[unwind]

I'm sure this is thrilling to folks interested in tracking their sports performance; it does seem like a somewhat new and useful product for that field. It's not my area of expertise at all, I just looked at it due to general gadget/sensors/tracking interests triggering.

I found the campaign page lacking in technical detail, it repeatedly states that it's "accurate", but never becomes more specific than saying "inch-accurate". What does that mean? That the position of the device is tracked with an accuracy of +/- 1 inch? Globally? Without extra hardware "in the field" (such as that used by the tractors discussed here just a few days ago)? The title here uses the word "centimetric", but that's not repeated on the campaign page.

Also, $200 feels expensive to me, but again I'm not in the market, perhaps it's magically cheap if you simply could not do this before, but now you can.

[asmithmd1]

It sounds like they are tracking acceleration and integrating to get speed - then integrating again to get location. If that is what they are doing then position will drift over time. If the battery life only lasts 12 hours then maybe position only drifts an inch or so by the time you put it back in the charger and re-zero the location

[pedrosorio]

Exactly, it would be interesting to get a bit more insight into the technology given the extraordinary claims of accuracy.

[cAldar]

Good point. We're going to be adding a paper about the technology in the next couple of days.