Low Ascent Values
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Hi, can somone give me some help with this problem I seem to have on my S9.
I get always less ascent gain than the reality, I have already compared with Strava values and the difference sometimes is half than it should be.
On the picture you can see value that shows on the watch (92m),
The graph is ok, and the value on the lap table I think it is ok too.Thanks
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S9 without baro? If you search the forum you will find plenty of discussion on this topic. The short version being that the non baro has a 7 meters threshold to account for ascent/descent.
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@isazi said in Low Ascent Values:
The short version being that the non baro has a 7 meters threshold to account for ascent/descent.
Thanks for the quick answer, what do you mean with 7 meters threshold?
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@Nelson-Sousa
the watch counts 7m ascent after it passes 7m of consecutive ascent… and 14m after the next 7m… if you descent before 7m it does not count but starts counting again after a certain time.
so rolling hill will give you less ascents… consecutive climbs will be more realistic. -
Yeah I have exactly the same issue… And i do not see how your explanations help… I have a total 162 m ascent in the overall description of the activity. However in the 10km by 10km “laps” view my total ascent is 270+m . This value is in line with the itinerary create using the sunto app… So why is the total ascent not corrected by the sunto app ? It is kind off a big issue to have so many different values.
Plus, when i export the fit data the altimetric profile an save it to my itineraries the altimetric profile is absolutely off… When the one from teh activity is correct. But not the computation of the total ascent descend and the profile from the watch… Really dissapointing
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@Arnd-Msr
if you search the forum, there are manymany discussions and explanations around that topic. I just tried to boil it down into few sentences.
GPS alti is always less accurate as barometric and to avoid even worse measurements Suunto has decided to go for 7m threshold… could also be 5… with barometric it is 3m to avoid bad measurements. -
Yeah i get that the algorithm needs a threshold.
However I do not conceptually understand how all the altitude measures from the app are not uniform… How can I for one exercise have multiple measures of altitude gain … (with over 100m difference) -
@Arnd-Msr
Did you try a soft reset ? Just to be sure that the watch isn’t somehow stuck. -
@sartoric No I haven’t … Its actually quite new (2 weeks). And i have had issues with all my measures… however this is the one n which i most noticed it (almost 50% less than expected). And it is not so much the fact that the watch has the 7m threshold and that its values are different than what the app is capable of doing from the gps file of from the altitude profile that is the issue… The issue is that i cannot tell the app which one is closest to the truth… The truth probably lies somewhere in the middle and that the sunto application gives multiple ascent values for one activity depending on wher eyou look at…
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@Arnd-Msr what I remember is that the altitude values for the auto-splits (5-10k) are/can be totally bogus in the app. It’s a known bug, or at least it is known on this forum.
