Global EM induction in the Earth:Inverse time-domain modelling based on the adjoint approach

摘要：

We present a new method of inverse global electromagnetic (EM) induction modeling which is based on the effective evaluation of gradient of the misfit function in the space of model parameters using the solution of the adjoint problem. First, we present the rigorous formulations of the adjoint problem. Then, we apply the conjugate gradient (CG) or quasi-Newton (QN, also known as variable metrics) method to solve the non-linear inverse problem. The technique is tested on synthetic tests ranging from artificial checkerboard models excited by smooth sources to more realistic setups with respect to the upcoming SWARM mission.

关键词： time-domain EM induction SWARM

作者: J. Velímsky Z. Martinec Ondrej Soucek

作者单位: Institut für Geophysik, ETH Zürich;Department of Geophysics, Faculty of Mathematics and Physics, Cha Department of Geophysics, Faculty of Mathematics and Physics, Charles University in Prague;Section 1 Department of Geophysics, Faculty of Mathematics and Physics, Charles University in Prague

会议类型: 国际会议

会议名称: The 19th International Workshop on Electromagnetic Induction in the Earth(第十九届国际地球电磁感应学术研讨会)

会议地点: 北京

会议语种:英文

页码: 857-861

在线出版日期: 2008-10-23（万方平台首次上网日期，不代表论文的发表时间）