GNGTS 2021 - Atti del 39° Convegno Nazionale

203 GNGTS 2021 S essione 2.1 References Al’pert, Ya. L., Guseva, E. G. and Fligel, D. S.; 1967: Propagation of LF electro-magnetic wavaguide , Akademy of Sciences of the U.S.S.R. Bauer, S. J.,; 1958: The apparent ionospheric response to the passage of hurricanes . J. Geophys. Res., 63 , 265-269. Beukers, J. M.; 1974: A review and application of VLF and LF transmission for navigation and tracking , J. Inst. Nav., 21 (2), 117-133. Biagi, P. F., Ermini, A. and Kingsley, S. P.; 2001: Disturbances in LF radio signals and the Umbria-Marche seismic sequence in 1997-1998 . Phys. Chem. Earth (C), 26 (10-12), 755. Blair, B. E., Crow, E. L. andMorgan, A. H.; 1967: Five years of VLF world-wide comparison of atomic frequency standards . Radio Sci., 2 , 627-636. Casselman, C. J., Heritage, D. P. and Tribbals, M. L.; 1959: VLF propagation measurements for the Radux- Omega navigation system , Proc. IRE, 47 , 829-839. Das, B., Sarkar, S., Haldar, P. K., Midya, S. K. and Pal, S.; 2021: D-region ionospheric disturbances associated with the Extremely Severe Cyclone Fani over North Indian Ocean as observed from two tropical VLF stations . Advances in Space Research, 67 , 75-86. Davies, K. and Baker, D. M.; 1965: Ionospheric effects observed around the time of the Alaskan earthquake of March 28 . J. Geophys. Res., 70 , 2251-2253. Davis, R. M. and Berry, L. A.; 1977: A revised model for electron density in the lower ionosphere . Command and Control Technical Center (DCA), Tech. Rep. 111077. Fidani, C.; 2011: The Central Italy Electromagnetic Network and the 2009 L’Aquila earthquake: observed electric activity . Geosci., 1 , 3-25. Fidani, C.; 2018: Improving Earthquake Forecasting by Correlations Between Strong Earthquakes and NOAA Electron Bursts , TAO, 29 (2), 117-130. Foley, G., Wand, I. C. and Jones, T. B.; 1973: Studies of modal parameters of modal VLF radio waves propagated below the night-time ionosphere . J. Atm. Terr. Phys., 35 , 2111-2122. Hayakawa, M., Kasahara, Y., Nakamura, T., Muto, F., Horie, T., Maekawa, S., Hobara, Y., Rozhnoi, A. A., Solovieva, M. and Molchanov, O. A.; 2010: A statistical study on the correlation between lower ionospheric perturbations as seen by subionospheric VLF/LF propagation and earthquakes . J. Geophys Res., 115 , A09305. Inan, U. S., Cummer, S. A. andMarshall, R. A.; 2010: A survey of ELF and VLF research on lightning-ionosphere interactions and causative discharges . J. Geophys. Res., 115 , A00E36. Maekawa, S., Horie, T., Yamauchi, T., Sawaya, T., Ishikawa, M., Hayakwa, M. and Sasaki, H.; 2006: A statistical study on the effect of earthquakes on the ionosphere, based on the subionospheric LF propagation data in Japan . Ann. Geophsicae, 24 , 2219-2225. Molchanov, O. A. and Hayakawa, M.; 1998: Subionospheric VLF signal perturbations possibly related to earthquakes . J. Geophys. Res., 103 , 17,489-17,504. Morfitt, D. G.; 1977: Effective electron density distributions which describe VLF/LF propagation data . Naval Ocean System Center Tech. Rep. TR141. NaitAmor, S., Cohen, M. B., Kumar, S., Chanrion, O. and Neubert, T.; 2018: VLF Signal Anomalies During Cyclone Activity in the Atlantic Ocean . Geophys. Res. Lett., 45 (10), 185-210. Pal, S., Sarkar, S., Midya, S. K., Mondal, S. K. and Hobara, Y.; 2020: Low-Latitude VLF Radio Signal Disturbances Due to the Extremely Severe Cyclone Fani of May 2019 and Associated Mesospheric Response . J. Geo. Res. Space Phys., 125 , 5. Pappert, R. A.; 1970: Effects of elevation and ground conductivity in horizontal dipole excitation of the Earth-ionosphere waveguide . Radio Sci. 5 , 579-590. Pappert, R. A. and Bickel, J. E.; 1970: Vertical and horizontal VLF field excited by dipoles of arbitrary orientation and elevation . Radio Sci. 5 , 1445-1452. Wait, J. R.; 1964: Two dimensional treatment of mode theory of the propagation of VLF radio waves . NBS J. Res., 68D , 81-93.

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