BG3 Glass Filter Effects on Quantifying Rapidly Pulsating Auroral Structures
BG3 Glass Filter Effects on Quantifying Rapidly Pulsating Auroral Structures
复制标题
BG3 玻璃滤光片对快速脉动极光结构量化的影响
作者：
M. Samara;R. Michell;D. Hampton
Schott BG 3玻璃滤光片在极光物理学中的广泛应用要求在观测实际极光结构时准确表征滤光片的性能。我们目前的意见，从两个相同的Andor DU-888成像仪并排操作，一个配备了BG 3玻璃过滤器，另一个未过滤，观察相同的极光结构。BG 3玻璃滤光片降低了整体信号水平，使快速脉动极光的相对强度变化增加了几个百分点。然而，这也导致信噪比略有下降，使得更难以量化快速变化的极光结构。这种比较表明，BG 3玻璃过滤器可以是有用的，在动态，明亮的，亚暴发生极光，其中EMCCD成像仪饱和发生的整体信号电平是重要的。因此，它们的使用不会显著影响对极光内部动态的观测，但也不会增强对快速变化的极光结构的特征进行量化的能力。
The extensive use of Schott BG3 glass filters in auroral physics demands an accurate characterization of the filter performance when observing actual auroral structures. We present observations from two identical Andor DU-888 imagers operated side-by-side, one equipped with a BG3 glass filter and the other one unfiltered, observing the same auroral structures. The BG3 glass filter decreased the overall signal levels, increasing the relative intensity variations of the fast pulsating aurora by a few percent. This, however, also produced a slightly decreased signal-to-noise ratio, making it more difficult to quantify the rapidly varying auroral structures. This comparison shows that BG3 glass filters can be useful in reducing the overall signal levels which is important in dynamic, bright, substorm onset aurora, where EMCCD imager saturation has been known to occur. Consequently their use does not significantly affect the observation of the dynamics within the aurora but it also does not enhance the ability to quantify the features of rapidly varying auroral structures.
结合 Reimei 测量对漫射极光结构进行地面观测
DOI：
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发表时间：
2010
期刊：
Ann.Geophys. 28
影响因子：
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作者：
Samara;R.G.Michell;K.Asamura;M.Hirahara;D.L.Hampton;H.C.Stenbaek-Nielsen
通讯作者：
H.C.Stenbaek-Nielsen