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
    Name or NavList Code:
    Re: Cel nav in space
    From: Frank Reed CT
    Date: 2005 Jan 5, 18:32 EST
    Derrick, you wrote:
    "You are correct in
    the statement about the intentional steering being done to gain the
    additional rotational speed - but not from the Cape - if you have ever
    noticed, the shuttle launches from the Cape are mainly (not always) low
    altitude missions.  When they want the shuttle to go into a higher
    orbit, with minimal additional fuel expenditure, they launch from
    Vandenburg AFB in California.  Launching from California allows the
    shuttle to launch in a westerly direction - there by taking advantage of
    the earth's rotation. This results in a higher orbit for less fuel."
    Derrick, your earlier post made good sense, but this latest addition is way off. First, they do launch east to get the rotation kick, and that *is* why they launch eastward from almost every launch site on Earth. Second, no shuttles were ever launched from Vandenberg (despite ill-considered plans to do so before 1986), though many unmanned rockets launch from there. The reason they use that launch site is because they can shoot due south (there's a lot of ocean south of southern California) which is ideal for polar orbits.

    "When launching from the Cape, part of the intentional turn east is to
    avoid over flights of Cuba - by turning east, they are actually burning
    more fuel than needed - but then they don't have to deal with the
    political ramifications."
    Certain launch windows are avoided because of overflight issues (safety is as much of an issue as politics) but it is not more expensive to launch eastbound --it's less expensive. You get a roughly 900mph headstart towards orbit by shooting east. Note that there is a considerable extra expense for the US in building the International Space Station
    42.0N 87.7W, or 41.4N 72.1W.
    Browse Files

    Drop Files


    What is NavList?

    Get a NavList ID Code

    (please, no nicknames or handles)
    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 Settings

    NavList ID 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