Altimeter recordings while running

[Łukasz Szmigiel]

@Tadas-Linge while OSM may not be perfect in terms of accuracy, 40 m seems like much. Especially in places when the watch reports -9 meters.

How do you wear your watch while running? Was it windy or raining during the run? Can you test it on a different run while wearing the watch on top of your clothes or on a second wrist?

Edit: if you’ve finished with a large, negative number, it seems as if something pushed on the baro sensor. Maybe some dirt (maybe there’s soap in baro holes?) or snow / water?

[sartoric]

or jacket sleeves

[Brad_Olwin]

@Tadas-Linge I think the deviations you are seeing are not acceptable. I would contact support. Prior to that, have you attempted a hard reset on the watch?

[Tadas Linge]

@Łukasz-Szmigiel hello, in the first half of run there was light rain, but then sunny till the end. I doubt that something could go in those small holes…but you nevet know

[Tadas Linge]

@sartoric hello, no jacket sleeve is locked with velcro lock above watch

[Tadas Linge]

@Brad_Olwin hello, no, i have not done any kind of reset. I will try to do it now. Thanks

[Brad_Olwin]

@Tadas-Linge It will remove all custom sport modes and data, you will be starting fresh so if you have custom sport modes take screenshots so you can easily restore them.

[A Former User]

@di-gregorio-roberto Buongiorno, mi servirebbe sapere come eliminare da un sunto vertical un itinerario salvato .erroneamente ho cancellato l itinerario dall app del telefono senza accoppiarlo prima all orologio.in tal modo si è cancellato solo da telefono e non da orologio.fatemi sapere come poter fare . Grazie intanto saluti

to my knowledge if you remove the track from SA instead of disabling it and sync the watch you can no longer remove it from the watch (for now)

please mods move these posts somewhere else

[Tadas Linge]

@Brad_Olwin hello, so today i was running in snow storm, but surprisingly altimeter measuruments were better than ever. I gues reset did its magic. I will make couple more trial runs to be totally sure. What is more, i am in contact with Suunto distributor here in Lithuania and they told if i am not happy with altimeter, they will give me replacement watch and will take mone for investigation. I was really surprised and very happy with such offer, and also, when they are so good for me i do not want to bother them if this is just a question of reset

[Brad_Olwin]

@Tadas-Linge Keep us posted because the altimeter readings you were getting were poor. I have also had excellent service from Suunto. Glad this worked and hope that it solved the issues for you.

[Redbeard_ranger]

@Brad_Olwin Do you or any one know if the Baro in the SV is the same in the Race?

[Tadas Linge]

@Brad_Olwin hello,
so i have completed these 3 trial runs after hard reset. each 20 km, almost the same route. first run and the third one was same direction and second one opposite direction. unfortunately with each run altimeter readings were getting worse. and weather condition with each run was getting better. so i am totally confused here and i think i will give them to check the watch. all data in attached PDF: Suunto altitude after hard reset.pdf

[Mff73]

@Tadas-Linge
Looking at your pdf. Are you saying that altitude difference about 10m is something wrong? .

[Mauerwegler]

@Łukasz-Szmigiel said in Altimeter recordings while running:

All Suunto watches from S-series that have barometer have FusedAlti (S9B onwards).

SSU too:

[Tadas Linge]

@Mff73 hello, not exactly. What i see, that watch fresh after hard reset is showing really good results, but then whith each use it is getting worse.

[Mff73]

@Tadas-Linge
Worse? average dif from 2m to 7m? .

[Tadas Linge]

@Mff73 hello. Yes, so this is just average, but you also need to see point by point, because in the first run there is no deviation above 10, then in second one already one such deviations and in third one there are qoote few 12s and 13s… Dont you think it is tendency? Of course i will continue fill this table, but this is what i see now.

[Iceman1]

@Tadas-Linge I have tried a couple of times to set the elevation far off from the real elevation. Then I let fusedalti correct everything. When I have one this I have a nice elevation graph in the end, starting and ending within1 meter or so.

When I dont adjust, and the elevation from the start is within 10-15 meters off from the real elevation, then that difference is kept, and is not touched by fusedalti.
I understand 10-15 m is not much, but it is very noticable on flat runs.

[isazi]

@Iceman1 because the GPS vertical error is large-ish, calibration is only performed if deviation is substantial. If the deviation is within GPS error, the watch cannot know which one between altimeter and GPS is correct (tie-breaking with only 2 sensors is kinda impossible).

[Iceman1]

@isazi yes I have understood this is the way it works. I just posted a possible way to “trick” the watch, If you like.
Instead of graphs like this starting at -7 m and ending at 5m

I get graph like this starting at 7 m and ending at 8m