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-----Mensaje original-----
De: NavList@fer3.com [mailto:NavList@fer3.com] En nombre de Paul Hirose
Asunto: [NavList 1442] Re: Navigator's Newsletter, and other forums.


Have you read Kaplan's "navigation solution" paper at the USNO site?
http://aa.usno.navy.mil/research/celnav.html
...
His algorithm may give an error estimate. I can't remember. It's used in
the Navy's STELLA software, which unfortunately is not available to
civilians. If you could create an open-source implementation of Kaplan's
algorithm, that would be some accomplishment. 
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I have programmed the Kaplan algorithm (1), in two versions, one with the 
rhumb line equations for the oblate Earth on his articles, and another 
simplified with mid-latitude formulas derived by my own.
For Least squares I use a commercial package: LabWindows/CVI by National Instruments.

The algorithm calculate the observer's position (Lat, Lon), the SOG and the 
COG, for more than 8 observations. The STELLA software uses the input of a 
star tracker to automate the process.

I have now the implementation of the algorithm running in a command line 
program, and in a not very remote future, I want to do a MMI, (man machine 
interface) available in my web.

I promise to write an article explaining the algorithm and containing the 
source code in C/C++. (before 3 months??)

Andr�s
http://www.geocities.com/andresruizgonzalez

(1) Determining the Position and Motion of a Vessel from Celestial 
Observations. Kaplan, G. H. (1995). Navigation, Vol. 42, No. 4, pp. 631-648.

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