Re: Orbcomm satellite transiting the moon

From: GlocalNet (bg_26934@glocalnet.net)
Date: Thu Jan 25 2007 - 19:33:16 EST

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    William Cooke of NASA, and Thomas Dorman, informed me that the video was
    taken from Huntsville, not Houston as I guessed.
    
     It is quite amazing and unusual that I happened to find the same
    satellite transit in an "aritrary" location 1000 km away!
    The footprint of the transit was an ellipse about 16x58 km in Houston,
    14x40 km in Huntsville, pointing towards the Moon.
    I estimate that the transit path width was about 30 km, and it managed to
    touch the NW sector of both cities!
    
    > I computed a few points along the centerline, put them into a SkyMap .pnt
    > file, and made an inverted geocentric plot of the OrbComm F8 track and
    > the lunar transit path.
    > Houston and Huntsville have been marked by small rectangles (centered on
    > the coordinates given by SkyMap.cty), touching the computed centerline.
    >
    > I also made a 3D (cross-eyed vision) pair from 2000 km altitude - however
    > I didn't select the second "location" carefully, so the result is not so
    > good.
    >
    
    The images are available on http://web.comhem.se/bg_26934/jpg/
    along with a section on a night of photographing flaring geosats
    (under construction)
    
    /Björn
    
    
    
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