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: Online Extended Precision Calculator
    From: Frank Reed
    Date: 2015 May 2, 12:19 -0700

    Antoine,

    I agree with Robert Bernecky that wolframalpha.com is probably the best place for you to find somewhat exotic calculation tools. Here's a link to his example again.

    But now that you have lots of ideas, I have to ask the big question. You wrote originally:
    "For Navigation purposes I need to transform radians into degrees with at least 16 significant digits (and - better - if possible to 20 or even 24 significant digits)."

    Why? Are you navigating at Angstrom-level precision on the Earth? Measuring the distance from New York to Paris to the nearest atomic diameter? That would require 17 significant digits. Are you navigating across the Milky Way Galaxy at centimeter precision? That would require 24 significant digits. Clearly not... You don't need extended precision for any practical navigation problem, right? You don't even need double precision (16 digits). For normal celestial navigation, if you can convert degrees to radians and back with 7 significant digits, then you've got all the precision you need and some to spare. And that level of precision, of course, is available in nearly every handheld or online calculator.

    Frank Reed

    PS: Yet another way to do math to so-called "double precision" (16 digits --far more than you need) without using an online calculator, even when off-network in the middle of the ocean on any computer or even a smartphone, is to type javascript expressions into your internet browser's address bar. For example, type "javascript:document.write(Math.sin(Math.PI/4))" in your browser's address bar (not in search --you have to type it in the bar at the top where you normally see http: etc.), and it will display the result. It's all boiler-plate except the code inside the parentheses. In other words, if you type javascript:document.write(1), your browser will display the number 1. This isn't really all that practical, but it can be an interesting way to experiment with your browser's capabilities and security features. For example, you have to type "javascript:" manually in most browsers; copy and paste won't work. And it demonstrates that calculation capability is ubiquitous. A modern internet browser is a "Swiss Army knife". It can do anything.

       
    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