Re: 2.2' of arc discrepancy between CalSKY and SkyMap ISS tracks

From: Tom Wagner (sciteach@mchsi.com)
Date: Sun Jun 27 2004 - 23:46:48 EDT

  • Next message: Thomas Fly: "Re: 2.2' of arc discrepancy between CalSKY and SkyMap ISS tracks"

    Hello all,
    
    I used TheSky planetarium software to plot the paths corresponding to the
    TLEs and Tomás Maruska's observer information as given in Tom Fly's original
    post.  Using 208 meters elevation (which is actually relative to the WGS84
    ellipsoid), the results can be summarized as follows:
    
    MCC TLE  : track is 1.1  Venus diameters below the center of Venus
    OIG3 TLE : track is 0.77 Venus diameters above the center of Venus
    
    As Tom has indicated, the actual path was about 0.5 Venus diameters below
    Venus' center.
    
    I can email a screen capture from TheSky to anyone that would like to see
    it.
    I am glad to help!!
    
    Tom  Iowa  USA
    +   +   +
    
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