This goal of this research and development program is to enable revolutionary advances aimed at providing high resolution imaging through even the worst material environments. The proposed effort utilizes standard ELF-VLF signals of opportunity (VLF transmitter signals and lightning-generated sferics) to provide background imaging capabilities and enhances the background 3-D resolution space by simultaneously leveraging the frequency dependent magnetic transparency properties of highly conducting media. The IMG-related portion of the effort focuses on creating efficient rotating magnets, used to create oscillating static magnetic fields that scatter from conducting media only when the frequency of oscillation is above a corner frequency set by the electrical properties and the thickness of the conductor. The overall effect is a frequency selective transparency that enables imagers to better discern between two adjacent conducting bodies of different thicknesses.