How to build a continental scale fireball camera network
How to build a continental scale fireball camera network
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DOI：
10.1007/s10686-017-9532-7
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发表时间：
2017-06-01
影响因子：
3
通讯作者：
Devillepoix, Hadrien A. R.
中科院分区：
文献类型：
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作者：
Howie, Robert M.;Paxman, Jonathan;Devillepoix, Hadrien A. R.
澳大利亚沙漠火球网络的扩展是由一种基于消费者数码相机的新型数字火球天文台的开发实现的。天文台比以前的解决方案更实用，更具成本效益，同时保持高成像性能。这是通过灵活的并行设计方法，仔细关注制造和组装的设计，以及在设计过程的早期考虑安装和维护而实现的。此外，还开发了一种新的长曝光火球天文台授时技术，以消除对单独授时子系统和多台仪器数据集成的需要。液晶快门用于在长曝光期间调制透光率，该透光率在火球图像中嵌入时间码，以确定火球到达时间和速度。利用这些观测站，沙漠火球网络已经扩展到覆盖大约250万平方公里（约澳大利亚的三分之一）。通过2015年底在南澳大利亚的Murrili陨石的系统搜索和大气前进入轨道的计算，天文台和网络的设计得到了验证。本文概述了新型火球观测台的设计、实现和性能。
The expansion of the Australian Desert Fireball Network has been enabled by the development of a new digital fireball observatory based around a consumer digital camera. The observatories are more practical and much more cost effective than previous solutions whilst retaining high imaging performance. This was made possible through a flexible concurrent design approach, a careful focus on design for manufacture and assembly, and by considering installation and maintenance early in the design process. A new timing technique for long exposure fireball observatories was also developed to remove the need for a separate timing subsystem and data integration from multiple instruments. A liquid crystal shutter is used to modulate light transmittance during the long exposure which embeds a timecode into the fireball images for determining fireball arrival times and velocities. Using these observatories, the Desert Fireball Network has expanded to cover approximately 2.5 million square kilometres (around one third of Australia). The observatory and network design has been validated via the recovery of the Murrili Meteorite in South Australia through a systematic search at the end of 2015 and the calculation of a pre-atmospheric entry orbit. This article presents an overview of the design, implementation and performance of the new fireball observatories.