NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Longhand Sight Reduction
From: Hanno Ix
Date: 2014 Jun 10, 19:37 -0700
Your example sure is correct. I will have to check the trig of the formula
or did you or Frank already?
From: Hanno Ix
Date: 2014 Jun 10, 19:37 -0700
Greg,
GREAT - this is so much along my lines.
However, if it is correct my face will turn green of envy ; )or did you or Frank already?
Beware though: As Frank said, the cos() will be negative when
L- d or L+d is outside +/- 90 deg.
Now my plug of old:
The only thing left is turning all deg to arcmin in our tables and forgetting the awkward sexagesimal calculations. Everything will be integers, decimal and of 4 digits only, plus the tables will be more compact.
The only thing left is turning all deg to arcmin in our tables and forgetting the awkward sexagesimal calculations. Everything will be integers, decimal and of 4 digits only, plus the tables will be more compact.
I promise, things will become easier yet.
Great stuff
Hanno
_______________________________
_______________________________
PS: worked today on Bygrave's internal math. There is a pleasant
surprise. But after Daniol who needs a Bygrave still? :)
On Tue, Jun 10, 2014 at 10:21 AM, Greg Rudzinski <NoReply_Rudzinski@fer3.com> wrote:
There may be a few rules that apply to L+d > 90° and L-d as a negative value.
http://fer3.com/arc/m2.aspx/Longhand-Sight-Reduction-Rudzinski-jun-2014-g27982
