Brad Young has provided the raw data of his observations of Sep 07 UTC, which lead me to believe that he most likely did observe the aftermath of new manoeuvre. It appears to have occurred on Sep 07, near the apogee of 01:57:46 UTC. Since Brad observed not long after the manoeuvre, the arc was too short for a normal orbit analysis (a synthetic obs at the point of the burn did not help much), so I experimented and found that a burn simlar to those of the four Segment 1 burns replicated Brad's obs with reasonable accuracy: Segment 2 Burn 1 estimate 1164 X 49994 km 1 70002U 10250.08178243 .00000000 00000-0 00000-0 0 03 2 70002 19.9600 304.5991 7640000 190.5461 180.0000 1.52000000 07 In case I am totally wrong, and there was no burn, it would make sense to also plot positions using the pre-manoeuvre elements: AEHF 1 982 X 49981 km 1 36868U 10039A 10249.33837301 .00000000 00000-0 00000-0 0 01 2 36868 20.3621 304.7527 7689695 190.1772 131.5855 1.52695840 00 Arc 20100905.22-0906.85 WRMS resid 0.012 totl 0.007 xtrk If the manoeuvre occurred, then it should be in the 70002 orbit, trailing the 36868 orbit by several minutes. Ted Molczan _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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