Radar target and Radar echo

Radar target noun - A radar echo displayed so as to show the position of a reflecting surface.

Radar echo and radar target are semantically related. In some cases you can use "Radar echo" instead a noun phrase "Radar target".

Radar echo noun - An electronic signal that has been reflected back to the radar antenna; contains information about the location and distance of the reflecting object.

Radar target and radar echo are semantically related. Sometimes you can replace phrase "Radar target" with "Radar echo", this phrases are similar.