The auroral absorptions are related to the solar activity.

极光吸收与太阳的活动性密切相关。

The method has been applied to real auroral photometric data.

本文将这方法应用于实际极光亮度数据。

As to auroral hiss, there are upper and lower frequency cut-offs.

极光嘶声则有明显的上截止频率和下截止频率。

More normal auroral rings had been previously imaged around Saturn.

更多正常的土星环行极光被拍摄到。

So scientists have started looking for the cause of the auroral variations.

因此，科学家们已经开始寻找极光变化的原因。