| 摘要 |
<p>A flyability index represents a quantified low level flight risk associated with each data post in a digital terrain elevation data (DTED) aircraft flight system. Data posts immediately surrounded by terrain slope approximately equal to or less then the climb or dive angle capability of the aircraft have a zero flyability index, and thereby indicate no risk to a low level, set clearance terrain following flight thereover. As the surrounding terrain rises or descends at a greater rate, i.e., greater than aircraft capability, the flyability index values increase to show increasing risk in low level, e.g., terrain following, flight thereover. The illustrated method of transformation provides a single flyability index value for association with each data post of interest, and can be thereby easily integrated into an existing DTED database system. <IMAGE></p> |
