NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Mer-pass vs Upper Culmination
From: Tony Oz
Date: 2017 Oct 22, 08:47 -0700
From: Tony Oz
Date: 2017 Oct 22, 08:47 -0700
Hello!
The sunrise/sunset table from The Raft Book made me think if the Sun's meridian passage and its upper culmination are the same event. I think there are seasons when the mer-pass is different from the culmination: the equinoxes. May be I'm wrong but an observer is only able to accurately measure the altitude (rather than the azimuth), so the time of the mer-pass proper is only available by SR. Unless it were solstices. I think to build a sunset/sunrise table for emergency navigation purposes that will include all the times and azimuth angles, and also list the moments of mer-pass and culminations. Please comment.
Regards,
Tony
