TL;DR
This paper challenges the common straight line assumption in meteoroid trajectory modeling, demonstrating its limitations with two fireball events and proposing a novel 3D particle filter approach for more accurate trajectory estimation.
Contribution
It introduces a three-dimensional particle filter method for meteoroid trajectory modeling, moving beyond the traditional straight line assumption, and applies it to real fireball data from the Desert Fireball Network.
Findings
Straight line assumption can cause position divergence up to 3.09 km.
3D modeling reduces trajectory errors significantly.
Traditional methods may misestimate meteorite search regions.
Abstract
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 seconds (\textit{DN151212\_03}), one under 5 seconds (\textit{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…
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