How to distinguish SRA radar
1. Regarding the radar echo map, our public friends can check the weather and radar echo on the official account of "Weather" WeChat.
2. Meteorological departments often use SMS, Weibo, WeChat official account and other means to release forecast and early warning information to everyone. When it comes to the acquisition of this information, we have to mention Doppler radar, which, like human eyes, is specially used to monitor small-scale severe convective weather systems. With the help of radar echo map, we can know the intensity, general position and moving direction of this rainfall system. The area corresponding to the blue echo indicates that the local area is covered by precipitation clouds, but it has not rained yet; The area covered by green echo represents the local immersion in the continuous drizzle; There is moderate to heavy rain in the area covered by yellow to red echo; The area covered by purple echo has the highest precipitation intensity, and this area "falls" in heavy rain, which may be accompanied by severe weather such as lightning, strong wind and even hail.
3. Synthetic Aperture Radar (SAR) is a microwave remote sensing imaging radar. Compared with optical and infrared radar, its imaging is less limited by weather and other conditions, and it has the characteristics of all-weather, all-time, multi-angle and high resolution. In the late19th century, the range resolution of radar can reach within150m, but when the distance between radar and target exceeds100km, its azimuth resolution is very poor, which is more than1500m. Therefore, improving the range and azimuth resolution has become the key research direction in the radar field in the mid-20th century. At this time, SAR came into being. The reason why SAR can form a large aperture radar is to use the high-speed movement of the carrier. Therefore, the lateral resolution of SAR is high. SAR can photograph the earth's surface and form a radar image similar to a map, which is widely used in cartography, resource exploration, marine application and other national economic fields.