NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Hav-Doniol checker
From: Stan K
Date: 2015 Jun 18, 10:21 -0400
From: Stan K
Date: 2015 Jun 18, 10:21 -0400
Hanno,
About your sign convention suggestion, unless I am not thinking clearly (wouldn't be the first time), the only difference I can see in the program is that there would be no need to show "(same name)" or "(contrary name)" by the value. Am I wrong?
Stan
-----Original Message-----
From: Hanno Ix <NoReply_HannoIx@fer3.com>
To: slk1000 <slk1000@aol.com>
Sent: Wed, Jun 17, 2015 7:52 pm
Subject: [NavList] Re: Hav-Doniol checker
If you permit my advice re: sign convention itH would be to implement both and let the user switch from one to the other so one can see how each of them work and what the differences are.
From: Hanno Ix <NoReply_HannoIx@fer3.com>
To: slk1000 <slk1000@aol.com>
Sent: Wed, Jun 17, 2015 7:52 pm
Subject: [NavList] Re: Hav-Doniol checker
Stan,
works great!
It also demonstrates the simplicity of the calculations, very nice!
I
On Wed, Jun 17, 2015 at 3:31 PM, Stan K
<NoReply_StanK@fer3.com> wrote:
Thanks to those of you who responded to my question about whether L and d should be treated as signed or unsigned in the hav-Doniol solution when being taught to students. Unfortunately, there were not enough responses to make a statistically sound decision. FWIW, I am leaning toward treating them as signed.In the meantime, I made a hav-Doniol work checker for Windows (first beta attached) which should allow people just learning the method to easily check their math and haversine table use. It is in the style of the Celestial Tools SR Methods tool. It uses Gary's format, which Greg seemed to like. It also includes the option for four- or five-place haversine tables. It just gives the result of the multiplication, without showing any work, since it seems that we all have different multiplication preferences.For L and d with tenths of minutes, the math is done with the values unrounded, and the results rounded to whole minutes.As some email clients do not allow executable attachments, the program has an exx suffix. Change it to exe before running.
[from FER: changed to a .zip archive... just download and open]Let me know what you think.Stan
Attached File:
(hav-Doniol-check.zip: Open and save)
