(meteorobs) Optimized filters for daytime fireball video capture?

[Ed Majden]

Hi Thomas:
	I'm not sure if filters would be that effective.  A meteor spectrum  
produces emissions from around 340.0 nm (Violet) to around 900.0 nm  
( near ir red end).  Selecting a narrow region at the red end will  
reduce the output of total radiation produced by a fireball.  If you  
go to my web site located at: http://members.shaw.ca/epmajden/ 
index.htm and look at a spectrum signature you will see what I mean.   
You need to reduce the intensity of the Sun first.  I have read  
somewhere that a driven occulting disk that blocks out the Sun and  
tracks it across the sky could be used but this would be complicated  
to do I would think.  A red filter could be used in conjunction  with  
this occulting disk to reduce light scatter.  During daylight you may  
see a dust trail but this is in the visible region so a filter may  
not be effective..  I wonder if one of our professional meteor types  
could comment on this.
Ed Majden - EMO meteor spectroscopy
Courtenay, B.C.
Canada

On 25-May-09, at 8:13 AM, Thomas Ashcraft wrote:

> I am wondering if anyone has experimented with infrared or any other
> special optical filters that would be *optimum* for detecting daytime
> fireballs? I am wondering if a filter could be made specifically  
> for the
> wavelengths of meteor burn signatures so as to make the meteors  
> visible
> in the midst of a bright daylight sky?
>
> I have used a red filter for my own all-sky video camera and have  
> tried
> to detect daytime fireballs at times of forward scatter radio  
> receptions
> when I knew that fireballs were above in my local daylight sky but I
> have been unsuccessful at distinguishing any meteors thus far.  
> Hence, I
> wonder at filter and wavelength optimization.
>
> Has this been worked on?
>
> Thanks in advance for any information or thoughts on the subject.
>
> Thomas Ashcraft  /  New Mexico
>