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
    Round-off in lunars
    From: Peter Hakel
    Date: 2009 Jun 7, 21:18 -0700
    Figure 8.5 on p. 93 in John Karl's book "Celestial Navigation in the GPS Age" displays a lunar-distance worksheet that ends with the UT result of 21h 18m 59m. My lunar_distance.xls spreadsheet calculates 21h 18m 55s from the same input data.  I discussed this with John off the list and we observed that the 4-second difference arises from rounding the lunar distances to the nearest 0.1' in the book while the spreadsheet maintains all digits until the very end.  We also agreed that this difference is insignificant given the precision one might realistically expect from this method.

    On another note, the Moon GHA should be 79 degrees instead of 78. This is just a misprint because the rest of the worksheet data are unaffected.


    Peter Hakel



    --~--~---------~--~----~------------~-------~--~----~
    Navigation List archive: www.fer3.com/arc
    To post, email NavList@fer3.com
    To unsubscribe, email 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