Re: Iridium 2 flare

From: satrack@libero.it
Date: Fri Aug 30 2013 - 19:35:20 UTC

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    Hi Jon,
    Regarding your question about the Iridium 2 flare, I think it's improbable that it will pass again with the same orientation, however you can try using the orientation "None" of VSFT-3D. At the flare time click on "Auto Orient Mirror", thenenable "Show Flare/Transit Tracks", the program will keep the same surface orientation with respect to stars.
    
    If you are able to observe 3 reflections from the same surface you can try to compute the rotation axis. You can findinstructions in the help document (section 3.2) included in the program.
    Regards,Simone
    
    
    
    
    
    ----Messaggio originale----
    
    Da: jonmikelk@gmail.com
    
    Data: 30-ago-2013 0.18
    
    A: "Simone Corbellini"<satrack@libero.it>, "Pierre NEIRINCK"<pierre-neirinck@wanadoo.fr>, "C. Bassa"<cgbsat@gmail.com>, <seesat-l@satobs.org>
    
    Ogg: NROL-65 Obs
    
    
    
    39232 13 043A   6242 F 20130829211558520 37 15 2118287+301736 38 S39232 13 043A   6242 F 20130829211611060 18 15 2119214+345335 38 S
    39232 13 043A   6242 F 20130829211619300 17 15 2120031+381526 37 S39232 13 043A   6242 F 20130829211739680 17 15 2142287+711814 17 S
    
    Most accurate point is the last one cause it passed very near of a star. 
    About 3 seconds early. Could be because a not-well sync clock?
    
    MSX obs:23851 96 024A   6242 F 20130829211109810 18 15 1727497+202022 38 S
    23851 96 024A   6242 F 20130829211123350 17 15 1716113+245736 37 SMost accurate the last one too.
    
    
    ----------------Iridium 2 (-) mag -5 flare:
    FPAS12,25527,R6242A,20130829,212412,2s,-,42.9453,-2.82839,623,LUUF,-,10s,6s,-5,inv,G1CkNNN,R,6.2789,70.8351,1,-,-,-,-;
    R6242A201308292124
    This Iridium satellite is out of service, and its reported tumbling. Today i saw a long flare of about 6 seconds, this says me that is not tumbling very fast. The question is: Assuming that if its not tumbling its possible to re-calcule the orientation of the main mission antennas and make predictable?
    
    
    Jon.
    -- 
    Jon Mikel, COSPAR 6242, 42.9453, -2.82839, 623m, Bitoriano, Basque Country.
    
    
    
    
    
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