NROL-20: revised search elements

From: Ted Molczan (seesat@rogers.com)
Date: Wed Oct 19 2005 - 18:06:43 EDT

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    I have re-considered the search orbit in light of the aforementioned relatively
    short impact range of the 1st stage. I believe that indicates a fairly low
    altitude at insertion (SECO), which required a different argument of perigee
    than I used. 
    
    There are two possible solutions for any given altitude at SECO. I believe that
    the argument of perigee of the first elset (137 deg) probably is closest to
    being correct, because it is closest to that of the spacecraft being replaced,
    USA 129 (96072A / 24680), which was at arg perigee 117.4 deg at the time of
    launch.
    
                                                            175 X 1029 km
    1 72001U          05292.75993057  .00807205  00000-0  10000-2 0    01
    2 72001  97.8760 354.5813 0611200 137.5000  23.0000 14.87728598    08
    
                                                            175 X 1029 km
    1 72001U          05292.75993056  .00807205  00000-0  10000-2 0    00
    2 72001  97.8760 354.5813 0611200 189.0000 337.4000 14.87728598    02
    
    The epoch of both is that of SECO, which occurred on 2005 Oct 19 at 18:14:18
    UTC.
    
    Ted Molczan
    
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