Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    Re: Calculating the time when GHA is equals zero?
    From: Tony Oz
    Date: 2020 Mar 13, 12:37 -0700

    Dear Steve, thank you for your trust in me!

    I'm not an authoritative source on CN, I'm just an enthusiast and a student of it.

    What I know for sure - all the data in an almanac is intended to be used for the linear interpolation of the values between the tabulated ones. The "method" I used to solve your question is just one of many available ways. It is easier if you have a pocket calculator but also doable with a pencil and paper.

    To tell you more about the other - "the official" - way, involving the v and d coefficients I must be sure we are looking at the same Almanac. Is this one what you use? I prefer the other brand of almanacs.

    I will be glad to answer any your question - it helps me to see CN problems more clear. :)

    Warm regards,
    Tony
    60°N 30°E

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.
    Email:

    Email Settings

    NavList ID Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site