Message Board Thread - "Attenuation"

Title	By	Posted On
Attenuation	A. Pertence	1/11/2010
Who can make available to me an attenuation curve for infrared radiation in normal atmospherical environment? Thanks in advance. Argemiro Pertence Rio de Janeiro - Brazil.
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Re:Attenuation	Top Gun	1/13/2010
I have performed IR thermography on supercell thunderstorm cloud bases and tornadoes which are at a significant distance from the camera. I will assume you are using microbolometer-based imager(s). We established through references that temperature estimation through thermographic radiance measurements is reliable out to about 3 kilometers. Attenuation becomes very significant there and increases to complete unreliability at 5 kilometers. We were operating in conditions where the dewpoint was around 19 degrees C. As the dewpoint increases above 22 degrees C., the reliability zone will decrease from these shared here. I hope this helps!
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Re:Attenuation	Top Gun	1/13/2010
Here is the IR of the same shot.
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