| Автор | Hayakawa, M. |
| Автор | Ohta, K. |
| Автор | Baba, K. |
| Дата выпуска | 1994 |
| dc.description | Detailed wave characteristics (incident and azimuthal angles, wave polarization, and their frequency dependences) of tweek atmospherics have been elucidated on the basis of the application of our field‐analysis direction finding to the VLF data observed in southern China. It is then found that the wave polarization of the first‐order mode at the frequency above its cutoff frequency (ƒ<sub>1c</sub> = 1.7 ∼ 1.8 kHz) is always left handed and it becomes exactly left‐handed circular when the wave frequency decreases down to the ƒ<sub>1c</sub>, together with the fact the incident angle becomes zero (vertical) when the frequency approaches ƒ<sub>1c</sub>. Whereas the zeroth‐order mode at frequency below ƒ<sub>1c</sub> is found to be linearly polarized. These wave properties are first interpreted qualitatively, and then we try to explain them in terms of the full wave theory in the Earth‐ionosphere waveguide in which the realistic electron density profiles of the lower ionosphere are assumed. Finally, it is suggested that the measurement of wave polarization, as given in this paper, would be useful in studying the formation mechanism of tweek tails, the coupling into whistler mode waves of lightning discharges, the lower ionospheric density profile, etc. |
| Формат | application.pdf |
| Копирайт | Copyright 1994 by the American Geophysical Union. |
| Тема | International Conference on Atmospheric Electricity |
| Тема | ATMOSPHERIC PROCESSES |
| Тема | Meteorology and Atmospheric Dynamics: Atmospheric electricity |
| Тема | Meteorology and Atmospheric Dynamics: Lightning |
| Тема | RADIO SCIENCE |
| Тема | Electromagnetic noise and interference |
| Тема | Radio wave propagation |
| Название | Wave characteristics of tweek atmospherics deduced from the direction‐finding measurement and theoretical interpretation |
| Тип | article |
| DOI | 10.1029/93JD02555 |
| Electronic ISSN | 2156-2202 |
| Print ISSN | 0148-0227 |
| Журнал | Journal of Geophysical Research: Atmospheres |
| Том | 99 |
| Первая страница | 10733 |
| Последняя страница | 10743 |
| Выпуск | D5 |
| Библиографическая ссылка | Alpert, Ya. I., Radio Wave Propagation and the Ionosphere, , 1 and 2, Consultants Bureau, New York, 1973. |
| Библиографическая ссылка | Budden, K. G., Radio Waves in the Ionosphere, Cambridge University Press, New York, 1961. |
| Библиографическая ссылка | Budden, K. G., The Propagation of Radio Waves (the theory of radio wave of low power in the ionosphere and magnetosphere), Cambridge University Press, New York, 1985. |
| Библиографическая ссылка | Hayakawa, M., Electromagnetic Wave Engineering, in Japanese, Corona Publishing Company, Tokyo, 1992. |
| Библиографическая ссылка | Hayakawa, M., S.Shimakura, On the mechanism of reflection of ELF‐LF waves from the lower ionosphere, Trans. Inst. Electron. Comm. Eng. Jpn., 61‐E, 15, 1978. |
| Библиографическая ссылка | Hayakawa, M., S.Shimakura, High accuracy method of locating distant lightning by means of tweek atmospherics, 11th Symposium and Exhibition on Electromagnetic Compatibility, 566Minist. of Posts and Telecommun. of the Repub. of Poland, Wroclaw, Poland, 1992. |
| Библиографическая ссылка | Hayakawa, M., K.Ohta, S.Shimakura, Spaced direction finding of nighttime whistlers at low and equatorial latitudes and their propagation mechanism, J. Geophys. Res., 95, 15091, 1990. |
| Библиографическая ссылка | Inan, U. S., W. C.Burgess, T. G.Wolf, D. C.Shafer, Lightning‐associated precipitation of MeV electrons from inner radiation belt, Geophys. Res. Lett., 15, 172, 1988. |
| Библиографическая ссылка | Morfitt, D. G., J. A.Ferguson, F. P.Snyder, Numerical modeling of the propagation medium at ELF/VLF/LF, AGARD Conf. Publ., 305, B2, 1982. |
| Библиографическая ссылка | Ohta, K., M.Hayakawa, Y.Tanaka, Ducted propagation of daytime whistlers as deduced from the ground‐based direction finding, J. Geophys. Res., 89, 7557, 1984. |
| Библиографическая ссылка | Ohta, K., M.Hayakawa, S.Shimakura, T.Tomomatsu, Correlation of whistlers at a low latitude with causative lightnings at conjugate regions, Trans. Inst. Electron. Inf. Commun. Eng. Jpn., B‐II, 276, 1991. |
| Библиографическая ссылка | Okada, T., A.Iwai, M.Hayakawa, The measurement of incident and azimuthal angles and the polarization of whistlers at low latitudes, Planet. Space Sci., 25, 233, 1977. |
| Библиографическая ссылка | Outsu, J., Numerical study of tweeks based on waveguide mode theory, Proc. Res. Inst. Atmos., Nagoya Univ., 7, 58, 1960. |
| Библиографическая ссылка | Pappert, R. A., A numerical study of VLF mode structure and propagation below an anisotropic ionosphere, Radio Sci., 3, 219, 1968. |
| Библиографическая ссылка | Reagan, J. B., R. E.Meyerott, R. C.Gunton, W. L.Imhof, E. E.Gaines, T. R.Larsen, Modeling of the ambient and disturbed ionospheric media pertinent to ELF/VLF propagation, AGARD Conf. Publ., 305, 33, 1982. |
| Библиографическая ссылка | Wait, J. R., Electromagnetic Waves in Stratified Media, Pergamon, New York, 1972. |
| Библиографическая ссылка | Yano, S., T.Ogawa, H.Hagino, Waveform analysis of tweek atmospherics, Res. Lett. Atmos. Electr., 9, 31, 1989a. |
| Библиографическая ссылка | Yano, S., T.Ogawa, H.Hagino, Fading phenomena of whistler waves, Res. Lett. Atmos. Electr., 9, 97, 1989b. |
| Библиографическая ссылка | Yedemsky, D. Y., B. S.Ryabov, A. Y.Shchokotov, V. S.Yarotsky, Experimental investigation of the tweek field structure, Adv. Space Res., 12, 251, 1992. |
