Re: Orbital surveillance satellites now exceed 1 inch resolution?

From: John Locker (john@satcom.freeserve.co.uk)
Date: Fri May 04 2007 - 09:46:13 EDT

  • Next message: Kevin Fetter: "message on spacetrack"

    Yeh,...but where are the pictures Allen.... ?
    
    There are a few on FAS , but they dont show any more detail than a simple 
    hand tracking image.
    
    Without many many frames from say a ten second period its virtually 
    impossible to get more than an "idea" of the shape of a bird....plus of 
    course
    there are the problems of atmospheric conditions and cloud cover :O)
    
    If you look at .... 
    http://mysite.wanadoo-members.co.uk/satcom_transits/resursa.jpg     its a 
    fair representation
    of Resurs ( http://mysite.wanadoo-members.co.uk/satcom_transits/resursd.jpg 
    ...... that is  made up of three consecutive frames , stacked.
    
    ..........but resurs is a fairly basic platform.
    
    The problem with the more interesting sats is that they appear to be much 
    more complex in design.
    
    Mike Tyrrell  and Phil Masding have been using their own tracking sw for 
    some time and have managed to grab some very interesting images using a 10 
    inch scope , but good as they are , they dont reveal enough detail to allow 
    a definitive profile.
    Ideally we need a number of closely located imagers to track  the target 
    bird on the same pass , that way it might be possible to build up a more 
    reliable picture.
    
    > Probably further discussion should be off list.
    
    Agreed.....  :O)
    
    John
    
    
    ----- Original Message ----- 
    From: "Allen Thomson" <thomsona@flash.net>
    To: <SeeSat-L@satobs.org>
    Sent: Friday, May 04, 2007 2:26 PM
    Subject: Re: Orbital surveillance satellites now exceed 1 inch resolution?
    
    
    >
    > --- John Locker <john@satcom.freeserve.co.uk> wrote:
    >
    >
    >> Its no problem with a target that just sits there and doesnt
    >> move.......but if you can come up with a tracking programme that
    >> will give me a zillion frames of a fast moving satellite....the
    >> aspect of which is changing constantly , not to mention the shadow
    >> effect from its solar panels.................and I'll buy it !
    >
    > But the lucky exposure technique and a variant that works with image
    > segments has been successfully used to image satellites since the
    > middle of the 1990s, notably by Ron Dantowitz and Marek Kozubal (both
    > of whom used to post here).
    >
    > Of relevance to Lacrosse, see Dantowitz' article in the August 1998
    > issue of Sky & Telescope and
    > http://www.satobs.org/seesat/Aug-1996/0064.html
    >
    > Probably further discussion should be off list.
    >
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