NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: query
From: Glendon
Date: 2002 Aug 22, 09:06 +1000
From: Glendon
Date: 2002 Aug 22, 09:06 +1000
Oh, I forgot, that site also has Vincenty's method in downloadable Excel Spreadsheet form...see, http://www.auslig.gov.au/geodesy/datums/calcs.htm while I haven't looked, the formulae must be embedded in the spreadsheet cells. As other posters have noted, Vincenty's method is a bit of overkill in terms of accuracy required for navigational problems Lee Martin ----- Original Message ----- From: "Glendon"To: Sent: Thursday, August 22, 2002 8:43 AM Subject: Re: query > As Vic Fraenckel has noted, Vincenty's formula, direct method, will provide > an ellipsoidal solution to your problem. For an online application of > Vincent's formula and reference to his original article, go to > http://www.auslig.gov.au/geodesy/datums/vincenty_direct.htm > ----- Original Message ----- > From: "Mitch B Burrill" > To: > Sent: Thursday, August 22, 2002 4:54 AM > Subject: Re: query > > > > Thanks Michael, > > It would be constant TC. Sorry, but I only discovered what a rhumb course > was a few hours ago. > > I am rapidly becoming obsessed with navigation ! > > > > Mitch > > > > Mitch Burrill > > mburrill@leesburgva.org > > > > -----Original Message----- > > From: Michael Wescott [mailto:wescott_mike@EMC.COM] > > Sent: Wednesday, August 21, 2002 2:43 PM > > To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM > > Subject: Re: query > > > > Mitch B Burrill writes: > > > If I am at lat1, long1, and go XXX nm at TC YYY, What is the exact > > > formula from spherical trigonometry to get lat2, long2 ? > > > > I would argue that the problem is not sufficiently well specified. > > > > Is TC=YYY merely the initial course for a Great Circle trip during > > which the course will generally vary as the trip progresses. Or is TC > > to remain constant for the whole trip, i.e. a rhumb line course? Or > > something else altogether? > > > > -- > > Mike Wescott > > Wescott_Mike@EMC.COM >