Greg Roberts wrote: > 2nd pass: > > USA 129 prediction: 21h03m47s UT az 228.0 el 22.4 --- nil seen > 1st boost orbit 21h08m37s UT az 228 el 20 --- nil seen > 2nd boost orbit 21h12m26s UT az 228 el 18.5 > > I observed az 228.0 el 22.4 from 20h59m35s to 21h11m35s UT and saw > nothing. > > So again not too conclusive - nothing seen in 1st boost orbit but did > not wait long enough for boost orbit #2, but, as in first pass, boost orbit #2 > would have probably been outside the field of view as well. > > Boost orbit #3 was a long way away from either so obviously not looked for or > seen. > > So, at the moment it looks like USA 129 not in original orbit, nor possibly in > boost orbit no 1 - so possibily still in boost orbit #2 or #3 not observed > which I will do tonight if clear. Thank you, Greg. Your 2nd pass is especially helpful in narrowing the re-boost time period. I am not surprised that the 70001 TLE can be excluded, because it almost certainly defines the extreme earliest boost time. I offer the appended revised set of search TLEs that better bracket the likely range after allowing for your information. Note that I have included boosts at apogee as well as perigee, since the predicted tracks can differ considerably, especially if observing at high elevation. They will diverge more with passage of time from epoch. Note also that there is some uncertainty in the pre-boost position, which results in some uncertainty in the search TLE mean motion; therefore, I recommend beginning a search session 1 or 2 min. earlier than predicted by 71001. Good luck, Greg. Ted Molczan Boost at 11:30:49 UTC perigee 307 X 755 km 1 71001U 14027.77763757 .00015429 00000-0 24929-3 0 05 2 71001 97.5750 83.3491 0324389 181.9039 178.0984 15.10755478 02 Boost at 12:18:25 UTC apogee 320 X 743 km 1 71002U 14027.77759560 .00013195 00000-0 24929-3 0 01 2 71002 97.5502 83.3481 0306044 181.9041 178.1052 15.10684931 00 Boost at 14:41:10 UTC perigee 307 X 765 km 1 71003U 96072A 14027.77759665 .00015236 00000-0 24929-3 0 00 2 71003 97.6010 83.3488 0331523 181.9041 178.0954 15.09086608 08 Boost at 15:28:45 UTC apogee 330 X 743 km 1 71004U 14027.77751953 .00011533 00000-0 24929-3 0 05 2 71004 97.5549 83.3480 0298105 181.9043 178.1078 15.08941379 09 Boost at 17:51:29 UTC perigee 307 X 814 km 1 71005U 14027.77739930 .00014397 00000-0 24929-3 0 08 2 71005 97.7244 83.3468 0365735 181.9048 178.0810 15.01092252 02 Boost at 18:39:04 UTC apogee 384 X 743 km 1 71006U 14027.77713777 .00006409 00000-0 24929-3 0 05 2 71006 97.5782 83.3478 0258494 181.9056 178.1209 15.00252234 01 _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Sun Feb 02 2014 - 15:45:50 UTC
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