A technique for reconstruction of global lightning distance profile from background Schumann resonance signal

摘要

An inverse problem solution is considered for revealing the total worldwide lightning intensity and its distance distribution based on the decomposition of the average background Schumann resonance (SR) spectra. The one-site technique developed can be applied without invoking any preliminary suppositions about the spatial structure of the world thunderstorm activity. The technique enables to reduce the influence of additive noises occurring in experimental measurements. Linear combinations of the average power spectra of the electric and magnetic field are employed for the inverse problem solution emphasizing in this way distance dependence or basic SR peaks. Ratios between the average electric and magnetic spectra and between their linear combinations, which enable to climinate the source spectrum influence, have been considered for the solution of the inverse problem. Influence of errors in the source model and propagation parameters has numerically been studied on the recovered field spectra values of the total lightning intensity and its distance profile.