Golf Launch Monitors Explained: Radar vs Camera, Key Numbers and Space Needs
Note: Some future links on this site may be affiliate links. We never claim hands-on testing; guides are researched from the public sources listed in each article.
How we wrote this: A guidance article based on manufacturers' public specifications and support documents (sources below). We have not personally tested any launch monitor. Range Rita is an AI-generated character. Her impossible shots wouldn't register on any real device. This isn't financial advice about what to spend.
A launch monitor measures what happens at impact and right after it, then estimates where the ball goes. Personal units have made this tech common at driving ranges and in garages. Here's how to make sense of the options.
Two main technologies
Radar (Doppler) units
Radar launch monitors track the ball (and often the club) by bouncing microwave signals off it and measuring the Doppler shift. They usually sit behind the golfer, looking down the target line.
Radar tracks well outdoors where it can follow a long stretch of flight. Indoors it needs enough room behind the ball and enough ball flight in front. As one reference point, TrackMan's support guide for its TM4 simulator setup lists the unit position as 6 ft minimum, 7 ft optimal and 9 ft 6 in maximum behind the hitting area. TrackMan notes that TM4 combines dual radar with optical tracking indoors (TrackMan Help Center). Personal radar units have their own requirements, so always check the specific model's manual.
Camera (photometric) units
Camera-based units take high-speed images of the ball (and sometimes the club) right after impact and calculate launch and spin from them. They typically sit beside the ball or overhead, not behind it, which makes them popular for tight indoor spaces. Many need specific lighting, and some need marked balls for full spin data. Check the maker's setup guide.
(Look for: radar personal launch monitor) (Look for: camera-based golf launch monitor)
The numbers that matter
TrackMan's public guide defines the standard launch monitor terms (TrackMan, Ultimate Guide). The essentials:
| Metric | What it tells you |
|---|---|
| Club speed | How fast the clubhead moves just before impact |
| Ball speed | How fast the ball leaves the face. TrackMan notes each 1 mph can mean up to about 2 yards with a driver (TrackMan) |
| Smash factor | Ball speed ÷ club speed. About 1.50 is ideal with a driver (TrackMan) |
| Launch angle | Starting angle relative to the ground |
| Spin rate | Backspin in rpm. Drives height and carry |
| Attack angle | Whether the club is moving up or down at impact |
| Club path / face angle | The direction the club travels and where the face points, which shape curve |
| Carry / total distance | Estimates, calculated from the measured launch data |
Measured vs calculated: Some numbers are measured directly, and others are calculated from models. Budget units often measure fewer parameters and estimate the rest (spin is a common example). Spec sheets usually state which is which. Look for that.
Choosing by use case
"I want my numbers at the range"
- Portable, battery-powered, phone-app based
- Radar units are common here
- Check: outdoor accuracy claims, battery life, app subscription requirements
"I want a garage or basement simulator"
- Space is the main constraint (see below)
- Camera units are often easier indoors
- Check: simulator software compatibility, lighting needs, minimum room depth
"I just want swing speed"
- A simple swing speed radar may be enough. Cheapest option. (Look for: golf swing speed radar)
How much space you need indoors
Room size is often the real deciding factor. TrackMan's TM4 simulator guide gives one bay's minimums (TrackMan Help Center):
- Ceiling: 9 ft minimum, 11 ft optimal
- Hitting area to impact screen: 10 ft minimum, 12 ft optimal
- Ball to unit (behind): 6 ft minimum, 7 ft optimal
- Behind the screen: 1 ft
Add that up for a behind-the-ball radar setup and you need about 17 ft of depth at minimum, and more for comfort. Camera units that sit beside the ball remove the behind-the-golfer requirement, so they can fit shorter rooms. Ceiling height for a full swing still matters.
Our home golf practice setup guide covers nets, mats and screens.
Features and costs to check before buying
- Subscriptions. Some units lock features or simulator courses behind a monthly or annual plan. Read the fine print.
- Measured parameters. Which of the metrics above are measured vs estimated?
- Indoor vs outdoor accuracy. Some units perform differently in each.
- Ball requirements. Marked or metallic-dot balls for spin?
- Device compatibility. Phone, tablet or PC, and which simulator software.
- Power. Battery life, or wall power only.
- Mounting. Floor, tripod or ceiling mount.
Accessories you'll likely need
- Hitting mat (indoor): (Look for: golf hitting mat)
- Net or impact screen: (Look for: golf impact screen)
- Tripod or mount: (Look for: launch monitor tripod mount)
- Marked balls if your unit requires them: (Look for: launch monitor golf balls)
Getting useful data
- Hit in sets of 10 and look at averages, not your best shot.
- Change one thing at a time (tee height, ball position, club).
- Track over weeks. Look at smash factor and strike consistency before chasing raw speed.
Summary
- Radar: behind the golfer, great outdoors, needs room depth indoors.
- Camera: beside or above the ball, compact indoors, may need lighting or marked balls.
- Key numbers: ball speed, smash factor, launch, spin and attack angle.
- Check: space, subscriptions, measured vs estimated data.
Range Rita's impossible shots are AI-generated. A launch monitor can't measure fiction, but it can show you exactly where your next 10 yards are hiding.
Sources
- TrackMan Help Center, "TM4 Simulator Room Dimension Requirements" (updated May 22, 2026): https://support.trackmangolf.com/hc/en-us/articles/5089892716699-TM4-Simulator-Room-Dimension-Requirements
- TrackMan, "The Ultimate Guide to Understanding Trackman": https://www.trackman.com/blog/the-ultimate-guide-to-understanding-trackman
- TrackMan, "What is Smash Factor in Golf?": https://www.trackman.com/blog/golf/smash-factor