Ah....yes I had not noticed that and it was confusing me too as on another video....which I have been trying to find it had a countdown of time and that did match also at least 98 seconds.....wish I could find that one again....looked at so many.
G On Sun, Feb 17, 2013 at 4:54 AM, Robin Whittle <[email protected]> wrote: > A list member kindly pointed out that there was more than a few seconds > deleted from this video. I didn't look at the minutes figure. > > The meteor is overhead at 43:06 and the shockwave arrives at 44.34. > > So this puts the altitude about three times the 8.7km estimated by Bob > Matson. From: > > > http://en.wikipedia.org/wiki/Speed_of_sound#Altitude_variation_and_implications_for_atmospheric_acoustics > > http://en.wikipedia.org > /wiki/File:Comparison_US_standard_atmosphere_1962.svg > > the speed of sound varies somewhat. Since this is a large positive > pressure wave, maybe it would travel somewhat faster than a small > pressure wave at these higher altitudes. Sticking with the 310 > metre/sec guesstimate of Bob Matson, 98 seconds gives us 30.4 km. > > - Robin > > > > ______________________________________________ > > Visit the Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
