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Estimation of lightning and sprite parameters based on observation of sprite-producing lightning power spectra
Authors:VV Surkov  Y Matsudo  M Hayakawa  SV Goncharov
Institution:1. ESAC-ESA, Villafranca del Castillo, PO Box 78, Villanueva de la Cañada, E-28691 Madrid, Spain;2. Aarhus University, Nordre Ringgade 1, 8000, Aarhus, Denmark\n;3. Technische Universität, Zentrum für Astronomieund Astrophysik, Hardenbergstraße 36, D-10623, Berlin, Germany;4. IAPS-INAF, Via Fosso del Cavaliere 100, 00133, Rome, Italy;1. Planetary Aeronomy, Belgian Institute for Space Aeronomy, 3 av. Circulaire, 1180 Brussels, Belgium;2. Fonds National de la Recherche Scientifique, 5 rue d''Egmont, 1000 Brussels, Belgium;3. LATMOS, 11 Bd d''Alembert, 78280 Guyancourt, France;1. Space Research Institute (IKI), Profsoyuznaya 84/32, 117997 Moscow, Russia;2. LATMOS, CNRS/INSU - IPSL - Univ. Pierre & Marie Curie - Univ. Versailles Saint-Quentin, Université Paris-Saclay, 11 Boulevard d''Alembert F-78280 Guyancourt, France;3. Moscow Institute of Physics and Technology (MIPT), Dolgoprudny, Russia
Abstract:Spectrograms and ELF power spectra of magnetic variations originated from sprite-producing lightning discharges have been analyzed to extract both parent lightning and sprite parameters. Some of the spectrograms and power spectra have been found to have approximately quasi-oscillatory shape in the frequency range 0–40 Hz with maximum repetition period about 15–20 Hz. A theory predicts that this interesting peculiarity of the power spectra can be due to interference between electromagnetic fields originated from the parent lightning discharge and from the sprite. A smooth envelope of the power spectrum was shown to have a form of damped oscillations with period close to reciprocal value of sprite lag time. A technique of extracting sprite parameters based on the sprite-producing lightning power spectrum is proposed. The lack of the first Schumann resonance and other features occasionally observed in spectral resonance structure were also discussed.
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