(meteorobs) Large fireball frequency calculations - Needs updating

[stange]

Interesting graph.

The problem as I see it is in accurately comparing fireball intensity 
(peaks) against fixed references..

Soon as I get done updating my website of old pic's of 2007 & 2008, I want 
to (try) calibrating the Python light curve against moon phases. Maybe a 
trial moving of the camera enough to cause a trigger and to get a brief 
light curve peak, or an off/on cable connector....something along those 
lines. It could work with a static picture but I have not checked yet, or 
given it any real thought yet as to best way.

Should work if brightness and contrast settings are not changed afterward 
which would change the calibration.

YCSentinel

----- Original Message ----- 
From: "Thomas Ashcraft" <ashcraft at heliotown.com>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: 2008/10/30 20:42
Subject: (meteorobs) Large fireball frequency calculations - Needs updating


>
>
> 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
> _______________________________________________
> Mailing list meteorobs: meteorobs at meteorobs.org
> To UNSUBSCRIBE, email: owner-meteorobs at meteorobs.org
> http://lists.meteorobs.org/mailman/listinfo/meteorobs