Decision HEIGHT (DH) 2, an altitude used during a precision approach to trigger the decision of either landing or go-around.

决断高(DH) 2，精密进近时产生继续着陆还是复飞决定的高。

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This dissertation investigates on the method of using electro-optical cameras to integrate SINS to realize high-precision navigation and landing guidance.

本文研究了利用光电传感器拍摄地标点来校正SINS，从而实现高精度着陆引导或导航的方法。

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Simulation results show that the designed system can satisfy the precision requirement for the longitudinal automatic landing, and has good dynamic and static features.

仿真结果表明，所设计的自动着陆纵向模糊控制系统能满足飞机自动着陆的精度要求，且具有良好的动态、静态特性。

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Precision in landing was important because NASA chose a relatively tight area for Curiosity's arrival: The Gale Crater, which contains an 18, 000-foot high mountain about 7.5 miles south of the landing site.

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When to let a pilot know his landing is aborted requires precision timing--turn him away too soon and, given the nature of aerodynamics, the plane will smash into the deck or the water.

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It was a precision job, like landing on the Moon, as the team lowered into Erte Ale and recorded the first ever 3D laser scan of this remarkable volcano.

BBC: Inside the hottest place on Earth