(meteorobs) Large fireball frequency calculations - Found it!

[stange]

I think this is it..... YCSentinel

http://aquarid.physics.uwo.ca/~pbrown/flux-final.pdf



----- Original Message ----- 
From: "Thomas Ashcraft" <ashcraft at heliotown.com>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: 2008/10/31 09:49
Subject: Re: (meteorobs) Large fireball frequency calculations - 
Needsupdating


There is an article on this subject in NATURE Magazine but it costs $32.
to access. The abstract is here:

http://www.nature.com/nature/journal/v420/n6913/full/nature01238.html

Does anyone have access to this article who can post a synopsis?

I was also told by a Sandia Labs researcher that "Regarding frequency of
large events, our satellite sensors detect 50-60 per year globally at
–17.5 and brighter. "

I am still hoping for more information.

Thomas Ashcraft



Thomas Ashcraft wrote:
> For what it's worth :
>
> The fireball frequency calculations that are referred at
> http://www.spaceweather.com/glossary/frequentfireballs.htm?PHPSESSID=27ojbhs2oliu6kadsjaj0gbhd3
>
> seem to me to be way underestimated.
>
> "According to his calculations, fireballs as bright as Venus appear
> somewhere on Earth more than 100 times daily. Fireballs as bright as a
> quarter Moon occur once every ten days, and fireballs as bright as a
> full Moon once every five months."
>
> My own camera system has captured four -13 magnitude events in the past
> year.
>
> So with fresh data from the various all-sky fireball networks maybe
> these calculations can be updated to give a more accurate picture.
>
> Thomas Ashcraft
> New Mexico
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