Bistatic Doppler shift

Okay kiddo, so do you know what doppler shift is? It's when the pitch of a sound changes when something is moving towards or away from you. For example, when an ambulance goes by with its siren on, the pitch of the siren changes as it gets closer and then farther away from you.

Now, let's talk about a bistatic doppler shift. This happens when a radar system bounces signals off of an object and then receives the signal back. The pitch of the returned signal will change if the object is moving towards or away from the radar system.

The "bi" in bistatic means there are two parts to the system: the radar transmitter and the radar receiver. In this case, they are not in the same location. This means that the object being detected may be moving in a different direction from the radar transmitter and receiver.

In other words, bistatic doppler shift is like playing catch with a friend who is standing far away. You throw a ball to your friend, and when they catch it, they throw it right back to you. When they catch the ball, you can tell if they are moving towards or away from you based on how fast they caught the ball. The same thing happens with the radar system and object being detected. By measuring the change in pitch of the returned signal, we can determine how fast the object is moving and in what direction.

So there you have it, kiddo! Bistatic doppler shift is like playing catch with a far-away friend, but with radar signals instead of a ball.