A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Lars Bergman
Date: 2018 Nov 7, 06:53 -0800
"We know the rate of change of a lunar in almost every case. You use that for the slope and, if you really want a line to compare against (why?), you find the best line fit by sliding the line with the right slope up and down (only one free parameter), ..."
How do you know the expected rate of change of a lunar distance versus time, if not derived from the observed data?
Lars, 59°N 18°E