Celestial Navigation Revisited

11Bravo · 05-05-12, 10:47 AM

We started on the Equator and shot 3 navigation stars separated by about 120° in bearing to get a nice shaped error triangle. All the site reductions are shown together with the almanac data from the two assumed positions. The error triangles nearly coincide and the correction at these latitudes are almost nonexistant. Also shown is a 30 km circle for reference.

I should say something about the clocks. These shots were done with the screen time at 0001, 0002, and 0003. Since I started the mission in nautical time zone +2, my base time is +2 and I need to add that to the screen clock to get GMT. The excellent results shown give us confidence in several things...the clocks, the sextant, the almanac, and the method of graphing the result.

Now we move to 45°N.

05-05-12, 10:47 AM	#15
11Bravo Medic Join Date: Dec 2006 Location: Error Triangle Posts: 168 Downloads: 157 Uploads: 0	We started on the Equator and shot 3 navigation stars separated by about 120° in bearing to get a nice shaped error triangle. All the site reductions are shown together with the almanac data from the two assumed positions. The error triangles nearly coincide and the correction at these latitudes are almost nonexistant. Also shown is a 30 km circle for reference. I should say something about the clocks. These shots were done with the screen time at 0001, 0002, and 0003. Since I started the mission in nautical time zone +2, my base time is +2 and I need to add that to the screen clock to get GMT. The excellent results shown give us confidence in several things...the clocks, the sextant, the almanac, and the method of graphing the result. Now we move to 45°N. __________________ "Sounds of terror are in his ears; While at peace the destroyer comes upon him." -- Job 15:21