Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1016/j.icarus.2018.09.026 |
| 3D meteoroid trajectories | |
| Sansom, Eleanor K.1; Jansen-Sturgeon, Trent1; Rutten, Mark G.2; Devillepoix, Hadrien A. R.1; Bland, Phil A.1; Howie, Robert M.3; Cox, Morgan A.1; Towner, Martin C.1; Cupak, Martin1; Hartig, Benjamin A. D.3 | |
| 通讯作者 | Sansom, Eleanor K. |
| 来源期刊 | ICARUS
 |
| ISSN | 0019-1035 |
| EISSN | 1090-2643 |
| 出版年 | 2019 |
| 卷号 | 321页码:388-406 |
| 英文摘要 | Meteoroid modelling of fireball data typically uses a one dimensional model along a straight line triangulated trajectory. The assumption of a straight line trajectory has been considered an acceptable simplification for fireballs, but it has not been rigorously tested. The unique capability of the Desert Fireball Network (DFN) to triangulate discrete observation times gives the opportunity to investigate the deviation of a meteoroid's position to different model fits. Here we assess the viability of a straight line assumption for fireball data in two meteorite-dropping test cases observed by the Desert Fireball Network (DFN) in Australia - one over 21 s (DN151212_03), one under 5 seconds (DN160410_03). We show that a straight line is not valid for these two meteorite dropping events and propose a three dimensional particle filter to model meteoroid positions without any straight line constraints. The single body equations in three dimensions, along with the luminosity equation, are applied to the particle filter methodology described by Sansom et al. (2017). Modelling fireball camera network data in three dimensions has not previously been attempted. This allows the raw astrometric, line-of-sight observations to be incorporated directly. In analysing these two DFN events, the triangulated positions based on a straight line assumption result in the modelled meteoroid positions diverging up to 3.09 km from the calculated observed point (for DN151212_03). Even for the more typical fireball event, DN160410_03, we see a divergence of up to 360 m. As DFN observations are typically precise to < 100 m, it is apparent that the assumption of a straight line is an oversimplification that will affect orbit calculations and meteorite search regions for a significant fraction of events. |
| 类型 | Article |
| 语种 | 英语 |
| 国家 | Australia ; Scotland |
| 开放获取类型 | Green Submitted |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000460367200032 |
| WOS关键词 | EARTH-GRAZING FIREBALL ; FALL ; ORBIT ; ABLATION ; DYNAMICS ; TUNGUSKA ; MOTION ; VIDEO ; MODEL |
| WOS类目 | Astronomy & Astrophysics |
| WOS研究方向 | Astronomy & Astrophysics |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/216232 |
| 作者单位 | 1.Curtin Univ, Sch Earth & Planetary Sci, GPO Box U1987, Perth, WA 6845, Australia; 2.Def Sci & Technol Grp, Edinburgh 5111, SA, Scotland; 3.Curtin Univ, Dept Mech Engn, GPO Box U1987, Perth, WA 6845, Australia |
| 推荐引用方式 GB/T 7714 | Sansom, Eleanor K.,Jansen-Sturgeon, Trent,Rutten, Mark G.,et al. 3D meteoroid trajectories[J],2019,321:388-406. |
| APA | Sansom, Eleanor K..,Jansen-Sturgeon, Trent.,Rutten, Mark G..,Devillepoix, Hadrien A. R..,Bland, Phil A..,...&Hartig, Benjamin A. D..(2019).3D meteoroid trajectories.ICARUS,321,388-406. |
| MLA | Sansom, Eleanor K.,et al."3D meteoroid trajectories".ICARUS 321(2019):388-406. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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