NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
DM15 (HP-15c) as NA for Sun
From: Michael Josefsson
Date: 2023 Oct 11, 11:35 -0700
From: Michael Josefsson
Date: 2023 Oct 11, 11:35 -0700
For some time I have used my Swissmicros DM15 (HP-15c clone with more memory) to calculate sun GHA/Decl or Alt/Az. The program does Keplerian motion only, but still has a accuracy of within 1' or so.
This is a very old project of mine that was revived when I found the Swissmicro DM15 as my original HP-15c was crushed in my backpack years ago. So the dormant project took a new start and with a few more program lines than the original I find it useful (and a companion to my A-12 Bubble Sextant).
I have attached the manual here and the really interested parties can find both program listing and manual at the github page https://github.com/jabcam/DM15_astro
