computer software recording speed and accuracy

I am looking for help on a project to create software to record hits on a target using sensors and a radar gun so it would record on a computer screen the results of speed and location of hits . More specifically a person pitching a baseball to a target that has 9 sensors and a radar gun so i would know result of hit and velosity of the ball thrown.

What kind of sensors? Do you have the radar gun already? What part of the world are you in?