Updated elements

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Fri May 15 2009 - 16:21:34 UTC

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    Derek Breit, David Brierley, Scott Campbell, Russell Eberst, Peter Gertson,
    Marco Langbroek, Pierre Neirinck, Alberto Rango, Mike Waterman, Brad Young, and
    I, contributed observations used to determine one or more of the following
    element sets.
    
    USA 129                                                  294 X 937 km
    1 24680U 96072A   09135.13617673  .00004999  00000-0  80950-4 0    06
    2 24680  97.8304 188.4888 0459576 190.4088 168.7361 14.83448055    08
    Arc 20090508.81-0515.14 WRMS resid 0.018 totl 0.010 xtrk
    
    USA 161                                                  309 X 958 km
    1 26934U 01044A   09132.00773385  .00003892  00000-0  79793-4 0    05
    2 26934  97.9150 243.7735 0463015 108.8612 256.3388 14.77709242    01
    Arc 20090429.02-0512.02 WRMS resid 0.079 totl 0.019 xtrk
    
    USA 186                                                 258 X 1010 km
    1 28888U 05042A   09135.15443939  .00004448  00000-0  41391-4 0    06
    2 28888  97.9110 198.6063 0536843 271.0869  82.8912 14.77579798    02
    Arc 20090505.82-0515.16 WRMS resid 0.018 totl 0.007 xtrk
    
    STSS-ATRR r                                              163 X 843 km
    1 34904U 09023B   09135.19289149  .00399023  00000-0  25458-3 0    01
    2 34904 112.5416 242.9125 0494297 298.7037  56.5287 15.20432091    08
    Arc 20090512.11-0515.2 WRMS resid 0.061 totl 0.011 xtrk
    
    David Brierley has brought to my attention that the recent manoeuvres by 91076C
    and D, and 96029C and E, model rather well as pseudo orbital decay. My analysis
    confirms the pseudo decay value that David found:
    
    NOSS 2-2 (C)                                            736 X 1476 km
    1 21799U 91076C   09132.93324192  .00000386  00000-0  34093-3 0    01
    2 21799  63.4188 138.4881 0494876   4.0044 356.4718 13.40591606    02
    Arc 20090420.04-0511.09 WRMS resid 0.064 totl 0.019 xtrk
    
    NOSS 2-3 (C)                                            849 X 1364 km
    1 23908U 96029C   09132.97325586  .00000360  00000-0  46290-3 0    04
    2 23908  63.4113  62.5186 0344026 359.7371   0.3420 13.40555622    06
    Arc 20090419.18-05121 WRMS resid 0.027 totl 0.011 xtrk
    
    91076C apparently has also increased its inclination in the process. I am not
    certain what to make of the manoeuvres. Perhaps the NOSS 2 pairs are being
    relocated in relation to the NOSS 3 pairs that replaced them. If so, then they
    could be expected to eventually make breaking manoeuvres to match the current
    operational NOSS mean-motion, near 13.40537 rev/d.
    
    Ted Molczan
    
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