Sun elevation: the higher the sun in the sky, the higher the UV radiation level.
太阳高度：太阳在空中越高，紫外线辐射水平就越高。
At any point, if the sun elevation or sun azimuth errors or the momentum vector error exceeds tolerances, the ACS will return to an appropriate mode in order to correct the problem.
在任何时间点，如果太阳仰角或是太阳方位角的错误或是动量向量的错误超过容忍度时，那么ACS将会为了修正此问题而回到适当的模式。
The red stripe is caused by a the interplay of light and cloud in the Canadian Rockies. The light-reflecting nature of the clouds coupled with low sun elevation resulted in this startling effect.
红色条纹是加拿大落基山脉光与云相互作用所致。
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