When a radar gun says the pitch is 90 miles per hour at what point in the ball's travel to home plate is the radar gun measuring the velocity?

== The measurement is made at the point where the ball is when the trigger is squeezed and the contacts close to activate the unit. The gun responds in a "split second" by sending out a pulse, catching the return, and then comparing the two to discover the difference (the Doppler shift). It is so fast that the ball doesn't travel very far in the time it takes the unit to respond and resolve the speed. == It depends upon the radar gun. Some radar guns lock the speed at the instant the operator depresses the trigger. Other radar guns (such as the Bushnell® VelocityTM radar gun) include a feature that locks in the fastest speed that occurred during the entire time the trigger was depressed.