确定火球终端高度的新方法
New methodology to determine the terminal height of a fireball
摘要：
尽管与流星体进入大气层有关的烧蚀和拖曳过程是上个世纪深入研究的一个主题，但很少有人注意解释观测到的火球终端高度。这是一个关键参数，因为它不仅取决于初始质量，而且还取决于流星体的整体物理特性，因此也取决于它们在大气层中烧蚀的能力。在这项工作中，我们已经开发出一种新的方法，使用火球终端高度观测的陨石观测和回收项目在加拿大1970-1985年之间（以下简称MORP）进行测试。然后我们将它们与计算结果进行比较。我们的研究结果清楚地表明，新方法能够预测流星体在地球大气层中的加深程度。然后，这种方法有重要的应用在预测的影响危险，从厘米到米大小的机构表示，部分，在MORP火流星名单。
英文摘要：
Despite ablation and drag processes associated with atmospheric entry of meteoroids were a subject of intensive study over the last century, little attention was devoted to interpret the observed fireball terminal height. This is a key parameter because it not only depends on the initial mass, but also on the bulk physical properties of the meteoroids and hence of their ability to ablate in the atmosphere. In this work we have developed a new approach that is tested using the fireball terminal heights observed by the Meteorite Observation and Recovery Project operated in Canada between 1970-1985 (hereafter referred as MORP). We then compare them to the calculation made. Our results clearly show that the new methodology is able to forecast the degree of deepening of meteoroids in the Earth's atmosphere. Then, this approach has important applications in predicting the impact hazard from cm- to meter-sized bodies that are represented, in part, in the MORP bolide list.
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