I've been eyeballing a volleyball match right now (apparently, it's world championships :), and have noticed that they show "spike speed" for spike replays. How is that speed measured? Is the ball stuffed with sensors or is there an array of hi-speed cameras to measure this? How much instrumentation is there for a high-profile match like this?
The main judge has three displays at his disposals, they look like three completely different things. At at least two times teams have contested a ruling, and a rudimentary 3D animation was shown on stream. It looked bit low-res, and definitely not like something the studio responsible for the transmission would do - so it must have originated from some kind of match-local instrumentation.