NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Index checks with laser and without
From: Alexandre Eremenko
Date: 2007 Jan 4, 12:35 -0500
From: Alexandre Eremenko
Date: 2007 Jan 4, 12:35 -0500
Dear Ken,
I mostly take Lunars from my balcony.
Only once (in fall 2006) I took them
from a nearby Nature reserve area
(1 mile away) and the average error was +0.8'
and pretty consistent in 3 DIFFERENT star-lunar distances.
I mean I used 3 different stars.
{}From the balcony about 50% of all Lunars are perfect
(that is the averages are within 0.2')
But another 50% have errors of 0.4' to 1'.
Alex
On Thu, 4 Jan 2007, Ken Muldrew wrote:
>
>
> On 3 Jan 2007 at 23:45, Alexandre E Eremenko wrote:
>
> > What makes it really strange is that the error
> > when present is usually constant in long series.
> > So averaging does not help. I would almost say
> > that it is constant during a day... though this is
> > not always so. It looks like it depends on...
> > weather:-) Thopugh I understand that this idea
> > is absurd. Some new kind of strong abnormal refraction
> > in Indiana?
>
> Does this intermittent error only show up when you take lunars from a
> particular location (e.g. your balcony) or have you also suffered from it
> in other locations?
>
> Ken Muldrew.
>
> >
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