講演情報
[PEM06-22]ISS-IMAPによる撮像観測とレーダーとGPSによる地上観測との同時観測
*齊藤 昭則1、山崎 敦2、坂野井 健3、吉川 一朗4、大塚 雄一5、山本 衛1、中村 卓司6、秋谷 祐亮1、穂積 裕太1 (1.京都大学、2.宇宙科学研究所、3.東北大学、4.東京大学、5.名古屋大学、6.国立極地研究所)
キーワード：
Ionosphere、Airglow、Atmospheric Gravity Wave、Plasma Bubble、Radar、GPS
ISS-IMAP mission is a space-borne mission to investigate the mesoscale structures in the ionosphere, the mesosphere, and the plasmasphere by imaging observations of instruments on International Space Station. It consists of two imaging instruments. Visible-light and infrared spectrum imager (VISI) observes the airglow in the MTI region. Extra ultraviolet imager (EUVI) observes the resonant scattering from ions in the ionosphere and the plasmasphere. The objective of this mission is to clarify the upper atmospheric structures whose horizontal scale is 50-500km, and the effect of the structures on the space-borne systems in the low- and mid-latitude regions. VISI observes the airglow of 730nm (OH, Alt. 85km), 762nm (O2, Alt 95km), 630nm(O, Alt.250km) in the Nadir direction to investigate the mesoscale structures in the mesosphere and the ionosphere. The coordinated observations of ISS-IMAP with ground-based measurements have been carried out. The MU radar and Equatorial Atmosphere Radar (EAR) observe the ionosphric density structures and field-aligned irregularities while ISS-IMAP observe the large and mesoscale ionospheric structures with the 630nm airglow, and the atmospheric gravity waves in the mesosphere with the 762nm airglow. The two-dimensional distribution of total electron contents derived with the ground-base GPS receiver array is also compared with the ionospheric and mesospheric structures observed by ISS-IMAP. The results of the ISS-IMAP mission by VISI and EUVI, and its coordinated observations with the ground-based instruments will be introduced in the presentation.