Re: USA 129 and 144 elements; manoeuvre alert continues

From: Bjorn Gimle (b.gimle@chello.se)
Date: Tue Jan 07 2003 - 14:11:08 EST

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    According to current elsets USA 129 is well placed within the operational
    constraints on pass time, now being 2h 22 m before USA 161 on the daytime
    pass.
    
    By coincidence (?) this reaches 2:48 on Jan.22 (2:45 on Jan.21). If USA 129
    is apogee-raised one of those days, USA 161 would probably be raised on the
    same date to an MM 0.025 higher than USA 129's to put the next reboost as
    far into the future as possible.
    
    If the maneouvre is earlier, the difference should be smaller but in the
    same direction, and the raise of USA 161 can be postponed for the same
    effect - e.g. 1.5 days around Jan.12 to let the time separation grow to the
    maximum amount.
    
    /Björn
    
    
    > Arc 2002 Dec 25 - 2003 Jan 07 UTC:
    >
    > USA 129         15.0  3.0  0.0  5.3 v
    > 1 24680U 96072A   03007.58006564  .00030323  00000-0  33622-3 0    01
    > 2 24680  97.8503  73.0085 0494505 172.7327 188.1417 14.83520696    07
    >
    > WRMS error = 0.009 deg
    >
    > The object's perigee-crossing of the equator has passed without a
    manoeuvre. It may be that one of the two eastern-plane satellites
    > will set the manoeuvre date. 95066A / 23728's perigee will cross the
    equator on 2003 Jan 12 UTC; 01044A / 26934 will do likewise on
    > 2003 Jan 22 UTC.
    >
    > By the end of January, 96072A's mean motion will have exceeded the highest
    value in its history, so a manoeuvre is virtually certain
    > this month.
    
    
    
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