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

From: Ralf Vandebergh (ralf.vandebergh@home.nl)
Date: Mon Apr 19 2010 - 13:07:13 UTC

  • Next message: Ted Molczan: "RE: [ISStracking] STS-131_2010/04/18_obs_additional"

    Don't think so that it is noise or artefacts. As you see is the outer edge
    of the shuttle pretty smooth.
    And you can easily see the cockpit which indicates the detail level.
    There are a lot of reflections in the region of the payload bay and the
    orbiter boom sensor etc.
    certainly, seeing can deform the detail a little, but I'm sure its real
    detail.
    
    I will post a more extended 'tutorial' processing later, but please be a
    little patient.
    thanks,
    Ralf
    
    ----- Original Message -----
    From: "Thierry Legault" <legault@astrophoto.fr>
    To: "Ralf Vandebergh" <ralf.vandebergh@home.nl>;
    <internationalspacestation@yahoogroups.com>; <seesat-l@satobs.org>;
    <ISStracking@yahoogroups.com>
    Sent: Monday, April 19, 2010 2:47 PM
    Subject: 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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