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Re: (meteorobs) November 16 fireball
Helo Aart --
This sounds very interesting. In my hobby of radio DXing (listening
for distant stations) I have been attempting to hear FM stations via meteor
scatter, with varying degrees of success... but I would really like to hear
this tape of yours.. Any chance of uploading it as a .wav file
somewhere?? I think others would like to hear this too.
Just wondering....
Mike Csorbay
Aart Olsen wrote:
> I have a good radio forward scatter record of the Nov 16 midwest
> fireball. At my location (Urbana, IL -- 40 06 13 N, 88 12 55 W) the
> signal is first detectable at 18h 04m 05s Central Standard Time and
> lasts for about 90 seconds. On the tape are heard the simultaneous
> forward scattered echoes from six transmitters, and it is a marvelous,
> rip-roaring cacaphony of sound!
>
> The receiver was listening to 83.24 MHz, but I don't know where any of
> the transmitters are located. At the beginning of the event the echo's
> pitch drops from 1165 Hz to 850 Hz in 3.65 seconds. It will take a
> little more data to yield a good velocity but that's a start.
>
> This may have been a satellite reentry, but of course it *did* happen at
> the time of day when most big fireballs, bolides and meteorite falls
> happen. The big stuff is asteroidal and, because of the way asteroid
> derived orbits cross the earth's orbit, these bodies tend catch up to
> the earth from behind, i.e. 6 pm plus or minus a few hours. I've seen
> several really big fireballs in the last 30 years and they've all
> happened in the late afternoon and early evening. So a natural meteor
> is a sufficient explanation.
>
> --
> Aart Olsen
> aolsen@prairienet.org
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