主要用于航空测量、航空遥感、卫星海洋观测、航天侦察、图像匹配制导等。
Its mainly used in air survey, aviation remote sensing, satellite sea observation, astronautics reconnaissance, picture match guidance and so on.
航天侦察和测绘是战略武装必不可少的组成部分，航天侦察和测绘相机是对地观测卫星的有效载荷。
Space reconnaissance and mapping are essential elements of strategic missions. Space reconnaissance camera and mapping camera are payloads of earth observation satellites.
信号情报侦察卫星用于侦收地面雷达、通信和测控等系统所辐射的电磁信号并对其 定位，是航天侦察的重要手段。
SIGINT(Signal Intelligence) satellite is used to detect, intercept a nd locate electromagnetic(EM) signals radiated by systems such as ground radar, communication and TT&C systems.
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