{"id":14259,"date":"2018-02-09T07:11:02","date_gmt":"2018-02-09T06:11:02","guid":{"rendered":"http:\/\/karmaka.de\/?p=14259"},"modified":"2018-10-30T14:44:51","modified_gmt":"2018-10-30T12:44:51","slug":"3d-meteoroid-trajectories","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=14259","title":{"rendered":"3D Meteoroid Trajectories<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"<p>Eleanor K. Sansom, Trent Jansen-Sturgeon, Mark G. Rutten, Phil A. Bland, Hadrien A. R. Devillepoix, Robert M. Howie, Morgan A. Cox, Martin C. Towner, Martin Cupak, Benjamin A. D. Hartig<\/p>\n<p>submitted to Icarus<br \/>\n(abstract changed on 2 July)<\/p>\n<p><a href=\"https:\/\/arxiv.org\/pdf\/1802.02697.pdf\" target=\"_blank\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><br \/>\nUpdate (30 October 2018): <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S001910351830441X\" target=\"_blank\"><strong>LINK<\/strong><\/a><\/p>\n<p>&#8220;Meteoroid modelling of \ufb01reball 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 simpli\ufb01cation for \ufb01reballs, 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\u2019s position to di\ufb00erent model \ufb01ts. Here we assess the viability of a straight line assumption for \ufb01reball data in two meteorite-dropping test cases observed by the Desert Fireball Network (DFN) in Australia \u2013 one over 21 seconds (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 \ufb01lter to model meteoroid positions without any straight line constraints. The single body equations in three dimensions, along with the luminosity<br \/>\nequation, are applied to the particle \ufb01lter methodology described by Sansom et al. (2017). Modelling \ufb01reball 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 \ufb01reball 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 oversimpli\ufb01cation that will a\ufb00ect orbit calculations and meteorite search regions for a signi\ufb01cant fraction of events.\"\n<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Eleanor K. Sansom, Trent Jansen-Sturgeon, Mark G. Rutten, Phil A. Bland, Hadrien A. R. Devillepoix, Robert M. Howie, Morgan A. Cox, Martin C. Towner, Martin Cupak, Benjamin A. D. Hartig submitted to Icarus (abstract changed&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[1302,1181,4270,141,3662],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/14259"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=14259"}],"version-history":[{"count":5,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/14259\/revisions"}],"predecessor-version":[{"id":16749,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/14259\/revisions\/16749"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14259"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}