Re: Total confusion about SZ-4 elsets?

From: Alan Pickup (alan@wingar.demon.co.uk)
Date: Tue Dec 31 2002 - 08:28:10 EST

  • Next message: Sven Grahn: "Re: Total confusion about SZ-4 elsets?"

    Sven,
    
    As I mentioned in my earlier post to SeeSat-L, SCC has changed the 
    designations so that Shenzhou 4, which was previously the C object, is 
    now 27630 = A.
    
    In fact, all the C object elsets so far issued, plus the A elsets since 
    epoch 02365.01917697, can be satisfied by a single orbit to better than 
    0.1 second in equator crossing time.
    
    Similarly, all the A elsets up to 02364.70568348 and all the B elsets 
    since then can be satisfied by a single orbital evolution to better than 
    0.2 second. That evolution leads to decay on January 10.
    
    This leaves just four orphan elsets, the earlier ones issued under the B 
    designation:
    
    1 27631U 02061B   02363.99063452 -.00002648  83756-5  00000-0 0    19
    2 27631  42.4166 338.1817 0096007 122.0244 238.9998 16.07463202    45
    
    1 27631U 02061B   02364.29795330  .08819089  86747-5  32762-3 0    63
    2 27631  42.4377 336.1153 0023606 141.5036 214.4799 16.41507587    96
    
    1 27631U 02061B   02364.29867553  .99999999  86250-5  14303-1 0    78
    2 27631  42.3982 336.1522 0029614 151.2781 209.0607 16.36663733    95
    
    1 27631U 02061B   02364.32335142 -.00002781  87973-5  00000-0 0    29
    2 27631  42.4166 336.0438 0096007 124.5196  22.9059 16.29358713    92
    
    The first of these is not dissimilar to that of the rocket at the time 
    but appears to be 58 seconds ahead of the rocket. Was there ever a third 
    object?
    
    Alan
    -- 
    Alan Pickup / COSPAR 2707:  55.8968N   3.1989W   +208m   (WGS84 datum)
    Edinburgh  / SatEvo & elsets:    http://www.wingar.demon.co.uk/satevo/
    Scotland  / Decay Watch: http://www.wingar.demon.co.uk/satevo/dkwatch/
              *
    
    
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