USA 129 post-manoeuvre elements

From: Ted Molczan (molczan@rogers.com)
Date: Sat Mar 20 2004 - 11:29:24 EST

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    Observation arc 2004 Mar 18.85 - 19.87 UTC:
    
    USA 129         15.0  3.0  0.0  5.3 v
    1 24680U 96072A   04079.85875819  .00019773  00000-0  26010-3 0    07
    2 24680  97.9724 141.3773 0531839 181.8987 178.0214 14.72375857    09
    
    WRMS residuals = 0.02 deg
    
    The short observation arc to-date suggests that the eccentricity has increased,
    such that the mean perigee height has returned to its value prior to the
    perigee-raising manoeuvre several weeks ago. 
    
    I find it difficult to believe that the operators would have done that, so for
    now I continue to set the eccentricity to conform with my assumption that the
    mean perigee distance has remained unchanged at about 284 km relative Earth's
    mean radius of 6371 km. I suspect that further tracking will reveal the
    eccentricity is between about 0.0531 and 0.0535
    
    I also continue to freeze the B* decay term at its pre-manoeuvre value, until
    the arc grows sufficiently long to determine a reliable value.
    
    I was clouded-out last night, and tonight and tomorrow are unlikely to be
    better.
    
    Ted Molczan
    
    
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