Displacement of these peaks away from their known frequencies is called "echo Doppler shift" and permits to obtain the radial velocity of a surface current, that is the scatter velocity along the line between the hit surface and the radar.
Displacement of these peaks away from their known frequencies is called "echo Doppler shift" and permits to obtain the radial velocity of a surface current. A surface current is the scatter velocity along the line between the hit surface. A surface current is the scatter velocity along the line between the radar.