Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Evening Poster

P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM18] Physics and Chemistry in the Atmosphere and Ionosphere

Tue. May 22, 2018 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Takuya Tsugawa(National Institute of Information and Communications Technology), Seiji Kawamura(国立研究開発法人 情報通信研究機構)

[PEM18-P08] Ionospheric model investigation on the VLF/LF field strength prediction using the wave-hop theory

*Kenro Nozaki1 (1.National Institute of Information and Communications Technology)

Keywords:VLF/LF , field strength , wave-hop theory , ionosphere model

The numerical VLF/LF radio wave field strength prediction program by means of wave-hop theory, which included in the recommendation of the International Telecommunication Union Radiocommunications Sector (ITU-R), widely employs a parabolic model on the lower ionospher. Some parameter sets on the ITU-R method fairly agree with the measurement, however, some modification is needed for correct agreement. IRI model with D-layer option is the best fit for the LF signal variation received after the 2011 Tohoku Earthquake. The electric field at the receiving point consists of a ground wave and sky waves. Diurnal variation for some ranges exceeding the ground wave and 1-hop sky wave is considered on both observational and numerical results.