The speed gun is a device that measures the speed of the ball from one end of the pitch to the other - and is thus used to calculate the speed at which a bowler delivers the ball. It has been used regularly in cricket since 1999.
The speed gun is mounted on a pole and positioned next to the sight-screen. The device relays a beam from a radar head, which detects movement across the entire length of the pitch. A small pipe is used to aim the beam accurately. The whole process runs on microwave technology.
The wind speed has no bearing on the speed gun, since the microwaves are a very strong force that can penetrate all weather conditions.
Yes. Tennis was the first sport to adopt the speed gun. The parameters of the software used were changed to have it apply to cricket.
With thanks to Alex Loccisano Broadcasting Service, a technology partner with Ten Sports