Radar relies on the concepts of Doppler shift and echo location. Each is a common phenomenon that you experience each day but are probably unaware of. Doppler shift occurs when sound is reflected, generated, or projected from a moving object. A good example of Doppler shift would be if a car blaring it’s horn went by you at a high speed, the sound would get louder and have a high tone as the vehicle got closer and fainter with a lower tone as the vehicle passed and got further away. It is possible to combine Doppler shift and echo to get a precise calculation on how fast that car is moving. If you were able to send out loud sounds toward the car, some of the waves would bounce off the moving car and echo back towards you. However, these sound waves will be compressed, causing them to have a higher pitc

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