Re: [International Space Station] Re: [ISStracking] STS-131_2010/04/18_obs

From: Thierry Legault (legault@astrophoto.fr)
Date: Mon Apr 19 2010 - 12:47:22 UTC

  • Next message: Ralf Vandebergh: "Re: [International Space Station] Re: [ISStracking] STS-131_2010/04/18_obs"

    Ralf, you do not understand what I mean. I have no
    problem with orientation, it's obvious that the orbiter
    is seen from the top, the inside of the payload bay
    toward us (it's all the more obvious that I also have
    taken images -to come- of this passage).
    What I mean is that I see in your images a lot
    of distortions, bright dots and features that do not
    seem to correspond to something real. For example,
    the left edge of the payload bay should be
    straight, even and colorless, and not like in your
    image distorted and interrupted.
    So, sorry to insist but I really do like to see
    the raw frame and to know what sequence of
    and parameters of processing has been applied
    (I suppose that the image has been
    enlarged -perhaps too much for
    the level of real details- , sharpened
    or smoothed, etc.). I would also like to
    know what camera you have used.
    
    thank you for your understanding Ralf  :-)
    
    
    At 14:03 19/04/2010, Ralf Vandebergh wrote:
    
    >Theirry,
    >
    >What you see as the payload bay, is in fact a lighted part of the 
    >MPLM and structure on the inner side.
    >The port payload bay is in actually only visible partial in front of 
    >the wing, more on the outer side.
    >The starboard payoad by is even fully in shade.
    >
    >Ralf
    >
    >   ----- Original Message -----
    >   From: Thierry Legault
    >   To: internationalspacestation@yahoogroups.com ; seesat-l@satobs.org
    >   Sent: Monday, April 19, 2010 1:58 PM
    >   Subject: [International Space Station] Re: [ISStracking] 
    > STS-131_2010/04/18_obs
    >
    >
    >
    >   hi Ralfn,
    >
    >   looks impressive at first sight. However, as I told you before,
    >   for most of your previous shots of ISS there are things that I
    >   can't explain or relate to existing details, especially all the
    >   irregularities and bright dots that appear here and there.
    >   For example, there is no reason why the left edge of the
    >   payload bay would not look straight and even.
    >   Almost 20 years of imaging of all celestial objects
    >   make me do think to noise, perhaps amplified or
    >   transformed by processing into something that
    >   look like details.
    >
    >   So, to decide, I would really like to:
    >   - know if this is one shot or a combination of several ones
    >   - see the raw image(s)
    >   - know the exact processing that has been applied:
    >   sharpening/smoothing/enlargement etc.
    >
    >   thank you Ralf!
    >
    >   Thierry Legault
    >   www.astrophoto.fr
    >
    >
    >
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    Thierry Legault
    www.astrophoto.fr
    
    
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