NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Another "emergency navigation" sight reductionmethod
From: Hanno Ix
Date: 2015 Jul 16, 12:28 -0700
From: Hanno Ix
Date: 2015 Jul 16, 12:28 -0700
Greg,
sorry, I did not understand your interpolation method.
I just cannot follow your compact notation.
Could you please give me a detailed example?
Also, I see I lost the original file logAB$$.xls, so I will have to recreate it.
No issue, but patience please!
Just so you can pick from a bowl of cherries, I will take this opportunity
to also create the normalized version I spoke of before.
You will decide.
H
On Thu, Jul 16, 2015 at 11:26 AM, Greg Rudzinski <NoReply_Rudzinski@navlist.net> wrote:
Hanno,
The Micro Ageton Log Sin Cos 10' table as you have posted looks great and works to 1' precision :) For me it is good as is. I worry that adding more to it may clutter the page.
For some the interpolations may be tough. I do the interpolation mentally by taking the log difference then move the decimal right one to get the log value for each minute of arc. See attached RIC example for a same name reduction. The key to this table is that all "A" are Log Sin and all "B" are Log Cos for the basic Ageton format.
Hav Doniol reduction is several minutes quicker with no special rules but it is always good to have a second CN reduction method in the tool bag as a check.
Greg Rudzinski
From: Hanno Ix
Date: 2015 Jul 16, 08:05 -0700This normalization would increase the table resolution by ~4 in the same space.becomes 1000.00. All other values would, of course, scale proportionally byI propose to normalize - meaning scale - the entire table such that this valueAt 0 deg 10' the table value is 253.63 which is the biggest value on the table.Greg, Herman
Greg
before I go ahead:
the same factor, namely 1000.00/253.63.
It would not affect the function of the table in any other way.Should I?
____
Attached File:
(Micro-Ageton-RIC-Example.jpg: Open and save)
