This gives the Joint STARS aircraft higher operational altitude and longer mission duration, while significantly reducing the maintenance burden of the older engines.

这使联合星飞机飞得更高，延长执行任务的持续时间，同时大大降低了旧发动机的维护负担。

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Terrain defilade is a key factor for early warning system (EWS) in detecting low altitude targets, effective algorithm provides the foundation of operational simulation.

地形遮蔽是影响预警探测系统发现目标能力的关键因素。有效算法是实施模拟仿真的基础。

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It will take about three months for Nasa engineers to test the platform and get it ready for use at its operational altitude of 705km.

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