Suunto 9 baro very low elevation gain vs other brands
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Interesting one for me today…S9 more than doubled the ascent/descent on my route. Green graph is a lot more jagged than the typical results.
Pouring down rain today but it was constant the whole time.
Always carry a flaggon of whiskey for snakebite; and furthermore, always carry a small snake.
User of pretty much every watch since the Ambit 3 Peak. Now back in the family w SV :)
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@stromdiddily so light green is today, dark green is a track from the same route ran in the past? I see this sort of delay with FusedAlti, @Brad_Olwin has as well.
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@fazel green is today, yellow-ish is from three months ago on the same 7 mile route. The start looks ok tbh but the green is reporting over 1k feet of climbing and the yellow is correctly showing 500ish feet.
Edit - QS feature request, ability to assign colors to merged tracks
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@stromdiddily
the spike-ish graph looks like hydraulics did magic on the sensor… it’s a wild guess, but possible -
@TELE-HO hydraulics = water?
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@fazel
my assumption… pouring rain and the baro holes right next to the wrist… it seals great and the movement could create pressure that causes a down spike. once relieved it shows an up spike.
for our luck the recording is not set to every second as it was possible with Ambits, hence it’s somehow equalling out a bit… or let’s say it would be worse -
@TELE-HO Sleeve pump effect?
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@Fenr1r That’s how I normally wear it, but you’re probably right
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@stromdiddily said in Suunto 9 baro very low elevation gain vs other brands:
That’s how I normally wear it
But you don’t normally get this distorted result in the same conditions?
Unless you’ve changed jacket materials or the rain on that run was unusually chubby, my beautiful theory has probably been slain by ugly fact. I’d like to be at least plausible but some other variable(s) must be at work.
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@Fenr1r new shake dry jacket (is quite nice actually lol)
Honestly it’s a one off, so not too concerned about it. I just thought it was interesting as I expected to see a super human type jump but instead saw fairly reasonable up/downs on the graph.
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@stromdiddily Hmm.
Maybe less chubby rain, more beady jacket. Anyway, you’re right: add it to the PNW’s supply of post-X-Files/Twin Peaks Things Of Interest.
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I don’t believe that S9B has very low elevation gain… I went from about 730m to about 1’250m and the total ascent is 721m. Ok there were small dips, very very small dips. But not to a sum of 200m.
living sideways
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@freeheeler what type of activity was this?
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@freeheeler not sure its a good example because you went up once and went down once. in hilly routes (many ups & downs like all my routes are) I see the differences. I guess each up I loose some elevation gain.
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@freeheeler thanks. I was wondering if the hand motions were different (I assume they are) and that might have caused some discrepancy? It sounds like the accelerometer data is considered along with the barometer measurements when calculating accent. Others will know more.
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@fazel
it could be possible that I’ve had a similar “setup” like @stromdiddily had recently during his run. Lot of wet stuff and the sensor holes just on top of the jackets cuff.
When zooming in the graph I can see tiny spikes… maybe I should entertain myself tonight and count all the irregular deltas
The last couple of ski tours gave a more reasonable result. I’m not sure if it’s this. But what I actually wanted to point out is that I have the impression that S9B is not calculating way to low. -
@fazel
this graph is from a hike with poles. Hence similar movement like ski touring. When I zoom in the graph is impressively less noisy. It was a dry and sunny day. I assume that raindrops and hence molten snowflakes in combo with a garment can influence the recording.
I did not check the total ascent as this activity has more ups and downs plus a bike ride at the beginning and the end (and a pause for getting wet shirt changed). But just the fact that the graph has less noise is interesting, at least for me
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@freeheeler yes - your analysis seems good.
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Today I experienced something similar to @freeheeler. I went running outside and it was snowing (first snow in a long while in Amsterdam!), and got 47/49 (ascent/descent) on a route where I usually get ~10 meters. Corrected elevation seems something like 12/13 (I did play a little bit with Runalyze).
The common pattern seems to be rain/snow. First time this happen to me.
Also, when I got home the altitude on the watch kept changing rapidly (-3 when I stopped the exercise, 0 when I arrived home, then -2 a minute later, +2 next time I checked, and so on).
Currently the watch is taking a warm bath to calm down
Watch: Suunto Vertical Ti
Blog: isazi's home
