What is the function of radar weather map in war?

During World War II, radar was first used in the military field. They tried to find the enemy plane by the reflection of the radio beam, but their plan was affected by the chaotic reflection caused by the rain. Scientists are very excited to see this chaotic situation. Because they found an instrument that can detect the substances hidden behind the clouds. A few years later, radar became the standard tool for studying storms. Scientists even used radar to discover the relationship between the air circulation above the clouds and the rotation of tornadoes on the ground.

Traditional radar has its limitations. When the storm moves, the reflected wave (microwave echo) of the radar observer will also move, but most of the movement inside the storm will disappear because of the huge white water droplets. But in the 1950s, researchers developed a new type of radar called Doppler radar. It can detect the movement inside the clouds. Now, Doppler radar plays an important role in improving weather forecasting ability, and can predict the development of short-term strong storms.

Radar releases microwaves, which are reflected by substances in the air. When Doppler radar reflects microwave, we can clearly observe the slight change of wave frequency. If a drop of rain hits the radar, the frequency of reflected waves will increase; On the contrary, the farther the water drops are from the radar, the lower the wave frequency will be. This law of wave frequency was discovered by Australian physicist Doppler in 1842. He explained why the whistle sounded so loud when the train approached, and the sound faded when the train left. At first, Doppler radar was very heavy. Computers can't undertake data operations. In the 1970s, tornado researchers used Doppler radar to detect several storms. In the early 1980s, scientists used the Doppler radar group to show the three-dimensional structure of storms and explain the existence of micro-explosions that threatened airplanes.