[TowerTalk] Take-Off Angles: N6BV's Book "All the right Angles"

[Al Williams]

I, too, have often wondered how the arrival angle is measured.  Does the
method
assume ground reflection as in outgoing signal thus height at maximum signal
would be used to triangulate angle?  A technical explanation would be
appreciated?  What equipment is used and how does it measure?

k7puc


-----Original Message-----
From: David Robbins <k1ttt@berkshire.net>
To: Guy Olinger, K2AV <k2av@contesting.com>; David Clemons <dave@egh.com>;
TOWERTALK@contesting.com <TOWERTALK@contesting.com>
Date: Thursday, July 06, 2000 4:36 PM
Subject: Re: [TowerTalk] Take-Off Angles: N6BV's Book "All the right Angles"


>
>yes, ionospheric sounding systems regularly measure angle of arrival.  they
can
>also measure parameters such as group travel time, echo amplitude, phase
shifts,
>doppler shifts due to ionosphere movement, polarization, wave front
curvature,
>and azimuth deviation.  these sounders operate over ranges of .5 to 40mhz
from
>many locations around the world.  if you have ever wondered what some of
the
>swept carriers are that periodically zip through your receiver its probably
one
>of them.
>
>k1mk has some nice links to some real time ionogram data at
>http://www.qsl.net/~k1mk/#Propagation
>
>"Guy Olinger, K2AV" wrote:
>>
>> Has anybody actually MEASURED incoming angles, does the technology exist
>> for H.F.?
>>
>> - - . . .   . . . - -     .   . . .     - - .   . - . .
>>
>> 73, Guy
>> k2av@contesting.com
>> Apex, NC, USA
>>
>> ----- Original Message -----
>> From: David Clemons <dave@egh.com>
>> To: <TOWERTALK@contesting.com>
>> Sent: Thursday, July 06, 2000 5:40 PM
>> Subject: [TowerTalk] Take-Off Angles: N6BV's Book "All the right Angles"
>>
>> >
>> >
>> > I believe you can still get Dean's book from Radio Bookstore,
>> > but I don't have their phone number or web site handy.
>> >
>> > 73, Dave Clemons K1VUT
>> >
>> >
>> > Dave Clemons
>> >
>> > dave@egh.com
>> > Evans Griffiths & Hart, Inc.
>> > 55 Waltham Street, Lexington, MA 02421
>> > (781)861-0670, (781)860-9321 (Fax)
>> >
>> > --
>> > FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
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>> >
>> >
>>
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>
>--
>David Robbins K1TTT (ex KY1H)
>k1ttt@berkshire.net   or   robbins@berkshire.net
>http://www.berkshire.net/~robbins/k1ttt.html
>
>--
>FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
>Submissions:              towertalk@contesting.com
>Administrative requests:  towertalk-REQUEST@contesting.com
>Problems:                 owner-towertalk@contesting.com
>
>


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