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Re: Long duration recording and update on my work

Subject: Re: Long duration recording and update on my work
From: "David Michael" wildlifeanalysis
Date: Sun Jun 7, 2009 11:28 am ((PDT))
Thanks for sharing this Thomas

I have been really interested in this recently - there is a book called "Ra=
dio Nature" (http://www.vlf.it/libro_sandit/radionatura.html) that I am dyi=
ng to get ahold of.

I take your position that this is nature recording. In fact, if I remember =
correctly from my limited research, there is a dawn and dusk chorus in elec=
tromagnetism produced by the Earth's magnetosphere.. is this correct?

I also wonder about how man-made transmissions are affecting this chorus si=
nce we have sliced up the usable spectrum (even VLF?) for our own uses.

As for the biological connection I am very skeptical. Outer space is an ext=
raordinarily hostile environment for life - even for the most hardy of exam=
ple organisms from Earth. Ultraviolet light on Earth alone is enough to des=
troy DNA in most (but not all!) bacteria. Add to that the pressure and heat=
 of an atmospheric entry and whatever organism that might have survived spa=
ce must now weather a literal firestorm... not impossible, just a little im=
probable... Like I said though, I'm skeptical and need more information. Bu=
t maybe this is a topic for another time/place :)

Cheers
David

--- In  Thomas Ashcraft <> wro=
te:
>
> (I am writing partly in response to the Fostex file limitation thread.)
>
> I have been doing nightly ten hour long duration outdoor recording since=

> last February 2009 with an Edirol R09HR powered by a Tekeon power pack
> and recording to a Panasonic 16 GB SDHC memory card. It has worked
> without a glitch.
>
> :
>
> My recording project has been to attempt capture direct VLF/ELF radio
> emissions from meteors in conjunction with my all-sky video camera
> system. I have about 100 visual captures and have about ten meteors that=

> exhibit possible direct electromagnetic emissions but I consider them
> inconclusive thus far. Here is a sample data/video/sound page from last
> night:
> http://www.heliotown.com/Fireball_June_07_2009.html
>
> Some people would put these studies in the realm of physics or radio
> astronomy but I also personally consider it "nature recording". Aside
> from physical meteoric infall I think there might also be a possible
> biological and/or microbial aspect in the space dust, as yet to be
> discovered.
>
> Hence, I fire up my trusty Edirol each evening for the long duration
> vigil.   :-)
>
> Thomas Ashcraft
> New Mexico
>








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