NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: A fluke of 0.0 intercept with Altair.
From: Jeremy C
Date: 2010 Sep 21, 19:51 EDT
From: Jeremy C
Date: 2010 Sep 21, 19:51 EDT
It is great that you got the "feel" Paul. I feel the same thing when
I am in the groove (and the opposite feeling when I "know" a sight was
bad) . It's a real joy when you get that feeling for a whole round of
sights!
In my experience, when you start to get that feel on a regular basis, you
are truly mastering the art of the navigation. Mastering the
math/science of CelNav is another matter altogether.
Jeremy
In a message dated 9/21/2010 5:54:49 P.M. Eastern Daylight Time,
pw.jackson@xtra.co.nz writes:
Hi & thanks to all you guys for the cross check on my shot of Altair.The thing that stands out for me is the moment i marked tangent with the push of the button on my watch i felt very confident in the "feel" of the sight and the results seem to bear this out.Antoine,yes i have used the US Naval Observatory Software & like all things the US navy do it is excellent.Many Thanks again Regards Paul W Jackson.
--- On Wed, 22/9/10, Mike Burkes <m_burkes@msn.com> wrote:
From: Mike Burkes <m_burkes@msn.com>
Subject: [NavList] Re: A fluke of 0.0 intercept with Altair.
To: navlist@fer3.com
Date: Wednesday, 22, September, 2010, 7:29 AM
Hi folks, Via HO 229 LOP straight thru DR. The real bugaboo was what appeared to me that angles were decimal until I went back to my notes of Paul's Venus obs.
Mike Burkes
m_burkes@msn.com
626-833-1521
Date: Tue, 21 Sep 2010 11:06:21 -0700
From: pmh099@yahoo.com
Subject: [NavList] Re: A fluke of 0.0 intercept with Altair.
To: NavList@fer3.com
I am getting the same results (see attached screenshots).
Peter Hakel
From: Antoine Couette <antoine.m.couette@club-internet.fr>
To: NavList@fer3.com
Sent: Tue, September 21, 2010 5:13:27 AM
Subject: [NavList] Re: A fluke of 0.0 intercept with Altair.
Dear Paul,
Congratulations !
With your data, I am also computing a 0.0 NM intercept for a true azimut of 27.1 °.
Best Regards
Kermit
Note : 1 - Most generally, ALL the On Line CelNav Software available on the Internet will perform very accurate Apparent positions for the Stars (certainly well under 0'1), which is again verified with the "Navigation" Software you are using. Accurate Star apparent ccordinates are fairly straightforward and easy to compute with an accuracy of 1" for example.
2 - Have you tried the On Line Celnav Software such as US Naval Observatory ?
It is here : http://www.usno.navy.mil/USNO/astronomical-applications/data-services/cel-nav-data .
Obviously, all Governement Agencies (USNO, and others) compute very accurate CelNav Bodies apparent positions for any time / date in the full range of their validity dates..
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Ref : [NavList 13936] A fluke of 0.0 intercept with Altair.
From: pw.jackson---co.nz
Date: 21 Sep 2010 04:02
Can some one cross check my shot of Altair.
Basic Data:Known position= 36.485 south
174.481 east
Height of eye 6'4"
GMT: 21/09/2010 06:49:36
Hs: 40.262
No index error or watch error.
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