Welcome to the NavList Message Boards.


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

Compose Your Message

Add Images & Files
    Windows astronomy DLL SofaJpl 2.0 released
    From: Paul Hirose
    Date: 2015 Oct 05, 14:50 -0700

    If you program in Windows, the latest release of my SofaJpl fundamental
    astronomy DLL may be of interest. Unlike the previous version, it is
    compatible with Windows 8.
    To help you get started, I include a demonstration program. Source code
    in C++, C#, and Visual Basic is on my site. The program is a console
    application which makes typical calls to the SofaJpl DLL. To keep it
    simple, the program does not interact with the user. To change the time,
    for example, you have to modify the source code.
    Despite the rudimentary user interface, the program's calculations are
    accurate. I'm confident it will compare well with USNO MICA, JPL
    HORIZONS and The Astronomical Almanac.
    A lunar distance computation is included in the demonstration. In
    addition to the separation angle, position angles and phase angle are
    displayed. With those data you can visualize the geometry (sextant
    orientation, direction of illumination, and Moon phase) for any lunar,
    past or future.
    Not every refinement is applied. For example, SofaJpl is able to
    calculate the refracted semidiameter of a body, but I omit that
    correction for the sake of simplicity.

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    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 Settings

    Posting Code:

    Custom Index

    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