(meteorobs) Strange Lightcurves

[Russell McCrackin]

Hi Mark
Following is wild guessing.    The first "flash" was fainter (less bright) 
than the seond.  Imagine a particle made up of two different types of 
material.  Particle enters atmosphere, heats a thin layer of material that 
burns/melts/ablates at a slightly lower temperature and is consumed quickly, 
before the second material reaches incandescent temperature.
Yes? No? Maybe?  Wild guess? Yes.
Russell McCrackin


----- Original Message ----- 
From: "mark_vornhusen" <mark at vornhusen.de>
To: <meteorobs at meteorobs.org>
Sent: Saturday, September 15, 2007 11:45 AM
Subject: (meteorobs) Strange Lightcurves


Hi,
I noticed that some meteors become nearly invisible for a moment and
then reappear again. Here are two examples, taken with an xx1332 image
intensifierer and 120mm lens (crops from original 720x576 pixel video,
1/25s per frame):
http://www.parhelia.de/storm/2007/meteor_20070910_013826.gif
http://www.parhelia.de/storm/2007/meteor_20070912_022427.gif

I'm looking for an explanation of this phenomenon. Any ideas?

Mark


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