Re: Great Circle Calculations

2007-07-20 Thread Th. Taudin Chabot
Peter, I am afraid that the webpage you mention doesn't exist (anymore). Thibaud Chabot At 02:18 20-07-2007, Peter Mayer wrote: Hi, Since radio wave travel in Great Circles, hams need Azimuth maps to know where to point direction antennas. I've downloaded one called Azimuth Map, and the

Great circle calculation

2007-07-20 Thread Richard M Koolish
There are a lot of navigation calculations at: http://williams.best.vwh.net/avform.htm It includes the distance and course between points. --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Great Circle Calculations

2007-07-20 Thread Peter Mayer
Dear Thibaud, Oh! Here's a web site which does seem to have it. Scroll down to the alphabetical listing; it's the fourth one. There are other Great Circle programs available from the site as well. http://www.dxzone.com/catalog/Software/Grid_Bearing_and_Maps/ best wishes, Peter Th.

RE: Great Circle Calculations

2007-07-20 Thread John Lynes
Any map drawn in gnomonic projection has the property that all great circles are straight lines. To plot a great circle on such a map, just draw a straight line from your departure point to your destination. Any book on map projections will tell you about the gnomonic projection, but you