A screw-like meteoric train photographed by double-station observations |
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| Institution: | 1. School of Geography, Earth and Environmental Sciences, Plymouth University, Plymouth PL4 8AA, UK;2. Camborne School of Mines, CEMPS, University of Exeter, Tremough Campus, Penryn, Cornwall TR10 9EZ, UK;3. Helford Geoscience LLP, Menallack Farm, Treverva, Penryn, Cornwall TR10 9BP, UK;1. HydroSciences UMR 5569, CNRS, Universités Montpellier I & II, IRD, Place Eugène Bataillon, CC MSE, 34095 Montpellier Cedex 5, France;2. Géosciences UMR 5243, CNRS, Universités Montpellier II, Place Eugène Bataillon, CC 60, 34095 Montpellier Cedex 5, France;3. Géosciences Environnement Toulouse UMR 5563, Université Paul Sabatier, CNRS, IRD, 14 Avenue Edouard Belin, 31400 Toulouse, France |
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| Abstract: | The double-station observation of a meteor is a kind of method for measuring the physical parameters of the meteor effectively. Four special groups of photographs about meteoric trains taken at two stations during Leonids 2001 have been collected. One representative group of them has been measured and analyzed in detail. The results reveal that this train has a screw-like structure and looks to have many spoke beams. The train moves forward in the form of left-hand screw. The horizontal drift velocity northward is 29.6 m s?1 and the vertical drift velocity upward is 12.3 m s?1. In addition, the material of the meteoric train has an outward expanding velocity up to about 79 m s?1. The possible explanation is that the persistent meteoric train is disturbed by the high altitude wind. |
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