HPM Satellite Survivability Modeling

Contractor will implement techniques for combining EM coupling codes and circuit analysis codes to determine transfer functions from HPM threats (cw and pulsed) to circuit component responses. Techniques will be general enough to treat pulse rise time, total energy, and duration. Treatment will be general enough to work for friendly or unfriendly satellites. Coupling through antennas, sensors, leaky walls, and apertures will be permitted. Contractor will treat the exterior coupling, the RF points of entry, the internal response, the internal RF coupling to cables and circuits, and the circuit response as associated, but separable, problems. An effort will be underataken to extend the EM regime previously considered subject to probabilistic analysis. This extension will include topics such as probabilistic representation of external coupling, crack and aperture definition, and EM penetration through such p.o.e.'s. Deterministic treatment of p.o.e. EM penetration and of the external coupling will also be considered, but the internal response will only be treated statistically. Contractor will explore application of probabilistic techniques to scenarios where the overmoding assumption may not hold. This exploration will be performed assuming that field distributions are approximately log normal with a chi square upper tail even if the overmoding assumption is not met.