"Ron McKinnon" wrote in message
news:nWn5e.924843$6l.234357@pd7tw2no...

"Matt Barrow" wrote in message
...

The way I see it, if you have two stations, one on the ground at 350
feet
MSL, and the other on the ground (on top of a mountain) at 5000 feet
MSL,
and they are both "nearby", then the one that is actually at 5000 feet
MSL
will give an altimeter setting that will be more accurate for an
airplane
that's flying at 5000 feet MSL.

Both stations use a corrected reading; it's the altimeter aboard the
aircraft the will need to adjust for temperature, air pressure being
constant.

... which suggests you don't.

(Air pressure being constant??? The whole point of the altimeter
is that it isn't, with altitude. What are you trying to say here??)

Sorry...wrong choice of words...SB "does not oscillate within the column of
air (i.e., it's predictable)".

Funny, after 20 or so replies, no one has answered the original question,
only reprinted the explanation of air pressure from the first week of ground
school.

The original point was that +/- "ATC uses reading front reporting stations
on hill tops, rather than from stations nearby in valleys". Gee, I have
terrain over 13000 feet high just a few miles from here, but they (ATC) use
the Montrose or Grand Junction station readings.