A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Ron Jones
Date: 2018 Oct 13, 09:00 -0700
"In practice and from your own experience how does your 2nd order regression perform since you seem to be using the ( 2) 2nd order coefficient directly derived from the data set and not precomputed from the Observer's (approximate) environment ? (RE: Linear-regression-other-tools-Couëtte-oct-2018-g43055)
In other words, does your 2nd order regression bring a definite practical advantage over the 1st order [linear] one ?"
For a string of sights taken near meridian transit (+/- 10 minutes) the second order regression may provide a better result. For a string of sights taken over a short time before & after meridian transit use the Meridian Transit worksheet which uses second order regression; and calculates the time and sextant altitude associated with meridian transit (see attached PDF)
Ron ..... 48 N 123 W