RE: Lacrosse 5 maneuvered

From: Ted Molczan (seesat@rogers.com)
Date: Sun Mar 05 2006 - 10:22:36 EST

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    Scott Campbell wrote:
    
    > Several new obs from last night seem to support a maneuver.
    > 
    > Lacrosse 5 
    > 1 28646U 05016A   06064.04580047 -.00000031  00000-0 -73315-5 0    05
    > 2 28646  57.0163  56.5788 0008477  12.1634 347.9827 14.53345083    08
    
    Apparently, it manoeuvred very slightly lower sometime between Feb 23 and Mar
    03:
    
    Lacrosse 5      15.0  4.0  0.0  2.5 v
    1 28646U 05016A   06064.04579298 -.00000078  00000-0 -18589-4 0    03
    2 28646  57.0134  56.5747 0006964  32.2334 327.9104 14.53344666    02
    Arc 2006 Mar 03.06 - 05.06, WRMS residuals = 0.015 deg
    
    1 28646U 05016A   06054.69099923 -.00000078  00000-0 -18589-4 0    05
    2 28646  57.0134  91.5591 0004657  22.0551 338.0662 14.53342475    01
    Arc 2006 Jan 29.25 - Feb 23.75, WRMS residuals = 0.016 deg
    
    I tried analyzing the combination of both arcs, but they proved inconsistent.
    
    In the 06064.04579298 elset, inclination and rate of decay have been held
    constant at the values of the pre-manoeuvre elset, pending further observations.
    
    This new result refutes my day 06063 solutions, based on only a one day arc,
    which indicated a 50 deg decrease in argument of perigee, as reported at the URL
    below. It now appears not to have changed significantly; therefore, I have
    deleted my day 06063 solutions from my database.
    
    http://satobs.org/seesat/Mar-2006/0032.html
    
    Ted Molczan
    
    
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