在方向角定位方案中,基地台上安装有天线阵列,测量电波的到达角度(Arrival of Angle,AOA),则可以确定基地台与移动台之间的径向连线,即测位线,两条测位线的交点就是移动台的位置。
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然而,当太阳每天沿着着地平线转动时,阳光只能以很低的角度到达南极大陆,将这里的冰山制造出长长的影子,投射在周围的海冰之上。
The light arrives at a low angle, however, as the Sun makes a daily circuit around the horizon, and icebergs cast long shadows over the surrounding sea ice.
到达第一条发线时,开始沿朝向你的角度剪。
When the first fade line is reached, cut at an Angle bringing the clippers towards you.
摄影提示:提前到达,选好位置和角度。
Photo Tip: Arrive early to scout out your location and choose your vantage point.
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