Suunto 9 baro very low elevation gain vs other brands

fazel · 15 Jan 2021, 14:19

@freeheeler what type of activity was this?

Oktan · 15 Jan 2021, 14:46

@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.

freeheeler · 15 Jan 2021, 15:10

@Oktan
actually it is a bad example as there’s nothing easier than one consecutive ascent

@fazel
it was ski touring

fazel · 15 Jan 2021, 15:31

@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.

freeheeler · 15 Jan 2021, 15:38

@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.

freeheeler · 15 Jan 2021, 16:44

@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

fazel · 15 Jan 2021, 16:49

@freeheeler yes - your analysis seems good.

isazi · 16 Jan 2021, 16:42

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

freeheeler · 16 Jan 2021, 16:43

@isazi said in Suunto 9 baro very low elevation gain vs other brands:

the watch is taking a warm bath

you have to treat nicely what you love

Oktan · 5 Apr 2021, 09:44

Hi again,
Sorry, but I’m still annoyed by this issue.
Both S9B and A3P on handle bar, recorded exactly the same ride: S9B recorded 539m elevation gain and A3P recorded 641m.
How could it be?

A Former User · 5 Apr 2021, 10:28

@oktan said in Suunto 9 baro very low elevation gain vs other brands:

Hi again,
Sorry, but I’m still annoyed by this issue.
Both S9B and A3P on handle bar, recorded exactly the same ride: S9B recorded 539m elevation gain and A3P recorded 641m.
How could it be?

both calibrated at the begining of the activity?