convolutions to retrieve the Greens function and this formulation remains valid when the media in the domain spanned by the sources is conductive. We derive here general exact effectromagnetic Greens function retrieval and simplify the obtained results for practical applications.
Evert Slob
Department of Geotechnology, Delft University of Technology, The Netherlands
国际会议
Progress in Electromagnetics Research Symposium 2007(2007年电磁学研究新进展学术研讨会)(PIERS 2007)
北京
英文
1799-1803
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）