The following are based solely on Scott Campbell's observations of 2007 Jun 18
and 19 UTC:
NOSS 3-4 (A) 0.0 0.0 0.0 4.9 v
1 31701U 07027A 07170.06979759 .00000020 00000-0 20000-4 0 06
2 31701 63.3811 37.1588 0232911 148.8868 212.6203 13.65676455 03
Arc 2007 Jun 18.15 - 19.10, WRMS residuals = 0.018 deg
NOSS 3-4 (C) 0.0 0.0 0.0 4.9 v
1 71703U 07027C 07170.06992739 .00000020 00000-0 20000-4 0 05
2 71703 63.3479 37.1783 0231929 151.1831 210.2249 13.65605473 07
Arc 2007 Jun 18.15 - 19.10, WRMS residuals = 0.018 deg
Mike, Scott and I have produced nearly identical results, and further tracking
will not result in large changes to the elements.
These appear to be the main deviations from nominal, resulting from the
anomalous final Centaur burn:
Nominal Achieved
Perigee, km 1000 842
Apogee, km 1200 1186
Arg Perigee, deg 180 150
It will be interesting to see whether the orbit will be corrected using a few
large manoeuvres, or many small ones. Detectable impulsive manoeuvres by NOSS
are very rare, and very small when they do occur, which leads me to suspect that
their manoeuvring engines are small. Do they carry sufficient propellant to
achieve the nominal initial orbit? Time will tell.
Ted Molczan
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