Calibrate altitude?
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 It shows negative altitude for me definitely wrong, how can I calibrate it? 
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 During an activity ? 
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 @Kai-Liu said in Calibrate altitude?: It shows negative altitude for me definitely wrong, how can I calibrate it? I have differences up to 3 m between ascent and descent. Today 820 m ascent, 817 m descent. I checked 20 activities and no problem so far. I check the altitude at the start with the S7 app and the activity mountain biking, where I can see the actual altitude. Always correct up to now. Difference to my location up to 5 m. 
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 @Kai-Liu sync with the phone and suunto app before start the activity it should help. 
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 @pilleus 3-5 m can be caused by an small pressure oscillation due weather change 
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 @jseguir it’s okay for me. Ambit 3 does have the same result at the end of the activity. S7 is very precise!  
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 @Dimitrios-Kanellopoulos yes. It got automatically fixed by the way … on my third use it is pretty accurate. I run near a beach and it shows 10m altitude (the real altitude should be around 5m) but I am pretty happy with the result. 
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 @Bulkan yeah maybe it just need more time to collect some data. On my third use it turns accurate. Thanks 


