Topgolf uses radar to watch your ball from the moment it leaves the club

When you hit a ball at Topgolf, a radar system called Doppler radar tracks it through the air. The radar sits in the bay ceiling and sends out radio waves. When those waves bounce off your moving ball, the radar reads how the waves come back and calculates the ball's speed, direction, and spin. This all happens in milliseconds — before your ball lands in the grass.

The radar measures what golfers call ball flight data: how fast the ball left the club, how high it went, how much it curved, and where it landed. Topgolf's computer then matches that data to a target on the screen in front of you. If you hit toward the 150-yard marker, the system figures out whether you landed short, long, or on target, and your score updates when ready.

This is the same type of radar that weather services use to track storms and that police use for speed guns. Topgolf licensed the technology from a company called TrackMan, which originally built it for professional golf tours to analyze tour players' swings. Topgolf adapted it for their bays so that casual players could see the same data.

Key Takeaways

  • Doppler radar in the bay ceiling bounces radio waves off your ball to measure its speed, direction, spin, and landing spot.
  • The radar reads ball flight data in milliseconds and sends it to the screen, which shows you whether you hit your target.
  • Topgolf uses TrackMan technology, the same system professional tours use to analyze tour players' shots.
  • The radar does not track you or collect personal data — it only measures the ball's movement during flight.
  • Weather radar and police speed guns work on the same Doppler principle, bouncing waves off a moving object to measure its speed.

Why Doppler radar works better than cameras for tracking a golf ball

A camera would seem like an obvious choice — point a lens at the ball and watch it fly. But cameras have a problem: a golf ball moves too fast and too far away. At Topgolf, balls travel 150 yards or more in a few seconds. A camera would need to be positioned perfectly and would struggle to follow the ball once it gets far from the bay. Radar does not care about distance or speed because it works by bouncing waves, not by looking.

Doppler radar also measures things a camera cannot see. A camera can tell you where the ball went, but radar tells you the ball's spin rate — how many times it rotates per minute — and its launch angle. These numbers matter because they explain why the ball behaves the way it does. A ball hit with high spin climbs higher and lands softer. A ball hit with low spin runs farther. Topgolf shows you these numbers so you can understand your swing, not just your score.

The radar is also fast enough to track multiple balls at once. If two bays are next to each other, each radar system stays focused on its own ball and does not get confused by the other one. This is why Topgolf can run dozens of bays simultaneously without the system breaking down.

What ball flight data Topgolf actually measures

The radar collects six main pieces of information about each shot. Carry distance is how far the ball travels through the air before it lands. Total distance includes the roll after landing. Launch angle is the angle at which the ball leaves the club face, measured in degrees. Ball speed is how fast the ball is moving when it leaves the club, measured in miles per hour.

Spin rate is how many times the ball rotates per minute. Spin axis describes which direction the ball is spinning — whether it is curving left, right, or staying straight. Topgolf displays some of these numbers on your screen after each shot, though the full dataset is more detailed than what appears on the display. The system uses all six measurements to place your ball on the virtual course and calculate your score.

Professional golfers and coaches use this same data to improve their game. A golfer might learn that their driver has too much spin, which causes the ball to climb too high and lose distance. They can then work on their swing to reduce spin and hit farther. Topgolf shows casual players the same numbers, though most people use them just to see how far they hit and whether they beat their friends.

How the radar connects your shot to the game on screen

After the radar measures your ball's flight, it sends the data to Topgolf's computer system in the bay. The computer has a map of the virtual golf course loaded into it — whether you are playing a real course like Pebble Beach or a fictional Topgolf course. The computer takes your ball flight data and calculates where that shot would land on that course.

If you hit a driver 250 yards straight, the computer places your ball 250 yards down the fairway. If you hit a 7-iron 160 yards with a 15-degree curve to the left, the computer accounts for that curve and places your ball 160 yards away but offset to the left. The screen updates in real time, so you see your ball appear on the virtual course almost when ready after you hit it.

The game keeps score based on where your ball lands relative to the target. Hit the green on a par 4 in two shots, and you get a birdie. Miss the green, and you get a bogey. The scoring works the same way as real golf, except the course is virtual and the radar does the measuring instead of you walking to find your ball.

Privacy and what data Topgolf collects about you

The radar itself does not collect personal information. It only measures the ball's movement. However, Topgolf's computer system does record other data when you play. If you create a Topgolf account, the system stores your name, email, and phone number. It also stores your game history — your scores, the courses you played, and your ball flight statistics.

Topgolf uses this data to let you track your improvement over time and to compete with friends online. You can see your average drive distance, your accuracy, and how your scores have changed month to month. This data stays in your account unless you delete it. Topgolf's privacy policy explains that they may also use this data for marketing purposes, such as sending you emails about new games or promotions.

If you play at Topgolf without an account, the radar still measures your shots, but the data is not saved after you leave. The bay computer displays your score on screen, but once your session ends, that data is not stored. You can choose to create an account later if you want to keep your scores.

How accurate is Topgolf's radar system

Topgolf's radar is accurate to within a few yards for distance and a few degrees for direction. This is precise enough for a game but not perfect. In real golf, a few yards matters — the difference between landing on the green and landing in the rough. On Topgolf's virtual course, a few yards of error is usually small enough that it does not change your score.

The radar can occasionally misread a shot if something blocks the signal. If you swing and the club head passes between the ball and the radar, the radar might lose track for a moment. If you hit a very low shot that skims the ground, the radar might pick up the ground instead of the ball. These situations are rare, and Topgolf's system is designed to ignore bad readings and wait for a clear signal.

Weather does not affect the radar the way it affects cameras. Rain, fog, and darkness do not interfere with radio waves. The radar works just as well on a cloudy day as a sunny one. This is one reason Topgolf chose radar over camera-based tracking — it works indoors and outdoors, in any lighting condition.

Frequently Asked Questions

Does Topgolf's radar track where I am standing or my personal information?

No. The radar only tracks the ball's flight. It does not measure your position, your swing, or anything about you as a person. If you do not create an account, Topgolf does not know who you are — the radar just measures the ball and displays your score on the bay screen.

Can Topgolf's radar measure my club head speed?

The radar measures ball speed, not club head speed. Ball speed is how fast the ball is moving after you hit it. Club head speed is how fast the club is moving before impact. These are related but different. Topgolf's system infers some information about your swing from the ball data, but it does not directly measure your club head.

Why does my distance sometimes seem wrong compared to real golf?

Topgolf's virtual courses are designed to feel realistic but are not exact replicas of real courses. The radar measures accurately, but the virtual course may have different elevation, wind, or other factors that change how distance translates to the game. Also, Topgolf balls are slightly different from real golf balls and may behave differently in flight.

Does the radar work if I hit a really bad shot?

Usually yes. The radar can track a ball even if you hit it sideways, backward, or into the ground. However, if you completely miss the ball or hit it so slowly that it barely moves, the radar might not register a shot. The system requires a minimum ball speed to count as a valid shot.

Can two people play in the same bay without the radar getting confused?

Yes. Each bay has its own radar, and the radar is focused on that bay only. If you and a friend take turns hitting in the same bay, the radar tracks each shot separately. The radar does not get confused by people moving around or by balls from other bays nearby.