Hi.

I'm looking for the atmospheric attenuation coefficient for IR
wavelenght (1064 nm). How is this coefficient determined?

(Thanatos) wrote:

Hi.

I'm looking for the atmospheric attenuation coefficient for IR
wavelenght (1064 nm). How is this coefficient determined?

Mostly it will be a function of water vapor path length (assuming you
are interested in clear sky). You will need to do a literature search
for details of parameterizations.


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Thanatos wrote:
Hi.

I'm looking for the atmospheric attenuation coefficient for IR
wavelenght (1064 nm). How is this coefficient determined?

From Fig. 7.8 on the following page,

http://www.sundogpublishing.com/AtmosRadFigs.htm

it appears that attenuation through the depth of the atmosphere is
almost negligible at that wavelength (in the absence of clouds, of
course). If you need an accurate value, it will be a function of
humidity, pressure, and other variables. You'll need to get access to a
data base like HITRAN.


____________
Grant Petty
University of Wisconsin-Madison
Browse my new book "A First Course in Atmospheric Radiation"
at http://www.sundogpublishing.com/AtmosRad.htm