Ascent / Alti / Baro accuracy

Antoine

Hello,
My vertical mesured 4100m of ascent but on several website (also in suunto app) the total ascent is around 3500m.
How could we explain that ?
Is there something to do to improve accuracy ?
Do you have also such différence ?
It was in moutain and it was cloudy.
Thanks

Tieutieu

@Antoine which route ? where ? what weather conditions ? Lot of small up and downs ??
SV resolution is 1m every time there is more than 4m variation…a lot of things could explain why your watch ascent is higher than “maps” models that have not the same resolution at all.
But I would say that your watch is probably the clothest from reality.

Antoine

@Tieutieu this one:

https://www.openrunner.com/route-details/19422355

On suunto app i have 36km.and 4100m ascent

Some wind and some clouds

sartoric

@Antoine
you need to check the altitude graph that the watch record, to see if you have issue (small bumps) with altitude

Antoine

@sartoric ok, i have downloaded the FIT file and converted it in Excel file.

If i take altitude point every 30s and keep only positive ascent i find a cumulative ascent of 3549m instead of 4100m in suunto app.

3549m seems closer to the right ascent.

Can someone of suunto support (@isazi ? @Dimitrios-Kanellopoulos ?) look at this issue ?
It seems more a Suunto App issue

Update :

same with every 15s, i find a total ascent of 3692m
algorithms from Runalyze give 3538m