NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Ron Jones
Date: 2017 Nov 3, 12:41 -0700
Dear Antoine
You are corect all the altitudes (Hc) are geocentric and were calculated by the "Nav Bodies" worksheet contained in my Celestial Navigator Excel workbook which can be downloaded from the USPS District 16 web site https://www.uspsd16.org
From the "Dept. Info" dropdown menu select "Educational" and under "Quizzes | Workbooks | Software" select "Celestial Navigation". See the attached PDF "Overview of Celestial Navigation an Excel Workbook" for a list of the 30 worksheets contained in the workbook. The attached PDF "Shight Planning Worksheet" is an example from May 2003 used for sight planning at Ediz Hook. The worksheet "Fix Sans DR" can be used to calculate a fix from the intersections of circles of equal altitude.
Ron
