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
    Name or NavList Code:
    Email:
       
    Reply
    Re: Position fix by satellite observation
    From: Richard Easton
    Date: 2023 May 28, 19:31 -0700

    Sputnik 1 was launched on Friday October 4th. The following Monday, Gueir and Weiffenbach tracked it by measuring the Doppler shift. On March 17th, 1958, their boss Frank McClure asked if they could trurn this into a Navsat.  The result was Transit. That coincidentally was ther day my father's Vanguard 1 satellite was launched. I exchanged several emails with Bill Guier in 2008 when I was researching GPS Declassified.

    Here are clips from the Vanguard 1 50th in 2008 where Marty Votaw talks about the response to Sputnik 1. Sputnik transmitted at 20 and 40 MHz whereas Minitrack was designed to detect the IGY specified 108 MHz. https://www.youtube.com/watch?v=HS72o86aeZo&t=3s. I recently talked about this. https://player.fm/series/space-and-things/stp133-unsung-heroes-roger-easton-the-man-behind-vanguard-1-and-gps-with-richard-easton

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.
    Email:

    Email Settings

    NavList ID 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