Collaborative Research: High-Time-Resolution Resonance Lidar Detection of Meteor Trails

通过流星尾迹激光雷达观测，对中间层上部和热层下部流星烧蚀产生的金属沉积进行了量化，并探讨了量化的流星沉积与长寿命金属层之间的关系。所需的观测是在阿雷西博天文台升级共振激光雷达系统完成的。现存的钾共振激光雷达系统首先被修改为采样每一个激光雷达返回脉冲，提高光束内的时间分辨率为35毫秒和高度分辨率为150米，在上层中间层。升级后，包括实时信号处理算法的开发和应用，Fe，Ca，Ca+和Na激光雷达系统也进行了升级。流星尾金属的金属含量在零星层的比例是用来提高我们的理解的动态和化学过程，导致在大气层中的金属层。流星尾迹金属沉积率也被用来计算全球范围内直接沉积到大气中的金属。

Metallic deposition by meteor ablation in the upper mesosphere and lower thermosphere is quantified by lidar observations of meteor trails, and the relationship between the quantified meteoric deposition and long-lifetime metallic layers is explored. The required observations are accomplished with upgraded resonant lidar systems at the Arecibo Observatory. The extant potassium resonant lidar system is first modified to sample every lidar return pulse, improving temporal resolution within the beam to 35 ms and altitude resolution to 150 m in the upper mesosphere. Following that upgrade, including development and application of real-time signal processing algorithms, the Fe, Ca, Ca+, and Na lidar systems are also upgraded. The ratios of meteor tail metals to metallic content in sporadic layers is used to improve our understanding of the dynamic and chemical processes that lead to metallic layering in the atmospheric region. The meteor trail metallic deposition rate is also used to calculate direct metallic deposition to the atmosphere on a global scale.