Björn Gimle wrote:
> (MM=14.71972546); just ~0.10 early on Ted's
> 1 70000U 04240.85818665 .00014500 00000-0 19570-3 0 02
> 2 70000 98.0110 301.1946 0530000 24.6838 337.8764 14.71992008 00
> which puts the time of manoeuvre at 2004 Aug 26 16:58:58 UTC
I regret that I worded the quoted message poorly. The above elset corresponds
with the rev-earlier perigee passage, 2004 Aug 26 UTC: 15:21:17 UTC.
Updating my analysis to the ascending node prior to Bjorn's obs of Aug 28 UTC
yields:
USA 129 15.0 3.0 0.0 5.3 v
1 24680U 96072A 04241.80979169 .00012847 00000-0 17584-3 0 07
2 24680 98.0117 302.1349 0529962 21.6398 340.6321 14.72016519 07
Arc 2004 Aug 26.64 - 28.82, WRMS residuals = 0.029 deg
Note that in order to help constrain the solution to yield realistic results, I
began the arc at the moment of the perigee passage of the manoeuvre, using an
estimated observation derived from the final pre-manoeuvre elset, looking
straight up from the sub-satellite point beneath perigee: 29.898 S, 89.836 E, 0
m:
24680 96 072A 0000 G 20040826152117000 17 25 1941324+295320 00 S
I will abandon this estimated observation when the duration of the arc of
post-manoeuvre obs grows sufficiently long to yield a reliable solution
unassisted.
Here is the updated summary of all of the USA 129 (96072A / 24680) reboosts
during the life of USA 164 (01044A / 26943), for which I have orbital elements:
01044A lag
96072A boost UTC Lat h:mm:ss
--------------------------- ----------
2002 Apr 04 16:27 00.17 S +2:41:41
2002 Jun 27 15:09 81.45 N +2:40:31
2002 Sep 12 16:35 14.52 S +2:45:44
2003 Jan 17 14:03 39.72 N +2:39:00
2003 Mar 27 15:46 81.39 S +2:46:00
2003 Jun 05 18:44 42.13 N +2:40:39
2003 Aug 07 13:58 16.61 S +2:37:09
2003 Oct 16 14:33 31.89 S +2:48:44
2003 Dec 18 12:54 57.99 N +2:42:16
2004 Feb 12 17:34 60.42 N +2:44:06
2004 Mar 18 17:43 06.00 S +2:42:31
2004 Mar 23 14:16 09.74 N +2:42:16
2004 Jun 17 13:55 72.28 S +2:46:57
2004 Aug 26 15:21 29.90 N +2:40:19
The reboost times ranged between 12:54 and 18:44 UTC, about a 6 hour span. It
may be a meaningless coincidence, but taking into account daylight saving time,
they fit within the local hours of 07:00 to 15:00, of North America's eastern
time zone.
Ted Molczan
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