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《Chinese Journal of Space Science》 2005-04
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Ionospheric Disturbances Produced by Artificially Chemical Releases

HUANG Wengeng GU Shifen (Center for Space Science and Applied Research, The Chinese Academy of Sciences, Beijing 100080)  
Active experiments in the ionosphere, which give rise to artificial disturbances of electron density, are usually conducted by the injection of chemical clouds at ionospheric altitudes. Their effect has often been called an ionospheric hole simply to dramatize the localized nature of the disturbances, which had been observed in many experiments. For example, the injection of rocket exhaust neutral molecules into ionosphere, predominantly H2O and H2, can result in ionospheric electron density depletion. Main physical mechanism in these experiments is due to ion and molecule exchange reactions, which enhance the effective rate of recombination of electron. Ionospheric disturbances produced by artificially chemical releases have many applications in radio propagation and exploring ionosphere and plasma physics study. In terms of diffusion process of neutral gas and relevant chemical reactions in terrestrial ionosphere, the theoretical model of ionospheric modification created by active chemical releases is investigated in this paper. The influences of injected H2O and SF6 gas on the ionosphere under exponential atmosphere background are theoretically calculated, respectively. The results show that diffusion process of the injected neutral gas at ionospheric height is very quick, and the two released chemical materials can produce localized electron density depletions in F-regions, and those released materials, which have slow diffusion speed and large chemical reaction rates, will substantially affect ionosphere, and facilitate formation of artificial ionospheric hole.
【Fund】: 中国科学院空间科学与应用研究中心创新课题资助(2401175)
【CateGory Index】: P352
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【References】
Chinese Journal Full-text Database 2 Hits
1 Cao Genmao,Mao Genwang,Sun Anbang,Zhang Bin(School of Astronautics,Northwestern Polytechnical University,Xi'an 710072);A Study of SF_6 Active Interference Technology to Ionosphere and its Releaser[J];Mechanical Science and Technology for Aerospace Engineering;2010-12
2 Hu Yao-Gai Zhao Zheng-Yu Zhang Yuan-Nong (College of Electronic Information,Wuhan University,Wuhan 430079,China);Disturbance effects of some representative chemical releases in ionosphere[J];Acta Physica Sinica;2010-11
【Co-references】
Chinese Journal Full-text Database 2 Hits
1 LEI Ning,SHAN Jian sheng (The 47th Institute of the Fourth Academy of CASC,Xi'an 710025,China);Development and Application of Deep Space Sounding Rocket[J];JOURNAL OF SOLID ROCKET TECHNOLOGY;1999-03
2 HUANG Wengeng GU Shifen (Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100080);Artificially Created Airglow by Neutral Gas Release[J];Chinese Journal of Space Science;2006-02
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