DOPPLER RADAR
The biggest advance in post-war radar technology was Doppler radar. With the need to defend against bombers gone, the new motivation to refine the technology was using it to track the weather. While ordinary radar can figure out range and location, Doppler can also tell us information about an object’s speed. It works on the principle of the Doppler effect, the idea that waves produced by an object will be squeezed closer together if it’s moving towards you, or spread out if moving away. This is invaluable for tracking weather systems. They can gather a huge amount of information, so modern Doppler radar depends on increasing processing power. Doppler radar is also what you would find in a police speed gun.