20

Several types of tracking technology exist, and the type used depends upon the the circumstances of the competition. In training, some teams are now tracking with systems like RedFIR, a German technology comprised of tiny (15 gram) radio transmitters that can be placed in uniforms, footwear or balls, and a network of receivers set up around the field. The ...


17

You are right that the French Open is the only Grand Slam tournament without Hawkeye, The reason is that Clay, unlike grass and hardcourts, leaves a mark that players and umpires can check and verify if the ball was in or out. You can argue that some mistakes can be made but that's quite rare, A hawkeye system is very expensive and the cost/benefit ratio ...


15

The UEFA Champion's League uses goal-line technology. This is an automated system which detects the moment the ball has crossed the goal-line under the crossbar. It sends a signal to the referee via a wrist-mounted alarm unit to show a goal has been scored. This reduces the reliance on precise visual judgements from bad angles. The referee indicated that ...


10

The watch is the part of Goal Line Technology system, Under IFAB LAW 1 - THE FIELD OF PLAY, GOAL LINE TECHNOLOGY (GLT) The indication of whether a goal has been scored must be immediate and automatically confirmed within one second by the GLT system only to the match officials (via the referee’s watch, by vibration and visual signal). (my ...


7

A lot of professional teams these days use ProZone. This is used for Performance Analysis (which 'distance covered' would probably be included), Physiological Monitoring, Player Recruitment and Research/Consultancy. See here for more details on Player Tracking. Players who wear Adidas boots can also take advantage of the miCoach Speed Cell which covers ...


5

Essentially it hasn't been introduced by UEFA because the top brass don't support it because of the financial cost. Platini says: "I prefer to put more money into youth football and infrastructure than spend it on technology when there's a goal in a blue moon that hasn't been seen by a referee." "It would cost around 54 million euros (£46m) over five ...


5

Note that I've changed this answer several times, to keep up with current status. TLDR: Use Smashrun, then Tapiriik In the previous months/years Nike has been changing the way it provides data; including who it provides it to. I'd been using the exporter by Rhys McCaig for quite some time, but he has since discontinued his tool. I've also tried Tapiriik, ...


5

There are 16 cameras around the field that can track each player's distance traveled within 3% accuracy. Source - WSJ


4

I strongly suspect that the manufacturers of Hawkeye and similar ball tracking systems would actually prefer not to have a hard 'ground truth' to compare to being beamed live to millions of viewers. These systems are not as accurate as the TV graphics imply and there use as part of the umpiring process is not all to do with accuracy. It is as much about ...


4

The Android app SyncMyTracks can import and export from and to Nike+, Strava, RunKeeper, Endomondo, Garmin Connect and other services. I've been using it for a few months, and it works great!


4

I looked for recorded instances of the same finishing time by more than 3 runners, and couldn't find any. As was mentioned in the comments, the race you referenced in your question was reported to 0.01 seconds. A quick online search showed that they eventually ruled based on the photo finish camera (those results can be seen in the photo you included in the ...


3

Radar gun is used to calculate the bowling speed in cricket.A simple example showing the use on http://www.bigbro.in/blog/how-is-the-bowling-speed-and-lengthdistance-of-the-sixes-hit-in-cricket-measured/ How it works? Radar gun is the current or present technology to calculate the speed of bowl. Radar gun has both radio transmitter and the receiver. This ...


3

I haven't found any technical tool under "indepedent training management" rather mechanical innovations. Firstly, soft ball slows down the features of the ball such as spinning so easier to analyse. Secondly, different field materials help you to understand the behaviour of ball such as spin. Thirdly, a hit wall makes it far faster to trial-and-error ...


3

As there is no official wording from Sky Sports on technology behind Rev Counter there were two possible theories, one would be high-speed camera coupled to a computer running an image recognition/analysis program as mentioned in the Physics StackExchange Question. Which would be challenging in that given time frame.Other one is 3D Doppler Tracking that is ...


3

First, Hawk-Eye technology is not available for every court that professional matches are played on. So, in those cases, players can't challenge a call because no Hawk-Eye is available. The chair umpire will inform players before they begin to warm-up if Hawk-Eye will be in use for their match or not. Second, Hawk-Eye tracks the trajectory of each shot ...


3

I'm not aware of any iPhone specific service, but you could give the website tennisopolis a try. http://tennisopolis.com/


3

The (free) online app called Tapiriik provides a great way to sync between many applications. Including endomondo, strave, runkeeper, dropbox, garmin, ride with gps, motivato, and many others.


3

Firstly, compression means less work needed by stabilisers to maintain the position. An example is powerlifting. Secondly, it improves the post-recovery particularly in athletes who have very low recovery HR. Thirdly, they are timeless. Different compression clothes originates from nursing and old people care where for example compression stockings are used ...


3

Clay courts leave a visible mark which shows where the ball lands. This is the reason why the staff at Roland Garros clear the court often during a match so there wont be overlap of marks(or mistake of the actual mark), which can cause confusion. If a ball is questionable, then the referee will come down and check the mark on the court and make his ...


3

I haven't heard much of anything about the balls being faster - but there are definitely other factors that have contributed to serve and volley (S&V) becoming a much less common playing style in tennis these days. The balls used across ATP tournaments are generally the same (Head ATP is the official ball brand of the mens tour currently), with the ...


3

Couldn't they switch on more lights? What is the bad light rule for limited overs cricket? Yes they CAN. But only if it is available for that particular match. Remember, the issue is for day matches only. Umpire's role on bad lights. From Standard ODI match playing conditions PDF: (emphasis mine) 3.7 Use of artificial lights If in the opinion of the ...


3

I found this - https://www.fitnesssyncer.com/ It worked great, did all my runs separately including all the data and routes!


3

Your impression of line calling is incorrect. The ball must physically touch the line to be counted in. An "overhang" as seen from directly above the ball (used in other ball sports such as football or hockey) is not enough. This is easiest to see with clay court games. If the ball clips or skids on the line, it leaves a dusty mark showing this. For close ...


2

Balls can skid much longer distances on clay. On hard courts only the ball measurably changes (deforms) on impact. On clay both the ball and the court are changing simultaneously as a layer of dirt is shifted around. These factors make Hawk-Eye's job more challenging on clay and it would be logical to conclude that Hawk-Eye's margin of error increases on ...


2

Ball Spin RPM - Starting during the TV coverage by Sky sports for the 2013 Ashes series, they were able to show a RPM (revolutions per minute) counter, showing how fast the ball was spinning after release. It is not clear how this is measured, though it would need a high speed camera focussed on the ball, possibly using the same images that are captured for ...


2

Traditionally, the speed of the tennis ball is measured with radars based on Doppler effect where the difference in pulses reveal the speed. This device costs about 100EUR and it is bulky to carry around besides a camera. So trying to get the speed in other ways: Programmatically in Mathematica? Thread here. Which features required in a camera? ...


2

Stump cameras were first used in 1992 cricket world cup, a tournament of several innovations in modern cricket like colored player clothing, white cricket balls, black sight screens etc. Source.


2

They use video processing software that either track the players by jersey color or other features such as their jersey number. They can also place markers on the players before the game and have the software track them from the moment they walk onto the pitch. Finally they can also have a cell on their person that tracks each players relative postion on the ...


2

If we say the bowler is literally throwing the ball for example like this: Source: ESPNCrickinfo then the umpire shall declare it as a No-ball imminently. If we say the bowler bowls throw balls in bowling action. That means he is running and performing the same action as bowling like this: Source: Wikipedia but not bowling properly (i.e. still ...


2

This BBC article confirms that Hawk-eye can track any types of bounce, spin, swing and seam with 99.99% accuracy. So, it's basically a hawk-eye that is used to calculate cricket ball's swing instantly.


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