There can be some effects at high altitudes for vhf/uhf stuff. there can be
tropo ducts that are only experienced above a certain altitude. It is also
used in figuring line of sight paths for microwave hilltopping.
I haven't seen anything that uses it for wind survival, but at 1900' amsl
here I get higher winds than the guys a few miles away at 900' do. And of
course the fastest wind ever recorded was on the top of mt. Washington.
Besides when you read a topo map that is what you get, you don't get haat,
you get amsl.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: towertalk-bounces@contesting.com [mailto:towertalk-
> bounces@contesting.com] On Behalf Of Tom Rauch
> Sent: Friday, July 08, 2005 16:04
> To: towertalk@contesting.com
> Subject: [TowerTalk] Ground level and sea level
>
> OK, I just have to ask.
>
> Why do Hams use height above sea level since it is almost
> meaningless for anything we are dealing with?
>
> I see it for getting out at HF, VHF, and even wind survival
> discussions.
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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