ELF and VLF wave generation by modulated HF heating of the current carrying lower ionosphere |
| |
| Affiliation: | 1. Saint-Petersburg State University, Saint-Petersburg, Peterhof, 198504, Russia;2. A.Ya. Usikov Institute for Radio-Physics and Electronics, National Academy of Sciences of the Ukraine, Kharkov, 61085, Ukraine;3. Hayakawa Institute of Seismo Electromagnetics Co. Ltd.(Hi-SEM), The University of Electro-Communications (UEC) Alliance Center #521, Advanced & Wireless and Communications Research Center, UEC, Chofu, Tokyo, 182-8585, Japan;1. Dipartimento di Scienze Chimiche e Farmaceutiche, Universita di Ferrara, Via Fossato di Mortara 17, I-44121 Ferrara, Italy;2. Laboratoire de Chimie et Physique Quantiques, Université Paul Sabatier, 118 route de Narbonne, F-31062 Toulouse Cedex, France;1. College of Information Science and Engineering, Northeastern University, Wenhua Str. 3, Shenyang, China;2. Department of Information Technology, Uppsala University, S:t Olofsgatan 10 B, Uppsala, Sweden |
| |
| Abstract: | This paper presents further experimental results on ionospheric current modulation, using powerful amplitude modulated HF waves produced by the new heating facility at Ramfjordmoen near Tromsø, Norway. As a result of the current modulation, waves in the ULF, ELF and VLF range can be efficiently generated. The experiments discussed here cover the range from low ELF up to 7 kHz. The observed signal strengths are of the order 1 pT. Decomposition of the received ELF/VLF waves into R- and L-mode shows that both modes are usually of comparable strength. The signal strength as a function of modulation frequency shows pronounced maxima at multiples of approximately 2 kHz. The paper also presents a brief theoretical discussion of the processes involved in the generation of ELF/VLF waves by HF induced current modulation. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
