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卫星云图是气象卫星通过扫描辐射仪等设备对地面云层和地表特征进行探测,并将其信息经地面接收、显示装置还原成的图像,主要分可见光云图和红外云图两种。我们在电视上看到的云图是经过加工处理后的可见光卫星云图。在电视云图上,陆地一般呈绿色,海洋呈蓝色,云层呈白色、暗灰色。云图的颜色反映着天空云层的高低、云层的厚薄、云中冰晶与水滴含量的特征。高云(>6000米)多为冰晶构成,反射强,云层薄而稀疏,云图多呈白色;中云(2000米～6000米)多为水滴、冰晶的混合物,云层较密集均匀,云图多呈浅灰色;低云(<2000米)多为水滴构成,云层浓而厚,有时呈起伏的团块状,云图呈现暗灰色。这样,就可以根据云图的颜色分辨出云团由何种云层构成。若是中低云覆盖,就会是阴天,还有可能降水。云图的形状反映着一定的天气系统。涡旋状云图表明高空受低气压涡状系统控制,在其影响下多为不稳定性降水,如阵雨、雷雨、暴雨等;带状云图表明有冷空气来
Satellite imagery is the satellite that uses the equipment such as scanning radiometer to detect the surface cloud and surface features, and the information is received by the ground. The image is restored by the display device, which is mainly divided into visible light cloud image and infrared cloud image. The cloud we see on TV is a processed visible satellite image. On the TV picture, the land is generally green, the sea is blue, the clouds are white and dark gray. The color of the clouds reflects the sky cloud level, cloud thickness, cloud ice crystals and water droplets in the cloud content. High clouds (> 6000 meters) are mostly composed of ice crystals, with strong reflection, thin and sparse clouds, mostly white clouds; medium clouds (2000 meters to 6000 meters) are mostly mixtures of water droplets and ice crystals with dense clouds and mostly cloudy clouds Light gray; low clouds (<2000 meters) mostly composed of water droplets, thick and thick clouds, and sometimes ups and downs of the clumpy, dark gray clouds. In this way, according to the color of the clouds, the clouds can be distinguished from the clouds. If the clouds in low clouds, it will be cloudy, there may be precipitation. The shape of the cloud reflects a certain weather system. The swirling clouds indicate that the upper air is controlled by a low-pressure vortex system, and most of them are unstable precipitation such as showers, thunderstorms, heavy rains and the like; banded clouds indicate that there is cold air