On the evenings of Sep 9 and 10 I tried partial and full-orbit scans for USA 129, despite moon, clouds and battery drain. While reducing some of the captured tracks, I realized that with the drag term of the 14114 elset, USA 129 could well have decayed by now. Nevertheless, one of my search elsets matched an track of a LEO sunsynch NB. No match found in Heavensat or SkyMap. In the preparations I also noticed that HS, SM, H-A and Vec2TLE disagreed strongly both in pass times (up to 30 minutes), and the time when I passed through the orbit plane (+- 6 min), despite using the same elset 14114. CalSky was far off, using a 1100+ day old elset (!). Also, a strange "feature" since a few months is that requesting TLEs at CS opens a link to SpaceTrack, though it acknowledges that "orbit source: amateur observations" 74680 96 072A 5919 F 20140910194514000 18 25 1132052+554428 55 S 74680 96 072A 5919 F 20140910194515500 18 25 1125459+545465 55 S 74680 96 072A 5919 F 20140910194522000 18 25 1111170+525503 55 S 74680 96 072A 5919 F 20140910194524500 18 25 1106289+521093 55 S Obs - Pred: 84.250 min X-track; 14.147 s late, relative -0.09 day old elset: Obs - Pred: 78.189 min X-track; 13.636 s late, relative -0.09 day old elset: Obs - Pred: 68.679 min X-track; 14.982 s late, relative -0.09 day old elset: Obs - Pred: 65.980 min X-track; 15.440 s late, relative -0.09 day old elset: USA 129 h1 1 74680U 96072A 14253.91250000 .00077000 00000-0 35722-3 0 18 2 74680 97.5219 315.5038 0240080 97.8837 112.8941 15.71122180 21341 -- ---------------------------------------- Björn Gimle, COSPAR 5919 59.2617 N, 18.6169 E, 51 m Phone: +46 (0)8 571 43 312 Mobile: +46 (0) 704 385 486 _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Fri Sep 12 2014 - 07:01:53 UTC
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