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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Position from crossing two circles : was [NAV-L] Reality check
From: Andr?s Ruiz
Date: 2006 Jun 8, 11:47 +0200
From: Andr?s Ruiz
Date: 2006 Jun 8, 11:47 +0200
Yes, that's right thanks -----Mensaje original----- De: Navigation Mailing List [mailto:NAVIGATION-L@LISTSERV.WEBKAHUNA.COM] En nombre de Herbert Prinz Enviado el: jueves, 08 de junio de 2006 11:25 Para: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM Asunto: Re: [NAV-L] Position from crossing two circles : was [NAV-L] Reality check Hello Andres, There is a bracket missing. It should be: S ( [Sin Ho - [sin Dec sin Lat + cos Dec cos Lat cos(GHA+Lon) ] ]^2 ) Herbert Prinz Andres Ruiz wrote: > *2. Position from n circles of equal altitude* > > Here the problem is there are a lot of crossings between the circles. > Metcalf & Metcalf, (On the overdetermined celestial fix - Refer to the > Bibliography section at the link below), developed a method based on > Lagrange Least-Squares minimization of the equation: > > S ( Sin Ho - [ sin Dec sin Lat + cos Dec cos Lat cos(GHA+Lon) ]^2 ) >
