STS-133 EVA-2 post-culmination image

From: Ralf Vandebergh (
Date: Wed Apr 27 2011 - 11:17:33 UTC

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    A belated STS-133 image taken during the second and last EVA of the mission. All other images I posted earlier of
    this session were taken before culmination. This is a post-culmination image and we see clearly the 2 booms of
    the Shuttle Robotic arm SRMS which are only 33 centimeters in diameter. On the other side we see a part of the 
    Station Robotic Arm SSRMS with at the end spacewalking astronaut Steve Bowen but now seen from an different angle
    then in the earlier images.  
    We see the astronaut from this angle (with the Shuttle seen from its back) almost  of the front side. See simulation on page:
    Also included is a raw frame because this was a rare good one. Generally the seeing on this location doesn’t allow
    this quality and only parts of frames can be really sharp. In those cases, frames are selected on the parts which 
    show the useful details. With this information it is easy to understand that, aside from differences between frames
    caused by the fast angular speed, it is not recommendable to stack limited numbers of frames when only parts are
    sharp. The detail in the resulting image would be washed out. Only in very good seeing conditions this works out well.
    In planetary imaging, were large numbers of frames (hundreds or thousands) are combined, the technique is much
    more effective to get a useful average for sharpening.
    Best regards,
    Ralf Vandebergh
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