@inproceedings{oai:jaxa.repo.nii.ac.jp:00013656,
 author = {畑, 雅恭 and 馬場, 清秀 and 藤井, 隆 and 太田, 健次 and 内匠, 逸 and Hata, Masayasu and Baba, Kiyohide and Fujii, Takasi and Ota, Kenji and Takumi, Ichi},
 book = {宇宙利用シンポジウム, Space Utilization Research: Proceedings of Space Utilization Symposium},
 month = {Mar},
 note = {第22回宇宙利用シンポジウム(2006年1月17日-19日, 日本学術会議6階会議室 六本木、東京), The Twenty-second Space Utilization Symposium (January 17-19, 2006: Science Council of Japan, Roppongi, Tokyo, Japan), Anomalous radiation of environmental electromagnetic waves is reported as portent of earthquakes. We have been measuring electromagnetic signals in ELF frequency range all over Japan in order to predict earthquakes. Because the observed data is very huge, it is difficult to discriminate anomalous signals manually. In this paper, we propose the method to detect anomalous signals by focusing on errors between LPC models and observed signals. On the other hand, it is effective to investigate the generation mechanisms of precursory emissions employing the simultaneous observations both onboard satellite and on the ground. At the satellite altitude (>400km), it is necessary to estimate the possibility that the ELF radio waves emitted from the epicenter can be propagated into the upper ionosphere with enough field strength to be observable. This paper presents some preliminary numerical calculations for field structure of ELF (223Hz) radio waves between the earth and the ionosphere and in the upper ionosphere up to 1,000km., 共催: 日本学術会議, Meeting sponsors: The Science Council of Japan, The Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS)(JAXA), 資料番号: AA0064113039},
 publisher = {宇宙航空研究開発機構宇宙科学研究本部, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)},
 title = {極超長波（ELF Waves）地球放射波の電離層突き抜け特性と衛星による観測について},
 volume = {22},
 year = {2006}
}