Chinese have long recognized the importance of retrievable reconnaissance satellites.

中国很早就认识到返回式侦察卫星的重要性。

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Research on Photo-reconnaissance Satellites Scheduling Problem for Area Targets Observation;

论述了面向区域目标普查的卫星日常调度问题的预处理过程。

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The low earth orbit is mostly occupied by military reconnaissance satellites for it is convenient to collect intelligence information.

由于地球低轨道更利于收集情报信息，大多被军事侦察卫星所占有。

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For example, information-gathering tools, such as reconnaissance satellites and the associated support systems, require substantial and sustained financial commitments.

CENTERFORSECURITYPOLICY: Center for Security Policy | Chinese Information Warfare: A Phantom Menace or Emerging Threat? | Page: 5

The replacement of reconnaissance satellites was delayed until it became a crisis.

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For instance, one reason Washington is often surprised when countries like Pakistan test nuclear weapons is that other governments have a good idea what times of the day they are within range of U.S. photo-reconnaissance satellites, and so they conduct sensitive operations while the satellites are out of range.

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