What role does radar play in weather observation?

Radar is the best tracker, which can track the wind during a thunderstorm. You can also draw a salty map of the rain and snow area. The first radar was developed and improved during World War II, and later became a civilian radar. Radar sends out electromagnetic signals, usually microwaves, which will turn back when encountering raindrops, hail and snowflakes; By measuring the time required for the signal to return to the radar and how many signals return, scientists can calculate how far the precipitation area is and how much precipitation there is.

Doppler radar was widely used in 1990s. It uses the frequency of the return signal to estimate the moving speed of precipitation targets-to estimate the speed at which the wind blows them.