NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2017 Mar 4, 07:33 -0800
Here are azimuth, intercept, time sight, and ex-meridian working notes for Frank's LAN observation set (not for the simple navigation class).
Time sight longitude average 71° 24.6' W (surprised at this result when so close to LAN)
Ex-meridian latitude average 41° 26.9' N
Average intercept for ten observations 0.3' away from assumed lat & lon by LAN and equal altitudes.
Greg Rudzinski
From: Frank Reed
Date: 2017 Mar 2, 13:25 -0800Four hours ago I took a series of Sun sights around local noon. Here's the raw data:
16:35:30, 41° 13.0'
16:40:55, 41° 20.9'
16:48:02, 41° 25.8'
16:55:39, 41° 28.8'
17:00:38, 41° 30.0'
17:02:46, 41° 28.7'
17:06:22, 41° 27.3'
17:12:25, 41° 23.3'
17:19:18, 41° 15.2'
17:23:19, 41° 09.0'Times are UT. Altitudes are Sun LL, as usual. Height of eye 24 feet. Index error was about 3.8' on arc. Can you determine my latitude and longitude from these sights? How many different ways can you come up with to get a fix from these observations? Incidentally, my "northing" speed was zero, but the Sun is northbound at about 1 knot this time of year.
I was able to shoot the Moon and Venus, too, so there were ample opportunities to get a celestial fix today. The weather was chilly and blustery. Great waves! See photos.
Frank Reed
