[Laser] NLOS Optical Comms

[Glenn Thomas]

Andy -

If I were you, I'd be looking very closely at the physics associated with Rayleigh scattering. Also, at the absorbsion spectra of air, clouds, fog, smog, smoke etc etc etc to see if any windows happen to line up. If none do, then you have reason to conclude that the scheme is a "non-starter". 

73 de Glenn

At 04:26 PM 11/15/04 +0000, you wrote:
>Dear All,
>
>I was hoping i could pick your collective brains regarding Laser Comms. I'm a post-doc student at the University of Durham in the UK and I have been asked to look into the possibility of non-line-of-sight free-space optical comms. My supervisor hopes that a signal can be detected from a laser pointing straight upward by receivers located within a mile or so radius of the transmitter- so far so good, but he also wants the system to operate in daylight, clouds or no clouds, fog or no fog and at high frequency! My initial reaction is that this is a non-starter- what do you think?!
>
>Regards,
>
>Andy Maiden.