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Altimeter- and GPS-issue during climbing

Hello,

I had two issues with my 5X Plus during mountaineering last weekend:
1) at the peak (2307m), the watch only showed 2213m. How can I avoid such incorrect measurements? I have set Auto Calibration during activity to Continuous - is this the wrong setting?
2) like you can see on the picture, I had some big GPS outliers during the activity (scale 300m). Although the conditions for GPS were really bad (overhanging rocks, cirque with a lot of GPS relections), this shouldn't happen. In my opinion the watch should ignore such big leaps and should not record them. There should be the technical possibilty to determine bad GPS, ignore it (and filter values like my max speed of 197,6km/h which is complety irrational for this activity) and interpolate the track. I had GPS+Galileo activated.
By the way: does the Fenix 5X Plus support WAAS/EGNOS?

Thanks. ciq.forums.garmin.com/.../1373584.jpg

0 renton82 over 7 years ago

I bet that your 1st issue is this: https://forums.garmin.com/forum/on-the-trail/wrist-worn/fenix-5-5s-plus/1366374-here-we-go-again-altimeter-is-wrong-on-fast-ascent

0 Volker over 7 years ago

To be sure, your device was calibrated to the correct altitude at the starting point?

0 renton82 over 7 years ago

Look at this video, the reason is this : https://youtu.be/b7_hfeqsBOM in the case there are quick changes in atmospheric pressure, altimeter is slow to react.
It is the same bug that I had on my previous Fenix 5X that I sold for this reason. The bug was introduced with 7.0 firmware and never corrected even if I reported it almost 10 times. If I reverted to 6.xx firmware the bug disappeared, so it is a SW issue. This is the video of my previous 5X : https://youtu.be/jZdI7rPRVaQ . This bug appear also when you try to calibrate altimeter after a swim...

0 eupesco over 7 years ago

No, I did not calibrate it at the starting point. I did not think that this is necessary. What is the primary source of the watch for the altitude? GPS or the pressure? How is it combined?