结果表明：可探测星等极限值随观测高度和太阳天顶角的增加接近线性增加；
The results show that the detectable stellar magnitude limits linearly increase with observing height and solar zenith angle.
结果表明：可探测星等极限值随观测高度和太阳天顶角的增加接近线性增加；
The results show that the detectable stellar magnitude limits linearly increase with observing height and solar zenith angle.
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