I am having the exact same problem. All my distances are way short. The good news is outdoors, at the driving range they are very accurate. I am using an Android system is there a fix? Any suggestions?
No one has yet been able to compare the indoor club head / ball speed with the on range speeds. I have only seen one in one of the threads, and club head speed / ball speed indoor was way lower than range. Which of course leads to shorter distances.
If there is a difference, the next question is of course if the r10 reads these values wrong indoor, or the swing speed just is slower indoor.
There can be many reasons for swinging slower indoor, some I can think of is ground force being reduced, fear of hitting the ceiling/walls, fear of loosing the club, fear of the ball bouncing back and probably other reasons.
So come on: present som numbers of club and ballspeed indoor compared with range. If they are the same and distances are shorter indoor, I'm convinced.
Club head speeds identical for me in or out. I even tried moving it from my basement to garage where I have all the room on the world with 9.5ft ceilings. It doesn't like mesh netting. Moved it to a public sim that used Uneekor eyeXO it worked perfectly. That used a screen and 15ft cielings.
If there's any other test I'll do it. Three nets later, two diff mats, two diff spots and I'm getting short ass readings constantly on Awesome golf, Garmin range and HTH. E6 connect with elevation at 4500 fixes it.
R10 actually made my game worse this spring and I had to unlearn all the short distances. Literally 100s of posts on this. Not everyone indoors is swinging less. Tested swinging WAY harder esp driver than I would on a real course. The lower the loft of the club. The shorter the distances get.
Luckily I know my distances and swing speeds. With the driver, my average carry is approximately 270. The Garmin approach R10 is giving me 175 yds. on average. You get the same kind of averages through the bag. The guy doubting the accuracy of our statements probably works for Garmin.
Club head speed doesen't really matter for distances.
The R10 also measures ball speed, and this is being used for distance calculation. This I'm pretty sure of since my R10 occationally gives me way to high club head speed, but ball speed is ok and distance is correct (smash factor down to almost 1 on the driver).
If Your club head speed is consistant indoor and outdoor, can You check if there are any discrepancies in the ball speed?
And if they are approx the same, but distances still different, then it must be back spin. Higher back spin will result in shorter distance.
Back spin is calculated, not measured, and if for some reason the back spin is way too high in indoor environment, then Garmin needs to fix this.
And no, I'm not working for Garmin at all.
I just have a feeling that the R10 is reading correct data, but the app may have issues.
