(meteorobs) Optimized filters for daytime fireball video capture?

[Larry]

Thomas,

In my attempts to do just that about 2 years ago I ran into a number of 
problems besides  sunlight issues, artifacts, & band filtering issues.

For us to attempt daylight capture of fireballs whether all-sky or not, the 
larger issues were control of contrast, brightness, & threshold. ESPECIALLY 
pixel threshold for trigger.

We would need an AUTOMATIC software function which would readjust pixel 
threshold at frequent intervals throughout the day. Also the camera then 
becomes more sensitive to DARK FLIGHT than bright flight when operated in 
daylight modes.

Notice what your "Test Video" is doing during daylight......nothing! It 
would take a nuclear blast to trigger it essentially. Then start readjusting 
pixel threshold and all your basic brightness & contrast setting two where 
you start getting a threshold count in "Test Video" during any part of the 
day......

It will be so far away from your night settings that you would have to reset 
everything for ANY night captures in addition to your all-day constantly 
changing your settings for a fireball with changing sunlight blossuming of 
substrate pixels.

I see no solution at the present time, or before, even with attempts to 
lollypop the sun itself.

YCSentinel
(jumping in quickly)


----- Original Message ----- 
From: "Thomas Ashcraft" <ashcraft at heliotown.com>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: 2009/05/25 08:13
Subject: (meteorobs) Optimized filters for daytime fireball video capture?


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