夜间观测时天体周围没有其他天体的天空部分。
天空背景辐射亮度测量与研究_stmopen 关键词】: 天空背景 辐射亮度测量 辐射计 [gap=698]Keywords】: sky background,radiance luminance measurement,radiometer
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通过理论推导得到了竖直方向上白天天空背景光光强计算公式。
The function of background irradiance at vertical direction in daytime is obtained through theoretical analysis.
比如当画面上的树叶在亮色天空背景下摇曳时,叶片的边缘部分会出现光点。
For example, when tree leaves are blowing in the wind, the leaves may appear to artificially shimmer at the edges of the leaves.
她卧室的窗户对着州议会大厦的圆顶,它灯火通明地衬在黑暗的天空背景之上。
Her bedroom window faced the state-capitol dome, brightly lit against the dark sky.
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