SBIRS GEO 2 pre-launch elements

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Tue Mar 19 2013 - 17:49:09 UTC

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    SBIRS GEO 2 is scheduled for launch from Cape Canaveral on an Atlas V-401, on 2013 Mar 19, between 21:21 UTC and 22:01
    UTC.
    
    http://www.spaceflightnow.com/atlas/av037/status.html
    
    The following elements are of the GTO (geosynchronous transfer orbit), assuming launch at 21:21 UTC. 
    
    SBIRS GEO 2                                            185 X 35775 km
    1 73201U          13079.13634402  .00000000  00000-0  00000-0 0    09
    2 73201  22.1900 319.8541 7305589 178.1087 188.3006  2.28434335    09
    
    I derived them by rotating the post-launch SBIRS GEO 1 TLE reported below to the circumstances of SBIRS GEO 2s' launch,
    and then substituting the inclination reported in the SBIRS GEO 2 press kit.
    
    http://satobs.org/seesat/May-2011/0125.html
    
    The Centaur will trail by a short distance, on a bit different track.
    
    The spacecraft's LAE (liquid apogee engine) will be fired six times over a 9 day period to reach geosynchronous orbit.
    To my knowledge, the initial synchronous longitude has not been announced.
    
    SBIRS GEO 1 reached its checkout location, 96.7 W, within three weeks of launch. It remained there about 4 months, then
    headed west, at the rate of nearly 1 deg/d. It is out of range of hobbyist observers, but via ESA's Classification of
    Geosynchronous Objects Issue 15, ISON reported it synchronous near 94 E, as of 2013 Jan 01.
    
    Ted Molczan
    
    
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