Here is a good factory-view on the stage you see in the video. (the separate part): http://tinyurl.com/32w8ynf Ralf (high res) Soyuz rocket tumbling observation _update 1________________________________________________________ Here is the best presentation of the animation I could get. It's one of my most interesting observations so far. I really was amazed to see how dynamic the rocket stage appeared over the short time in the frames. The best comparison and proof were the frames of the Soyuz spacecraft itself I captured a few minutes later. The stabilized Soyuz appeared in the frames very neat at one position. http://tinyurl.com/38g27c4 Ralf On June 17, one day after launch of the Soyuz TMA-19 with the expedition 24 crew on its way to the ISS, the 3rd stage of its rocket and the Soyuz itself passed over the Netherlands. The apparant speed of the 2 objects was at that time much higher then the ISS, due to its still lower orbit. The rocket passed about 15 minutes before the Soyuz and was in a low orbit of below 200km. When I inspected the frames of the rocket one obvious thing I saw was a different position of the rocket over the short time during its pass. To be sure, this is not caused by any movement artefacts due to the highspeed, I only used frames which show a clear elongated shape of the rocket in the not-move direction. About halfway the animation, we seem to look even towards the short axis (long axis pointed to Earth) Usually, different forces cause a rocket to tumbling after it separates and is not longer stabilized and can free rotated in Earth orbit. Beside magnetic field forces, especially with rockets below 200km altitude like this one, they are influenced heavily by aerodynamic forces. Interesting page about this matter: http://www.satobs.org/tumble/rottheory.html Best wishes, Ralf http://ralfvandebergh.startje.be/vieuw.php?qid=328303 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mailman.satobs.org/mailman/private/seesat-l/attachments/20100624/d75ed397/attachment.html _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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