@Dimitrios-Kanellopoulos said in [Watch] SSU : altitude changes with temperature:
This is normal behaviour.
The altitude calibration from the GPS is never correct near by sea level. I am now actually at sea level for 1 mont and most devices report GPS altitude of -7.
To obtain the altitude check also some phone app about what GPS reports.
When you run the watch uses a feature called fused alti that calibrates constantly the altitude according to GPS reference combined with the readings of the pressure sensor.
When you start a move at the first 10 mins it tries to calibrate the altitude of the starting point. Eg like auto calibrating it your self , but actuality happening while running.
Thus you can have a different end point.
Also keep in mind the pressure sensor can be offset by many factors that’s why fused alti is there. To “peek” also from another altitude source.
Regarding the different gains , the barometric pressure change can affect it, however , also the route can.
That is why Suunto count ascent , at a -+3m threshold.
That means that if you don’t climb 3m in some minutes and you only climb 2 then it does not count.
So for example of you were runninh stairs up, and you did 2 stairs of 1m each it will not count. But if you did 1step again after doing the steps it would. This exists there to reduce noise, eg even arm movement that passes 1m etc etc.
I hope it helps.
PS to test your sensor , try to rub behind the watch , eg increase temp and see if altitude changes. Or if you are at the sea place , wear the watch , leave it aside, wear it again and you should have always the same altitude. That’s is how I detect those so far.
Hello and thank you for your explanation. I’m going to think about it.
