Determination of the EMP enhancement factor
TL;DRAbstract
EMP signals recorded aboard a C-135 aircraft are discussed with respect to die difference in amplitude and phase characteristics from that of a free-space sign*!. The enhancement factor is defined as die ratio of the normalized amplitude of die aircraft signal to die normalized amplitude of close-in sensors for a 2 MV pulsed antenna system. Three different close-in sensors were used to measure fields in excess of 10 kV/m. The radiation pattern was mapped in azimuth and elevation by die aircraft and die close-in sensors. The enhancement factor and die time rate of change of die EMP signal is seen to vary significantly widi aircraft attitude and position.
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EMP signals recorded aboard a C-135 aircraft are discussed with respect to die difference in amplitude and phase characteristics from that of a free-space sign*!. The enhancement factor is defined as die ratio of the normalized amplitude of die aircraft signal to die normalized amplitude of close-in sensors for a 2 MV pulsed antenna system. Three different close-in sensors were used to measure fields in excess of 10 kV/m. The radiation pattern was mapped in azimuth and elevation by die aircraft and die close-in sensors. The enhancement factor and die time rate of change of die EMP signal is seen to vary significantly widi aircraft attitude and position.
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