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: running fix + lunar
    From: Andrés Ruiz
    Date: 2010 Nov 23, 12:11 +0100

    For the altitude, an analytical expression of the partial derivatives can be obtained:
    sin H = sin Dec sin B + cos Dec cos B cos(GHA+L)
    dH = ∂H/∂B dB + ∂H/∂L dL + ∂H/∂t dt
    dH = Ho - H = Ho - asin( sin Dec sin B + cos Dec cos B cos(GHA+L) )
    cos H ∂H/∂B = sin Dec cos B - cos Dec sin B cos(GHA+L)
    cos H ∂H/∂L = - cos Dec cos B sin(GHA+L)
          ∂H/∂t = (Hi+1 - Hi)/(ti+1 - ti)
    
    regards
    --
    Andrés Ruiz
    Navigational Algorithms
    http://sites.google.com/site/navigationalalgorithms/ 
    
    
    
    

       
    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