Flares from two antennas occur under not ideal conditions though. Here a typical case: Observer location: 44.09673 N, 10.64507 E IRIDIUM 97+ Flare from the Front Antenna: 07/07/2012 02:55:47 UTC - Flare Mag. -6.2 Satellite Elevation: 21.8 deg. Sun Elevation: -7.5 deg. Flare from the Right Antenna: 07/07/2012 03:00:20 UTC - Flare Mag. -4.8 Satellite Elevation: 9.3 deg. Sun Elevation: -6.8 deg. Visual representation (copy the whole link): http://www.satflare.com/track.php?q=URL&Lat=44.09673382396232&Lon=10. 645071394837373&Alt=100&jd=2456115.6220922223&MapZoom=3&ChartZoom=1&LatMap=44. 09673382396232&LonMap=10. 645071394837373&l0=4952494449554d203937205b2b5d&l1=31203237343530552030323033314120202031323137352e3537383537313736202d2e3030303030303135202030303030302d30202d31323536352d3420302020333136302020&l2=32203237343530202038362e33393237203335392e343538342030303035313032202036382e38373437203239312e323939392031342e3334323134303632353239343231202000 Double flares occur where the flare ground tracks (blue lines) cross each other. Regards, Simone >----Messaggio originale---- >Da: bjorn.gimle@gmail.com >Data: 23-giu-2012 19.50 >A: "Patrice Scattolin"<scattol@videotron.ca> >Cc: <seesat-l@satobs.org> >Ogg: Re: Iridium with multiple flashes. Is that possible > >It is possible to have flares from two antennas (far apart) but also >from the solar panels, and those can occur close to an antenna flare. >But the panels are controlled depending on Sun's "declination" above >the orbit plane, and at this time of year I don't find any for your >location (Rob Matson's IridFlar). Probably the panels are pointed >nearly 90 degrees from the orbit plane, close to the Sun near Marathon >period. > >And Iridiums move S-N or N-S essentially ! > >/Björn > >2012/6/23 Patrice Scattolin <scattol@videotron.ca>: >> About 2 weeks ago I've seen what I believed to be an Iridium flash but >> after it started dimming it brightned up again and then redimmed and >> rebrightend to finally extinguish. Has anyone else observed this? Was >> what I saw something other than an Iridium? I unfortunately don't have >> the exact date and time so the actual bird can't be confirmed. Beside >> another type of satellite, the only other thing I can think of is an >> Iridium doing an attitude change. Anyone knows. I typically don't record >> my observations but it's about as follows: (it crossed from West to >> East, june 16th at about 11:30pm, In Quebec at 45.602434,-72.670938 >> according to Google.) >> _______________________________________________ >> Seesat-l mailing list >> http://mailman.satobs.org/mailman/listinfo/seesat-l > > > >-- >---------------------------------------- >Björn Gimle, COSPAR 5919 >59.2576 N, 18.6172 E, 23 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-l > _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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