Altimeter / Barometer calibration issues

[0x01]

Hello,

I have problems calibrating the altimeter of my 65s, latest firmware.

When I enter the known altitude manually, then the altitude will not become effective.
When I select to use altitude from satellite this seems to work.

Does someone experience the same? Or is there some magic Garmin algorithm?

Regards
0x01

[GPSrChive]

What firmware version is installed, please?

You say the 'latest', and today we have a good idea what that might be, but someone reading this post a year or more from now will not.

[0x01]

firmware version 4.50

Would be nice if some other people could report the same or could tell how it works - maybe I have a misunderstanding or there is a special feature which may make any sense - since dualband GNSS position may be given trust above manual input, etc.

[GPSrChive]

We just tested out GPSMAP 65s v4.50, calibrated the Altimeter using a 'known value' that was about 100 feet higher than what the GPS elevation reports, and we see exactly what we entered in the Trip Computer Data field +/- 3 feet. This appears to be working properly.

Why do you think your GPSMAP 65 is not working properly?

Screen captures may help explain your issue....

[0x01]

Hm, this is odd. I was observing this already long ago (more than 1 year) on a public geo reference point. But not followed-up.
I observed today that by resetting the trip computer the altitude seems to be set to the GNSS altitude.
I am reading the altitude from the trip computer page which seems to be the optimized altitude out of GPS and barometer.

[GPSrChive]

Are you now satisfied with the way it is working, or do you still think there is an issue? I can not determine for certain from your comments.