[Laser] Air Transmission Properties

[J. Forster]

There were programs calles NASTRAN and LOWTRAN  years ago, but  don't know about
their recent history.
-John

David D. Rea wrote:

> Good morning all,
>
> I've been working on a point-to-point laser system for mountaintop DX
> class work for about a year now, and as part of an independent study for
> school I need to model the system. I need to characterize air as an
> optical transmission medium - I'd like to find some equations that
> relate wavelength, dewpoint and distance to absolute optical
> attenuation. Additionally, I need to create a noise characterization
> based on levels of ambient light measured at the detector, so that I can
> come up with an overall equation for SNR.
>
> Can anyone suggest some reference materials for obtaining these
> relations?
>
> Thanks and 73
> Dave KB2YQE
>
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