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
    or...
       
    Reply
    Re: formula for refraction
    From: Frank Reed CT
    Date: 2007 Mar 21, 20:47 -0700

    Alex, you asked originally:
    "What is the exact formula for refraction (for stars)
    used in the Almanac?"
    
    Just to make sure it's not an issue, the formula quoted in the
    explanation in the Nautical Almanac (the one that's been posted here)
    is not used in the creation of the table in the front of the almanac.
    That formula in the explanation is included for folks using handheld
    calculators. It's a convenient approximate formula, good enough for
    most practical work.
    
    -FER
    
    
    --~--~---------~--~----~------------~-------~--~----~
    To post to this group, send email to NavList@fer3.com
    To unsubscribe, send email to NavList-unsubscribe@fer3.com
    -~----------~----~----~----~------~----~------~--~---
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

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

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

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

    Email Settings

    Posting 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