HR: 1340h
AN: AE23A-0906    [Abstracts]
TI: VLF EM signatures recorded by DEMETER at the time of ISUAL TLEs
AU: * Parrot, M
EM: mparrot@cnrs-orleans.fr
AF: LPCE/cnrs, 3A Avenue de la Recherche, Orleans, 45071, France
AU: Frey, H
AF: Space Sciences Lab., Univ. of California, 7 Gauss Way, Berkeley, 94720-7450, United States
AU: Takahashi, Y
EM: yukihiro@pat.geophys.tohoku.ac.jp
AF: Geophysics Dept., Tohoku Univ., Aramaki-aoka, Sendai, 980-8578, Japan
AU: Chen, A
AF: Physics, National Cheng Kung Univ., University Road, Tainan, 701, Taiwan
AU: Hsu, R
EM: rrhsu@phys.ncku.edu.tw
AF: Physics, National Cheng Kung Univ., University Road, Tainan, 701, Taiwan
AU: Su, H
EM: htsu@phys.ncku.edu.tw
AF: Physics, National Cheng Kung Univ., University Road, Tainan, 701, Taiwan
AB: DEMETER is an ionospheric micro-satellite launched on a polar orbit at an altitude of 710 km in June 2004. Its main scientific objectives are to study the ionospheric perturbations in relation with seismic and anthropogenic activities. Therefore, its scientific payload allows to measure electromagnetic waves and plasma parameters all around the Earth except in the auroral zones. There are two modes: a survey mode where only spectra with low frequency (~ 20 Hz) and time (2 s.) resolution are available and a burst where waveforms up to 20 kHz are recorded. The ISUAL (Imager of Sprites and Upper Atmospheric Lightning) experiment on FORMOSAT 2 (the former ROCSAT 2) determines spatial, temporal and spectral properties of lightning induced upper atmospheric TLEs (Transient Luminous Events): sprites, elves, blue jets, etc. FORMOSAT 2 has been launched in May 2004 onto a Sun-synchronous orbit located at 890 kilometers. The two satellites cover the same time period but they are not synchronized and simultaneous observations are only possible when DEMETER is at two specific locations beyond the coast of Chili and beyond the east coast of Australia. At these two locations the two satellites are magnetically conjugated (FORMOSAT 2 being in the Northern hemisphere). This paper will show the characteristics of some events simultaneously observed by the two satellites (Electromagnetic emissions and TLEs).
DE: 2411 Electric fields (2712)
DE: 2435 Ionospheric disturbances
DE: 3304 Atmospheric electricity
DE: 3324 Lightning
SC: Atmospheric and Space Electricity [AE]
MN: 2007 Fall Meeting