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You can look at the refraction table in the Air Almanac or in H.O. 249
which have refraction corrections for various heights above seea level.

Gary LaPook

George Huxtable wrote:

>
> After an earlier message from Guy-
>
> | "Having just enjoyed a wonderful weekend at Lake Tahoe elevation of
> | 6225 ft. I was thinking about what my height of eye would be if I were
> | taking sites at this elevation? Not that I would be lost on the Lake
> it is
> | 22 miles long by 12 miles wide."
>
> Bill commented-
>
> | It struck me in the shower this AM I may have missed one point that
> had been
> | discussed a year or two ago.  That being reduced refraction in the
> thinner
> | air.  I don't recall the consensus--if there was one.
> |
> | The broadcast barometric pressure will be adjusted to sea level.  At
> 6225
> | feet multiply the broadcast BP by .823 for local BP.  The adjusted
> BP will
> | be off the almanac table, but gives you a starting point.




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