NROL-27 / USA 227 elements

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Sat Apr 09 2011 - 14:10:01 UTC

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    Peter Wakelin has reported our first visual observations of USA 227, the payload of the recent NROL-27 launch:
    
    http://satobs.org/seesat/Apr-2011/0065.html
    
    http://satobs.org/seesat/Apr-2011/0087.html
    
    His observations yield the following orbit, which was inclined 4.9 deg and synchronous, located at 30.4 W.
    
    USA 227                                              35783 X 35792 km
    1 37377U 11011A   11098.49400289  .00000000  00000-0  00000-0 0    09
    2 37377   4.9282 343.9854 0001062  16.7568 343.0870  1.00272116    07
    Arc 20110406.83-0409.06 WRMS resid 0.004 totl 0.003 xtrk
    
    One of our radio colleagues has reported VHF signals, which appeared to have been emitted by this object, and are
    consistent with an SDS (Satellite Data System) satellite. Its location is 20 deg west of one of the two the
    long-established SDS GEO slots, 10 W, currently occupied by SDS 3-1:
    
    SDS 3-1                                              35743 X 35834 km
    1 26635U 00080A   11095.62684684  .00000000  00000-0  00000-0 0    03
    2 26635   4.3564  49.0487 0010782  46.0689 314.0432  1.00270000    06
    
    Whether US 227 is an SDS 3, or the first of a 4th generation has yet to be determined.
    
    Ted Molczan
    
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