Now you may ask- what is a doppler weather radar?
It is a tool that identifies tornadoes from far away and was created in 1842 by Christian Doppler thus the name given to his invention.
Initially, in the 1940’s it was used in military activities and required large analog filters to obtain data which was the main hindrance for the general activities of the military, for example using it only allowed military planes to conduct operations at night. In the 1970’s Doppler radar no longer needed large analog filters which resulted in it being more open and useful to other fields. Modern doppler systems are good with ground surveillance and are used by police to check speeding vehicles to weather pattern detection.
Mainly focusing on weather pattern detection especially tornadoes, a more specialized form of doppler radars called pulse-doppler radars are used here and they work by bouncing back radio waves in the air back to the radar large doppler radars, can even pick up waves from raindrops and hailstones to bugs and dust. After these frequency waves are obtained by the doppler radar it converts it into data in form of location and intensity of the weather pattern. This then shows the meteorologist the forecast in form of the speed and direction of the wind and rain.
Research at the severe storm research center of Georgia tech research institute has created a warning decision support system that uses Advance image processing combined with artificial intelligence and neural network to improve the warning and lead time of severe weather catastrophes, thus resulting in a 50% increase in lead time.
References:
- https://www.forbes.com/sites/dennismersereau/2022/03/24/this-comparison-shows-how-much-a-lifesaving-tool-has-advanced-in-25-years/?sh=5a13299a44bc
- http://www.dopplerradio.net/doppler-radar-invented/
- https://www.papertrell.com/apps/preview/The-Handy-Physics-Answer-Book/Handy%20Answer%20book/How-do-the-police-use-the-Doppler-Effect-in-radar-guns/001137019/content/SC/52cafffa82fad14abfa5c2e0_default.html#:~:text=The%20police%20use%20the%20Doppler%20Effect%20when%20checking%20for%20speeding,gun%20at%20a%20different%20frequency.
Tornado’s are devastating especially in USA, so I’m glad there is a technology that can mitigate the losses. Though it would be annoying to get a ticket because you got spotted on a radar speeding.