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I’m DC RAINMAKER…
I swim, bike and run. Then, I come here and write about my adventures. It’s as simple as that. Most of the time. If you’re new around these parts, here’s the long version of my story.
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Smart Trainers Buyers Guide: Looking at a smart trainer this winter? I cover all the units to buy (and avoid) for indoor training. The good, the bad, and the ugly.
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Here’s my most recent GPS watch guide here, and cycling GPS computers here. Plus there are smart trainers here, all in these guides cover almost every category of sports gadgets out there. Looking for the equipment I use day-to-day? I also just put together my complete ‘Gear I Use’ equipment list, from swim to bike to run and everything in between (plus a few extra things). And to compliment that, here’s The Girl’s (my wife’s) list. Enjoy, and thanks for stopping by!
Have some fun in the travel section.
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My Photography Gear: The Cameras/Drones/Action Cams I Use Daily
The most common question I receive outside of the “what’s the best GPS watch for me” variant, are photography-esq based. So in efforts to combat the amount of emails I need to sort through on a daily basis, I’ve complied this “My Photography Gear” post for your curious minds (including drones & action cams!)! It’s a nice break from the day-to-day sports-tech talk, and I hope you get something out of it!
The Swim/Bike/Run Gear I Use List
Many readers stumble into my website in search of information on the latest and greatest sports tech products. But at the end of the day, you might just be wondering “What does Ray use when not testing new products?”. So here is the most up to date list of products I like and fit the bill for me and my training needs best! DC Rainmaker 2024 swim, bike, run, and general gear list. But wait, are you a female and feel like these things might not apply to you? If that’s the case (but certainly not saying my choices aren’t good for women), and you just want to see a different gear junkies “picks”, check out The Girl’s Gear Guide too.
I guess this is the same Sports Tracker that came bundled with the N79 Active.
That was my first step into sports tracking and my first tracks on Strava are from there.
Funny to hear that they are still around.
>9-axis motion sensor/gyro/magnetometer.
Maybe I’m missing something, but I thought you only needed 6 axes (XYZ plus the corresponding rotational axes) to totally specify location and orientation?
Or is it oversampling multiple 3 axis sensors to drive the full output?
I assumed 9 was 3 for acceleration, 3 for gyro, and 3 for magnetic field.
9-axis is a common misnomer. You’re correct that there are only 6 physical axes in 3D space (X,Y,Z and their rotations). But as Heinrich says, it’s measuring 9 things (so 9 degrees of measurement would be accurate. Maybe 9 axes of measurement, but I still don’t like it).
The accelerometer measures acceleration in X, Y and Z. When static, it also knows which way is down (because of the acceleration from Earth’s gravity), which can help work out rotation angles.
The gyroscope measures the rate at which the object is spinning around X, Y and Z, so it’s good at quickly sensing changes in orientation, but those changes needed to be tracked (integrated) to give actual orientation (i.e. if you’re pointing down and rotate at 90 degrees per second for 1 second, you’re now horizontal (depending on rotation axis)).
The magnetometer measures the Earth’s magnetic field, which gives you your heading (i.e. where’s North). Being 3-axis, it can also give you some indication of orientation, like the accelerometer does.
By combining all 3 (along with some knowledge of their physical relationships, and a bunch of maths), you get accurate acceleration, rotation and orientation. That’s 9 measurements, but still only 6 axes. (you could also integrate acceleration to get velocity and even position, but your results will be useless rubbish. You could take the derivative of rotation rate to get rotational acceleration, and it’d be better, but perhaps not terribly useful)
Nice. Thanks for this Ray.
Wasn’t Jussi Kaasinen an employee at Nokia when he developed Sports Tracker as part of the Nokia Beta Labs program? And didn’t a large chunk of Nokia’s consumer division end up working for Suunto after their Microsoft-inspired demise?
And then technically it was Amer that purchased Sports Tracker – not Suunto – to create “Amer Sports Digital Services” but the two companies were clearly playing together given Suunto App appeared to start life as a re-skinned Sports Tracker app and it’s back-end (and web app) are very clearly still just Sports Tracker.
There were a few Nokia folks that ended up at Suunto, but Nokia was a gigantic company – so practically speaking Nokia folks ended up working at basically every company in Finland. ;)
True though, technically Amer was the one that purchased Sports Tracker, but practically speaking Suunto led everything there. And yes, as alluded to in the post, the ‘new’ Suunto platform that replaced Movescount is merely just Sports Tracker (obviously, with some heavy updates, but still just Sports Tracker).