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
    Re: Online sight reduction and a question to Frank
    From: Alexandre Eremenko
    Date: 2012 Mar 19, 21:01 -0400

    Thanks, Gary.
    Very convenient. I had to reduce about 30 sights, see my next message:-)
    On Mon, 19 Mar 2012, Gary LaPook wrote:
    > Try this link:
    > http://aa.usno.navy.mil/data/docs/celnavtable.php
    > gl
    > --- On Mon, 3/19/12, Alexandre Eremenko  wrote:
    > From: Alexandre Eremenko 
    > Subject: [NavList] Online sight reduction and a question to Frank
    > To: NavList---org
    > Date: Monday, March 19, 2012, 3:28 PM
    > 1. Does there exist a free online sight reduction calculator?
    > Of the type Frank has for the Lunars.
    > You input GMT, Long and Lat, and it gives you the Sun altitude.
    > I remember such things existed in the past...2. Question to Frank: I tried 
    to use your calculator for this purpose.
    > It indeed computes the altitude. I input some random Lunar distance,
    > I only need Sun's or Venus's altitude.
    > Is this for the center of the Sun/Venus with no refraction correction?
    > Or what? And is the accuracy of this altitude 0'1 for the present time 
    (2012)?I tried to reduce one or two altitudes manually, the result disagrees
    > with Frank's calculator altitude by few minutes.Alex.
    > ----------------------------------------------------------------
    > NavList message boards and member settings: www.fer3.com/NavList
    > Members may optionally receive posts by email.
    > To cancel email delivery, send a message to NoMail[at]fer3.com
    > ----------------------------------------------------------------
    > View and reply to this message: http://fer3.com/arc/m2.aspx?i=118403

    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