Re: Orbital surveillance satellites now exceed 1 inch resolution?

From: John Locker (john@satcom.freeserve.co.uk)
Date: Thu May 03 2007 - 18:29:35 EDT

  • Next message: Robert Clark: "Re: Orbital surveillance satellites now exceed 1 inch resolution?"

    This method is in regular use for planetary and deep space imaging Allen , 
    and has been for some time.
    There are various bits of software that will do the task of  picking out the 
    best frames , which can then be stacked to form the final image.
    
    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 !
    
    
    Phil and Mike ( list members) have perfected their own software that will 
    track birds accurately , but even that will only give them a max of about 
    20-30 frames which can be stacked ... ie frames that show the satellite in 
    exactly the same attitude/shadow effect........sadly , not a zillion frames 
    :O)
    
    When tracking say ISS by hand...I usually get about 100 useable frames over 
    a two minute period from 2-3000 frames , of which I dump about half , then 
    single out the final few to make up an animation. As you can see from the 
    strip
    http://mysite.wanadoo-members.co.uk/satcom_transits/stationstrip.jpg  the 
    view of the station is constantly changing. throughout the pass.
    
    We are drifting a bit OT here , but in closing , I would suggest the best 
    way to appreciate the problems relating to satellite imaging is to give it a 
    go !
    Wasn't it Mr Chien who labelled it an "Extreme Sport " ?  :O)
    
    John
    
    
    
    
    ----- Original Message ----- 
    From: "Allen Thomson" <thomsona@flash.net>
    To: <SeeSat-L@satobs.org>
    Sent: Thursday, May 03, 2007 10:03 PM
    Subject: Re: Orbital surveillance satellites now exceed 1 inch resolution?
    
    
    >
    > --- John Locker <john@satcom.freeserve.co.uk> wrote:
    >
    >>> If only it was that simple  !!!!   :O)
    >
    > I take it you've tried looking at a zillion frames and encountered
    > problems with getting good ones and combining them into a better image.
    > What goes wrong?
    >
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