a satellite with sensors to detect nuclear explosions
A spy satellite (officially referred to as a reconnaissance satellite) is an Earth observation satellite or communications satellite deployed for military or intelligence applications. These are essentially space telescopes that are pointed toward the Earth instead of toward the stars.
例句与用法
1.
Last september reports emerged that china had been pointing high - powered lasers at american spy satellites passing over its territory 据去年九月份的报告，中国已经用高能量激光探照经过其上空的美国侦察卫星。
2.
In the first , this article introduces the knowledge of orbit designing , then this article summarizes the basic methods and principles of orbit designing . in the later , this article describes the conception of node period about orbit designing emphatically which has been advanced by the writer . at the same time , this article describes the process of the writer ' s analysing and designing the orbit of earth spying satellite particularly with the conception . in the last , this article describes the wirter ' s analysing and simulating the designing results 本文首先介绍了轨道设计的基本知识，然后总结了轨道设计的基本的方法和原则。在随后部分重点对卫星轨道设计中交点周期的概念提出了自己的看法，同时应用此结果详细分析和设计了对地侦察卫星的太阳同步回归轨道，最后对此设计结果进行详细仿真分析。
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