Elevation gain totally wrong (data nerds please help)
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Hi together, i have a question regarding the elevation gain in my latest ski touring activity.
Usually the altimeter in my suunto watches (Ambit 3, 9 Baro, Vertical) are totally reliable and i cannot explain the wrong elevation gain in this case:The watch tracked 2600m total ascent, but the real total ascent should be only around 2000m.
The starting und peak altitudes are both correct.
When i sum up the three ascents it’s about 1906m - plus some meters forth and back the ridge to the summit.
During the activity I used a route in the map for navigation.
Here the activity:
Strava: https://www.strava.com/activities/10558289281
ST: https://www.sports-tracker.com/workout/michaelhaider170/65a402d5f8c176043a8470e2 -
@mikeorbreak bonjour déjà eu ce (problème) la montre m’a donné le dénivelé du tracé que j’avais récupérer sur le web qui était faux et non le dénivelé réel. J’ai refait le même parcours 1 mois plus tard sans le suivi et le dénivelé était ok
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@mikeorbreak The SportsTracker graph is not helpful, can you post a link to the Suunto app?
Were you wearing the watch outside or inside of clothing? If the baro sensor was covered or had clothing pushing up against it this could change the reading. -
@Brad_Olwin dommage je n’ai plus l activité enregistrer j’ai supprimé mon compte suunto et en est recréer un nouveau je pensais que sa allait supprimer le bug des scores d entraînement mais non je portais la montre sans rien dessus
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@ggrego I don’t speak French but translated this, I looked at the Strava profile and the elevation plot is not smooth. It is possible clothes or your skin was pushing air up against the baro sensor, this causes the watch to sense a change in pressure and will affect altitude. Alternatively, if a lot of water accumulates at the sensor from melting snow this can affect readings as well.
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@Brad_Olwin
Link Suunto app: https://maps.suunto.com/move/michaelhaider170/65a402d5f8c176043a8470e2I wore the watch between jacket sleeve and glove. So yes it was partly covered sometimes.
But this has never been a problem before. -
@mikeorbreak oui c’est bizarre régulièrement je fais tremper la montre dans l eau tiède et rince à l’eau claire au niveau du capteur du baromètre il peut y avoir des saletés dedans qui fausse les mesures
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@mikeorbreak à mon avis vue le tracé là montre à bien gérer si on calcule vite fait ont est a 1900 de dénivelé sur 3 montées et le départ et l arrivée et a 2 mètre près la même
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@mikeorbreak said in Elevation gain totally wrong (data nerds please help):
@Brad_Olwin
Link Suunto app: https://maps.suunto.com/move/michaelhaider170/65a402d5f8c176043a8470e2I wore the watch between jacket sleeve and glove. So yes it was partly covered sometimes.
But this has never been a problem before.This is what happened, water or air movement. If you look at the expanded altitude graph you will see a lot small spikes. This caused the extra elevation gain. Spikes are evident near the max summit of your ski.
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@Brad_Olwin
OK, i get the spikes - but i can’t believe these result in an additional gain of 600m… -
@mikeorbreak
600m seems effectively a bit “huge”, but don’ neglect the altitude measurments filters which are also applied in the watch.
2600mD+ is what your watch “officially” announce, applying its own filters.
i recomputed your activity, applying, to the raw fit file (which content is already a resultant of watch internal computation (with fusedalti, and so)), with different altitude filters (original (2600mD+), 7m, 3m, 1m).
with same altitude values, your D+ is between 2014mD+ and your 2600mD+
As far as i remember, new D+ algorythm in Suunto watches, is taking into account any meter of ascent (https://forum.suunto.com/post/100204) , so something nearer to 2378mD+ could be more real (according to altitude data saved).
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@mikeorbreak I have had more than that!
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Hi @mikeorbreak did you resolve this issue? My Suunto Vertical doing exactly as yours is. Added about 600m to a run which should have and about 2400m elevation. Constantly adding meters to even short activities.
Have followed all the advise trouble-shooters to no avail. Only wear the watch on wrist with no clothes covering it.
