Altitude/Climbing Anomaly in 9.23-9.27 Road Cycling, Walking with GPS only, GPS + Gallileo

I do the same training ride for quite a while now. The ascent is usually around 80m. This the new software upgrade I now mange 4100m climb, I've never been able to do this before!

Mode in Road Bike, GPS only mode. Edit: The pictures show the altitude graph

9.23

previous version as it should be:

Edit2: As a side note: the barometric pressure looks fine in both versions

0 8246374 over 2 years ago

Important Note:

I just noticed that "Height Corrections" were disabled in connect. So I wonder if the new version, did reset this setting.

After re-enabling "Height Corrections" the climb was 166m instead of 4836m.

If you have this issue, make sure that "Height Corrections" are enabled.

Edit:

I double checked the old rides. With version 8.64 Height Corrections were disabled, but still fine. Thus enabling height corrections mitigates this issue to some degree, but the version 8.64 did not show this problem at all.

0 tmk2 over 2 years ago in reply to 8246374

8246374 said:
I just noticed that "Height Corrections" were disabled in connect.

Height correction is disabled by default for devices with a barometric altimeter.

Enabling height correction ignores altitude data collected by the watch, and instead uses elevation data from an online DEM database. This has its own drawbacks, so might not be a good solution for everyone.

0 8246374 over 2 years ago in reply to 8246374

Push

This problem still persists. in 9.27

0 trux over 2 years ago in reply to 8246374

8246374 said:
This problem still persists. in 9.27

The drops in the elevation graph are caused by wind gusts entering the sensor port opening (higher pressure » lower elevation). Protect the sensor opening with a sleeve, sweatband, or even with a tape, and it will improve the smoothness of the graph significantly.

0 8246374 over 2 years ago in reply to trux

LOL you are kidding?

So when I mount the watch on my handle bar, the air does not hit the sensors directly and it is OK, but if I wear it on my left wrist, the wind hits it directly, and causes the issue. Is that right?

0 trux over 2 years ago in reply to 8246374

No, not kidding. And I am not sure whether the handle bar mounting is sufficient - I do not use it, so cannot comment. However, I do know the protecting of the sensor opening on the wrist does work.

0 8246374 over 2 years ago in reply to trux

Thanks for your advise, I will give it a try.

0 Yeti over 2 years ago in reply to trux

Interesting thought, my elevation looks pretty accurate. Here e.g. going up and down the same mountain only with a small change of route at around 7.5km

Without correction

317,0 m

Total Ascent

310,0 m

Total Descent

845,6 m

Min Elev

1.163,2 m

Max Elev

With correction

338,8 m Total Ascent

334,1 m Total Descent

847,3 m Min Elev

1.188,6 m Max Elev

But I can see how on a road bike it would make a bigger difference, specially with extra head wind

What are your altimeter settings?

0 8246374 over 2 years ago in reply to Yeti

Yeti said:
What are your altimeter settings?

Good point.

Auto-Calibration is enabled
Sensor mode is automatic