Three-dimensional Joint Inversion of Acoustic and Electromagnetic Data Based on Contrast Source Inversion

In this work, we study a three-dimensional joint inversion algorithm for acoustic and electromagnetic data based on the contrast source inversion method. Two contrast sources and two contrasts are defined to invert parameters in both acoustics and electromagnetics. The joint inversion is achieved by two interactive regularization operators, in which we use the contrast in acoustics to constrain the contrast in electromagnetics, and vice versa. Through minimizing the cost function of the joint inversion, we can reconstruct compressibility in acoustics and permittivity in electromagnetics. Numerical results show good performance of the 3D joint inversion method.