A search for E-region disturbances induced by ion cloud releases at F-region heights |
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| Affiliation: | 1. Pakistan Space and Upper Atmosphere Research Commission (SUPARCO), Karachi, Pakistan;2. Virtual University, M.A. Jinnah Campus, Defence Road, Off Raiwind Road, Lahore, Pakistan;3. Institute of Space Science and Technology, University of Karachi, Karachi 75270, Pakistan;4. Bureau of Meteorology, Space Weather Services, PO Box 1386, Haymarket, NSW 1240, Australia;5. China Research Institute of Radiowave Propagation (CRIRP), P.O. Box 6301, Qingdao 266107, China;1. The Abdus Salam International Centre for Theoretical Physics T/ICT4D, Strada Costiera 11, 34151 Trieste, Italy;2. Physics Department, University of New Brunswick, E3B5A3 Fredericton, Canada |
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| Abstract: | Theory indicates that following the release of an ion cloud at F-region heights, the electron density of the E-region is disturbed due to electron transfer between the cloud and its electrostatic image. Attempts to detect these disturbances experimentally from their associated optical emissions have however been rather inconclusive. By means of a sensitive radiowave technique, marked localized E-region disturbances have been detected following the release of ion clouds. The effect occurs for both barium and caesium clouds and is present at both temperate and high latitudes. The time of onset and the duration of the measured events is consistent with theoretical predictions for image-like disturbances. |
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