|Topic Review (Newest First)|
|04-06-2013 11:55 AM|
[QUOTE=poutanen;896954]I tracked myself with apps for a couple years, various apps and various phones. My top speeds (after correction) were consistently anywhere from 100-130 kph each day.
Ah, shitty, I read that & was thinkin'....
That was last year?
Fuck, we must be pushin' @ least 150 this year?
Not bad almost 95mph
I've never used one of those things, but I'm really curious.
Done 100kmh on my home made longboard, didn't seem near as fast as I can go on my snowboard.
|04-05-2013 08:20 PM|
|redlude97||minute elevation changes on the mountain are very inaccurate. Simple geometry tells you that those inaccuracies get amplified when calculating speed. Hence, completely inaccurate readings even with the best GPS signal.|
|04-05-2013 05:37 PM|
|04-05-2013 05:32 PM|
Originally Posted by The Deacon View Post
Accuracy probably depends on the terrain that you are riding.
|04-05-2013 05:05 PM|
|Deacon||I guess I mostly just use it to compare one day to the next, not one rider to the next. And for that, it works. Plus it scares my wife, so that's fun!|
|04-05-2013 04:55 PM|
Me, a few buddies, and the gf all have have the same Ski Tracks app. I have an iPhone 5. One of my friends has an android phone and the gf has an iPhone 4. Whenever we all start our apps at the same time and ride together all day and then check our stats at the end of the day we all get different results.
The gf's iPhone 4 is the worst offender. It consistently reads faster and steeper than anyone else's stats. There are days when we all cruise at the same speed all day and ride the same runs then when we check the stats, the gf's phone usually records speeds 5-15 mph faster than all the other phones. One day she had a maximum slope angle of 54 degrees when I'm sure we didn't exceed 30.
I take these ski tracker app stats with a grain of salt. Whenever I achieve a new top speed I'm always skeptical.
|04-05-2013 04:25 PM|
From what I've read, the intervals can be anywhere from 1/2 a second to 5 seconds or so.
For what it's worth, the apps I used recorded raw GPS data from the phone at intervals that I told it to, and I uploaded that data to Garmins website, so I'm comparing apples to apples as far as how the data is interpreted after it's recorded.
|04-05-2013 04:13 PM|
Poutanen, just curious which GPS watch you are using and do you know how it is logging coordinates? 1 sec. or 1/2 sec. intervals. Or do dedicated GPS receivers handle things entirely different than phone app GPS does?
Looking to school my ignorance here,..
|04-05-2013 03:57 PM|
I tracked myself with apps for a couple years, various apps and various phones. My top speeds (after correction) were consistently anywhere from 100-130 kph each day.
I bought a Garmin GPS watch this year (after losing a phone on the hill) and was expecting similar results. My boarding hasn't changed, in fact I'm likely going FASTER as I'm used to the mountains more this year, but the top speeds have gone down to the 70 kph range at Fernie and Lake Louise (more off piste), and the mid-80 kph range at Nakiska (groomer bombing/hard carving).
The other thing is, my max speeds used to fluctuate by 20 kph a day at the same hills. Now it's very consistent. All my max speeds since changing to the watch (about 30 on hill days ago) have been within approx 15 kph over ALL the hills.
Next time I'm out, I'll take a smartphone with the app and run the GPS watch at the same time.
Overall distance will be reasonably close, although the apps don't pick up carving. Max speed for the day is just so random that looking at an app and saying things like "my max speed is higher than yours because _____" just doesn't make sense.
The apps are fun, it's a great way to push yourself for longer distance and vert each day, just ignore the max speed readout. It shouldn't even be there...
|04-05-2013 03:43 PM|
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