[Laser] Cloud Bounce, Comm or Distance

[Garnier Yves]

The cloud bounce efficiency depends very trongly of the clouds structure and the optical beams angular properties.
The dropplets size and density into a high altitude stratus layer covering a large area are determinent factors.
The other very crirical factor is the layer angle with the optical TX/RX beam axes that must be as flat as possible.
You can load a 20 Mo small film at :

http://sd-1.archive-host.com/membres/videos/22679775843705539/F5ONY_cloud_bounce_theory.avi

F5OMY did this very simple experiment prouving that the front scatter from dropplets is very stronger the back scatter.
It is the strange Mie scattering effect. 
73 
Yves F1AVY
http://f1avyopto.wifeo.com


--- En date de : Jeu 16.9.10, Mike <mikecouture at bellsouth.net> a écrit :

> De: Mike <mikecouture at bellsouth.net>
> Objet: Re: [Laser] Cloud Bounce, Comm or Distance
> À: "'Free Space LASER Communications'" <laser at mailman.qth.net>
> Date: Jeudi 16 septembre 2010, 23h22
> Hi Guys,
> 
> Do we have any interest in cloud bounce for either
> communications or
> distance measuring using low to medium power lasers or
> LED's?
> 
> I'm game.
> 
> Mike C.
> (sandbar west, FL)
> 
> PS Sorry, if this get a double hit, my at&t NO SERVICE
> is impossible.
> 
> 
> 
> 
> 
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