Characterization of the mesospheric sodium layer at La Palma
Characterization of the mesospheric sodium layer at La Palma
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DOI：
10.1046/j.1365-8711.2001.04703.x
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发表时间：
2001-12-21
影响因子：
4.8
通讯作者：
Wooder, NJ
中科院分区：
文献类型：
--
作者：
Michaille, L;Clifford, JB;Wooder, NJ
我们介绍了从1999年9月到2000年8月在拉帕尔马进行的一项中层钠监测计划的结果，该计划通过五个运动进行，每个运动一周。给出了该层的年平均参数（钠柱密度和宽度）。我们表明，层的短时间尺度动力学是由平均频率为每晚一个事件的零星层控制的。定量研究了层的短时间尺度动力学对威廉·赫歇尔望远镜自适应光学系统的影响。在离焦误差方面，这似乎是一个很小的影响。最后，我们介绍了英仙座流星雨期间获得的数据，并表明钠层的动力学随着流星活动而发生转变。
We present the results of a mesospheric sodium monitoring programme at La Palma carried out through five campaigns of one week each, from 1999 September to 2000 August. The yearly averaged parameters of the layer (the sodium column density and the width) are given. We show that the short time-scale dynamics of the layer are governed by the sporadic layers with an average frequency of one event per night. The influence of the short time-scale dynamics of the layer on an adaptive optics system working on the William Herschel Telescope is quantified. It appears that it is a small effect in terms of defocus error. Finally, we present data obtained during the Perseid meteor shower and show that the dynamics of the sodium layer undergoes a transition with the meteoric activity.