合成孔径雷达

美国宇航局（NASA）'s AirSAR合成孔径雷达装载于一架DC-8飞机的侧面

合成孔径雷达（英语：synthetic aperture radar, SAR），又译成合成口径雷达或合成开口雷达（日本），属于一种微波成像雷达，也是一种可以产生高分辨率图像的（航空）机载雷达或（太空）星载雷达。它在早期系使用透镜成像机制在底片（胶卷）上形成影像，目前则以复杂的雷达数据后处理方法来获得极窄的有效辐射波束（对产生的雷达图像意味着极高的空间分辨率）。它一般安装在移动的载体上对相对静止的目标成像，或反之。自合成孔径雷达发明以来，它被广泛的应用于遥感和地图测绘。

单词	Synthetic aperture radar
释义	Synthetic aperture radar 原声例句科学60秒 2018年11月合集 Specifically, a type called synthetic aperture radar, which works day and night, and through clouds. 具体来说，就是一种合成孔径雷达，它可以夜以继日地工作，还可以穿越云层工作。科学杂志：地质学 The technology capturing these images, Synthetic aperture radar—also known as SAR—is booming. 捕获这些图像的技术，即合成孔径雷达（也称为 SAR）正在蓬勃发展。经济学人 Science and technology Synthetic aperture radar (SAR) satellites, which send out radar pulses rather than relying on ambient light, would pick up the metallic reflections of heightened vehicle activity. 合成孔径雷达（SAR）卫星发出雷达脉冲而不是依赖环境光，它会捕捉到车辆活动增强时产生的金属反射。中级英语短文 The satellite is also the world's first high-orbit synthetic aperture radar (SAR) satellite entering the project implementation stage, and it will be mainly used to provide remote sensing information services. 该卫星也是世界上第一颗进入项目实施阶段的高轨道合成孔径雷达（SAR）卫星，它将主要用于提供遥感信息服务。中文百科合成孔径雷达合成孔径雷达（英语：synthetic aperture radar, SAR），又译成合成口径雷达或合成开口雷达（日本），属于一种微波成像雷达，也是一种可以产生高分辨率图像的（航空）机载雷达或（太空）星载雷达。它在早期系使用透镜成像机制在底片（胶卷）上形成影像，目前则以复杂的雷达数据后处理方法来获得极窄的有效辐射波束（对产生的雷达图像意味着极高的空间分辨率）。它一般安装在移动的载体上对相对静止的目标成像，或反之。自合成孔径雷达发明以来，它被广泛的应用于遥感和地图测绘。英语百科 Synthetic aperture radar 合成孔径雷达 Synthetic aperture radar (SAR) is a form of radar which is used to create images of objects, such as landscapes – these images can be either two or three dimensional representations of the object. SAR uses the motion of the radar antenna over a targeted region to provide finer spatial resolution than is possible with conventional beam-scanning radars. SAR is typically mounted on a moving platform such as an aircraft or spacecraft, and has its origins in an advanced form of side-looking airborne radar (SLAR). The distance the SAR device travels over a target in the time taken for the radar pulses to return to the antenna creates the large "synthetic" antenna aperture (the "size" of the antenna). As a rule of thumb, the larger the aperture is, the higher the image resolution will be, regardless of whether the aperture is physical (a large antenna) or 'synthetic' (a moving antenna) – this allows SAR to create high resolution images with comparatively small physical antennas.
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Synthetic aperture radar

合成孔径雷达

Synthetic aperture radar 合成孔径雷达