evangilder
"Shooter"
Keep in mind that the Dopler effect is essentially the principle behind radar. It is how the wave is reflected and changed when it returns to the antenna. To give a great example of Doppler shift, stand next to a train. As the train approaches, the sound appears to go higher. This is caused by the waves compressing as they travel toward you. After it passes, the picth changes again because the waves are stretching as they travel away from you. They aren't really stretching and compressing, they just get that way from the movement of the object.
So how the wave is returned to the radar indicates the direction of the aircraft in the radar range.
So how the wave is returned to the radar indicates the direction of the aircraft in the radar range.