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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Position from altitude and azimuth.
From: Bill Lionheart
Date: 2020 May 19, 17:04 +0100
From: Bill Lionheart
Date: 2020 May 19, 17:04 +0100
lat 40 azm 10 is one of the bendiest ones I found (with apologies for the cartography, which I cribbed from here https://mathematica.stackexchange.com/questions/3646/how-to-make-a-3d-globe)
OK enough of this! Enough sleep lost.
Bill
On Tue, 19 May 2020 at 16:16, Frank Reed <NoReply_FrankReed@fer3.com> wrote:
Bill,
After I said on Facebook this a.m. that I was done for the night, just as you were waking up in your longitude, I stayed up another hour having a nightcap and wrote a little bit of code to generate KML (Google Earth viewable) files of the "isoazimuth curves." And yes, I'm convinced now. They are only approximated by small circles in the case of high Dec (Polaris, e.g.). Sample below for Dec=80°. In other cases, the curves are sometimes roughly small circles for certain azimuth ranges, but they quickly become radically different curves.
Frank Reed
File:
File:
