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: Dip uncertainty
    From: Frank Reed CT
    Date: 2004 Dec 8, 15:55 EST
    Alex, you wrote:
    "Maybe. The problem is whether it is possible to
    predict refraction precisely if the temperature
    (presure, humidity etc. what else?) profiles
    are known. Then the problem splits into two:
    to do such prediction mathematically, and to see
    how these profiles may vary. Both parts seem to be
    solvable."
     
    The physics of refraction in air is straight-forward. Creating density profiles is also no problem. Integrating the equations numerically is no problem. But it's not science... UNLESS someone can produce a reasonable set of observational data to compare against.
     
    Frank R
    [ ] Mystic, Connecticut
    [X] Chicago, Illinois
       
    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