Radio Science Center for Space and Atmosphere, Kyoto University
National Astronomy Observatory
Radio Science Center for Space and Atmosphere, Kyoto University
Graduate School of Informatics, Kyoto University
the Nippon Meteor Sciety
出版者
宇宙科学研究所
出版者(英)
Institute of Space and Astronautical Science
雑誌名
The Institute of Space and Astronautical Science report. S.P. : Proceedings of the 2002 International Science Symposium on the Leonid Meteor Storms
巻
15
ページ
129 - 135
発行年
2003-03
抄録(英)
Meteor trail and head echo observations during the Leonid shower periods have beencarried out using the middle and upper atmosphere (MU) radar, Shigaraki, Japan (35N, 136E) since1990 and 1998, respectively. In 1998, 1999 and 2001, peak activities of Leonid meteor showers wereobserved with the same observational set-up. Characteristics of the outburst in the three yearsare displayed. The wind velocity profiles between 80 and 100 km altitudes were simultaneouslydetermined with I km height and 30 minutes time resolutions with underdense meteor echoes.Significant local time variations in the orders of day-to-day, and year-to-year of the wind velocityproflle and wind shear are exhibited, as they would affect significantly the evolution of persistenttrain.