On 31.12.18 13:15, NY wrote:
> "Axel Berger"  wrote in message

> It's interesting to hear people say that variations in pressure caused
> by gusts are sufficiently small that they do not swamp the variation of
> pressure with altitude. Without doing the sums, I don't know how much
> the pressure varies with altitude, but my gut feeling (which is
> evidently wrong!) would have been that it was smaller than the
> variations every time there is a gust of wind. Good thing that it's not
> the case, otherwise pressure-driven altimeters would be unusable.

The altitude change with pressure in standard conditions near
sea level is -27 ft/millibar (or -8.1 m/mb).

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-TV

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