A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Antoine Couëtte
Date: 2015 Feb 28, 04:31 -0800
I earlier simply stated that if the Pyramid shown in post g30486 is thought or "advertised" as being a Pyramid with vertices "", then it is a misleading statement.
Let's review the terms definition first:
Pole: is self-explanatory,
GP : this the
Center: self explanatory
The Pyramid actually shown in post g30486 is bigger than any "" Pyramid because Pyramid in post g30486 shows up the Local Hour angle Value in a plan (necessarily parallel to the equator) which is totally outside the Earth Sphere (except at the Pole itself). Accordingly under any case both the Observer's position and the shown in post g30486 is "advertised" as being a Pyramid with vertices "", then it is a misleading statement.
Have a look at the 2 .pdf documnts and the 15 following up pictures which are published in chronological order.
The CelNav computations Pyramid we are interested in the Green edged one, i.e. outside the hand shadowed areas. Look at it before starting cutting and pasting. This green edged Pyramid has the following limits (or vertices): Pole, Earth Center, Observer's Postion and I had to slightly modify my first published drawing in order to make the green edged pyramid consistent with this definition. (However this small modification does not change at all the overall shape of the paper construction. The only difference is that from the star position, the green line now goes towars the Pole itself and not directly towards the
Hopefully no longer clear as mud ... :-)
Best Friendly Regards