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Location: UFOUpDatesList.Com > 2012 > Aug > Aug 27

Re: Chasing Mexican UFOs

From: Michael Tarbell <mtarbell.nul>
Date: Mon, 27 Aug 2012 09:24:30 -0600
Archived: Mon, 27 Aug 2012 15:58:58 -0400
Subject: Re: Chasing Mexican UFOs

>From: Bruce Maccabee<brumac.nul>
>To: post.nul
>Date: Sun, 26 Aug 2012 14:19:05 -0400 (EDT)
>Subject: Re: Chasing Mexican UFOs

>>From: Michael Tarbell<mtarbell.nul>
>>To: post.nul
>>Date: Fri, 24 Aug 2012 13:39:53 -0600
>>Subject: Re: Chasing Mexican UFOs


>>Hence the total 3-5 micron radiant power at 100 mi. range
>>required to noticeably exceed the atmospheric background
>>radiance at the camera is at least ~7000 x 6.5 megawatts or ~46
>>gigawatts, which is some 7 times the hydroelectric power output
>>of the Grand Coulee Dam.

>>While it would clearly rule out the oil field flare theory, this
>>number is so enormous that I'm seriously doubting my own
>>calculation. Can you point out where/if I went astray? Not
>>really my area of expertise, so >>please set me straight if


>This FOV is spread over a focal plane array of pixels that is
>320 by 240 (half the NTSC standard TV linear resolution). Thus
>one pixel in the MED resolution has an instantaneous (linear)
>FOV (IFOV)(vertical and horizontal) of about 3.4/320 = 0.011
>deg. Thus the angular size of the fire, 1.1E-3 deg, is much
>smaller than the angular resolution of the sensor in the MED
>setting, 0.011 deg, so, to the FLIR system the image of a fire
>of that size and distance would "fit onto" a pixel.

Thanks Bruce, this is exactly where I went wrong... using the
entire camera field of view instead of that of a single pixel,
which of course is the most that would be directly illuminated
by a point source (although the objects in the video clearly
occupy more than a single pixel... if this is indeed due to
'slop over' from a single intensely illuminated pixel, then
obviously the source is far exceeding the 1%-of-background
criterion I used to estimate its minimum power).

I have since obtained more refined data about atmospheric
irradiance and extinction properties in the infrared, and will
return soon with a revised calculation, including an estimate of
the radiant power of an oil well flare in the relevant
wavelength band.



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