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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: I and C pages of the NA
From: Gary LaPook
Date: 2014 Sep 26, 09:41 -0700
From: Dale Lichtblau <NoReply_Lichtblau@fer3.com>
To: garylapook@pacbell.net
Sent: Friday, September 26, 2014 2:36 PM
Subject: [NavList] Re: I and C pages of the NA
From: Gary LaPook
Date: 2014 Sep 26, 09:41 -0700
"Corr..n" is just and abbreviation for "correction."
The "d" is merely the difference between consecutive hourly declinations for the sun, moon, and planets. The i& c is simply a multiplication table for multiplying the hourly "d" and "v" corrections
for the minutes in the intervening period since the prior hourly tabulated declination and "variation" from the assumed 15° 00' increment per hour for the sun, planets and the assumed 14° 19' increment per hour for the moon since the movements of these bodies is not constant like the sun and aries.
gl
From: Dale Lichtblau <NoReply_Lichtblau@fer3.com>
To: garylapook@pacbell.net
Sent: Friday, September 26, 2014 2:36 PM
Subject: [NavList] Re: I and C pages of the NA
Thanks Greg, Gary...
I didn't frame by question very well.
How are the d values at the bottom of the daily pages and the corresponding corrections in the I&C pages calculated/derived? For the sun, they range from 0.0 to 1.0 with the corresponding Dec correction ranging from 0.0 to 0.6. The corresponding corrections range from 0.0 (beginning on June 18 and December 18, 2014) to 1.0 (September 10 and March 2). (In an old post, someone used the phrase "just a multiplication table." ? )
(By the way, what's the significance of the superscript n on "Corr"?)
Thanks, Dale
