Abstract

The transmission into the earth of an electromagnetic transient, such as might be generated by a nuclear explosion, is of interest from the point of view of determining the shielding properties of the earth. A plane electromagnetic pulse normally incident on a plane earth is studied as a convenient model. The steady-state transfer function is first evaluated and its properties analyzed for dry, moist, and wet earth over the complete frequency spectrum. The transmission of an incident pulse of Gaussian shape in air is formulated and its shape determined as it enters and advances into the earth. The numerical results determined by a high-speed computer are analyzed and discussed.

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