TJM obs of 2005 Feb 25 UTC and NOSS 3-3 elements

From: Ted Molczan (molczan@rogers.com)
Date: Fri Feb 25 2005 - 11:32:07 EST

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    05004C has manoeuvred to a slightly lower orbit. The observed arc is short -
    just one rev - but it suggests that C has nearly matched the mean motion of A,
    temporarily freezing its node crossing lag of A at 47.5 s.
    
    Their next manoeuvres could increase their mean motion to around 13.406 rev/d;
    therefore, until the next observations have been reported, it would be prudent
    to allow for early arrival of 1 min per day since the epoch of the following
    elements:
    
    NOSS 3-3 (A)     0.0  0.0  0.0  4.0 v
    1 28537U 05004A   05056.40614835  .00000011  00000-0  20000-4 0    02
    2 28537  63.4380 106.1211 0124054 180.3170 179.7796 13.39823685    03
    Arc 2005 Feb 13.41 - 25.43, WRMS residuals = 0.017 deg
    
    NOSS 3-3 (C)     0.0  0.0  0.0  4.0 v
    1 28541U 05004C   05056.40669853  .00000011  00000-0  20000-4 0    07
    2 28541  63.4373 106.2541 0124914 179.7003 180.4118 13.39826347    04
    Arc 2005 Feb 25.35 - 25.43, WRMS residuals = 0.011 deg
    
    In the orbit determination of 05004C, I held the inclination and rate of decay
    constant; the resulting elements are realistic, but are subject to improvement
    through additional tracking.
    
    Description of 2-line elements: http://www.satobs.org/element.html
    
    28537 05 004A   2701 G 20050225082516040 17 25 0142094+610344 18 S
    28541 05 004C   2701 G 20050225082604600 17 25 0142140+610459 18 S
    28537 05 004A   2701 G 20050225101800370 17 25 0132022+700705 87 S
    28541 05 004C   2701 G 20050225101843890 17 25 0142648+701313 18 S
    28541 05 004C   2701 G 20050225101848770 17 25 0132022+700705 87 S
    28541 05 004C   2701 G 20050225102005620 17 25 2308977+625005 37 S
    
    What these numbers mean: http://www.satobs.org/position/IODformat.html
    
    Site 2701: 43.68764 N, 79.39243 W, 230 m
    
    Ted Molczan
    
    
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