Tauno,

> The air pressure decreases around 1 hPa / 27 ft of altitude at surface
> altitudes. Are you at sea level?

I fully forgot about that.  And no, I'm not.  I'm 7 stories up, with the
base of the building likely at sea level, or less than 5 meters up (there is
a canal close by).

But something is still odd: that 27 ft translates to about 8 meters, and
even when I'm generous thats adding about 3 hPa.  That still leaves about 4
hPa unaccounted for ...

Regards,
Rudy Wieser

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