Flight Routes


每次回国坐飞机都不明白为什么路线不是横穿太平洋,而是从美国西海岸向北,沿阿拉斯加,俄罗斯,向南到北京。今天的Cartography课学习地球上两点间最短距离的圆弧。你拿一个平面,经过地心得把地球切成两半,如果那两点坐落在切出来的轨迹上,那得到的圆弧就应该是两点间最短的路程。同时,飞机的航线要尽量减少变换方位角,尽量朝一个方向飞。又要路程短又要方向一致,满足这两个条件后,就得到了我们现在采用的路线。

A great circle is the most economical route to follow when
traveling on the earth. However, it is not practical for pilots to change
course continuously. In order for ships and aircraft to follow the great circle
route between two points as closely as possible, movement is directed along a
series of constant azimuths that approximate the great circle route.

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5 则回应给 Flight Routes

  1. Frank说道:

    this is taught in first grade high school…

  2. Yao说道:

    没上过高中嘎嘎~

  3. Di说道:

    great circle path

  4. 320说道:

    是吗?我知道了,谢谢.

  5. zhc说道:

    那如果不是规则的球面呢?或者说根本没有球心?哈哈,很复杂的.(数学家都是外星人)

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