Significance of Doppler weather radar

Doppler radar is the most advanced radar system in the world at present, and it is called "super clairvoyance". Compared with traditional weather radar, Doppler radar can monitor the formation and change of convective clouds at an altitude of 8- 12km perpendicular to the ground and judge the moving speed of clouds. There are as many as 72 kinds of product information, and the accuracy of weather forecast will be greatly improved. From 199 1 to 1997, the165 NERDA troops deployed by the United States in China and overseas are called the models of weather radar systems, which are the most advanced and accurate weather radar systems in the world at present. Doppler signal processing technology and the ability to automatically generate severe weather warnings are unparalleled. NEXRAD can automatically form and display colorful weather products, which greatly improves the ability of monitoring and forecasting major disastrous weather such as supercell, lake-effect snow, layered snow, thunderstorm, precipitation, windshear, downburst, tornado, front, turbulence and hail. The reconnaissance rate of strong thunderstorm is 96%, the detection rate of tornado is 83%, and the average warning time of tornado warning is 18 minutes. Before the NEXRDA network was built, the average values of the above parameters in the United States were 60%, 40% and 2 minutes respectively. It can be predicted that CINRDA will fundamentally enhance the ability to detect severe thunderstorms, detect the possibility of atmospheric turbulence and catastrophic floods in clear skies earlier, and provide extremely valuable information for water resources management decisions. The construction of a new generation weather radar system is a meteorological modernization project in China in the late 20th century and early 20th century. It is planned to build 156 S-band and C-band radars in China. After the system is completed, the meteorological modernization level of China will reach a new level.