著者

堤 四郎 竹屋 芳夫 黒田 託三 TUTUMI Shirou TAKEYA Yoshio KURODA Takumi

出版者

東京大学宇宙航空研究所

雑誌

東京大学宇宙航空研究所報告 (ISSN:05638100)

巻号頁・発行日

vol.8, no.1_B, pp.74-86, 1972-03

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The basic chemical processes and engineering techniques concerning with the generation of the artificial cesium plasma clouds in the upper atmosphere were investigated. After some prior ground tests, it was designed and constructed the effective rocket- born type vapourizer as to be satisfied the requrement of payload conditions. The total chemicals weighted 8. 1 kg consist of cesium nitrate, aluminium granuels and sodium nitrate with small percentage. The K-9 M-33 rocket carrying this payload and another barium cloud source was launched on 26, Aug. 1971, at Kagoshima Space Center at 19 35 JST. Visible and photogenic plasma clouds were successfully created at the altitude of 117 km and 240 km, respectively. The optical data was obtained for the period of about 300 sec. at the five observing points. HF Radio wave tracking for them was tried by the some facilities, ionosonde at K. S. C. and syncronous receivers at K. S. C. and Nishinoomote City and ionospheric facility at Yamakawa, simultaneously operated. The echoing traces accompanied with the generation of the plasma clouds were appered for the period of about 13 min. in the records of Yamakawa Station. The predicted electron density at the initial phase of the Cs plasma cloud was consistent with observational results.