Telecommunications and Radio Engineering

PARAMETRIC SOURCE OF ELF TRANSIENTS

ABSTRACT

We address changes in the global electric circuit, which were caused by arrival of the giant gamma flare from SGR 1806-20 to the dayside of the globe. It is shown that a parametric source of radio emission depends on the structure of the global electric circuit. We consider the formation of a discrete radio pulse in the framework of realistic exponential height profile of air resistance. We show that altitudes around the tropopause play a significant role in pulse formation. Spectral density radiated is inversely proportional to the frequency. Waveforms are computed of a parametric pulse caused by the gamma rays arrival.

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