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Re: Looking for Meteorites with Infrared binoculars





Jeffrey Grantham
Client Solutions Manager
IBM Global Services

303-939-3216, (T/L 263-3216)
Pager 800-759-8888, PIN 882-6369
Fax 303-939-3657, (T/L 263)

---------------------- Forwarded by Jeffrey Grantham/Boulder/IBM on 06/21/99
10:29 AM ---------------------------


Jeffrey Grantham
06/21/99 10:27 AM

To:   GeoZay@aol.com
cc:
From: Jeffrey Grantham/Boulder/IBM@IBMUS
Subject:  Re: Looking for Meteorites with Infrared binoculars  (Document link
      not converted)

Hi,,

I have been following this IR discussion as I am an IR spectroscopist.  Sounds
like it would work to me if we can fine turn the environmental conditions for
maximum IR differentiation.  I do believe that many detectors today do not
require liqiud N2 as some of the older models did.  They of course would not be
as sensative, but more practicle in the field and much less expensive.

Perhaps we could get several field hunters together and rent one for a week or
so.  I would be up for that type of field experiment.  Any takers?

Cheers,

Jeffrey



GeoZay@aol.com on 06/19/99 03:25:35 PM

To:   rmarlin@network-one.com, meteorite-list@meteoritecentral.com
cc:    (bcc: Jeffrey Grantham/Boulder/IBM)
Subject:  Re: Looking for Meteorites with Infrared binoculars





In a message dated 99-06-19 16:57:15 EDT, you write:

<<
 >Gene, with the device we trained on in  our fire department that I
 mentioned
 >earlier, one can also see the outline of a human hidden in a wooden
closet.<<

 >>But the human was emitting its own heat. What I meant was that a meteorite
 that was shaded may not warm up enough to stand out from the ground and the
 dark green plant.
  >>

Gene, I can't really argue very heavily if this idea would work or not, but I
do know the gadget we played with was sensitive enough to clearly pick out
the footprints of a person that casually walked by wearing boots. The heat
difference between the floor and the boots couldn't have been all that great.
Besides noting this in an environmental training building with room
temperatures at around 500 deg F., it worked and looked the same in an
airconditioned room as well. We all played with it each being amazed that it
was able to do this. I don't know how long we could still see the residual
footprints, but they were still there after a couple minutes at least, though
getting weaker when we were thru getting our fill of looking at them. It
doesn't take long to get bored looking at one's footprints really.  :o)

If such a scheme should work, I would think the best time to use it would be
perhaps the first few hours after sunset while heat is being re radiated? I
believe the ground absorbs the various sunlight frequencies during the day,
but somehow converts what has been absorbed into infrared to be re radiated
during the night? Perhaps this heat(heat is another word for infrared by the
way) from the ground is more readily absorbed by iron like objects to show up
in such a device more prominently than the material in the natural
surrounding?
GeoZay

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