(meteorobs) Optimized filters for daytime fireball video capture?

[Thomas Ashcraft]

Hi Ed and all,


I wonder if it is possible to isolate the specific spectrographic 
wavelength for burning ( or ionizing?)  nickel-iron?

Thomas

 

Ed Majden wrote:
> 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:
>   
>
>