[Laser] Re : reply to Tom regarding low paths over the sea

[Chuck Hast]

On Wed, May 11, 2011 at 12:25,  <f1avyopto at aol.com> wrote:
>
> Hello all
> This extended path over sea is not very near the water but is is just an air refraction curvature effect or a ducting effect if temperature inverting.
> So it seems to me the spectrum properties in the air mass could be very similar a point to point LOS one.
> Have a look about this 250 Km NLOS optical path in France in over sea conditions.
> http://jfcoliac.free.fr/Astro/Canigou/canigou.htm
> Use the Google translator to convert Franch to English
> The solar picture is very red because the standard blue absorbing air effect but the infrared spectrum could be not deeply changed on the path.
> On 850 nm for to escape the water line loss near 900 nm, this NLOS path seems very possible.
> 73.
> Yves F1AVY
> http://f1avyopto.wifeo.com/
>
Yves,
Have you folks tried that path yet?? That would be a interesting one to run
various wavelengths over. I just looked at the overwater path, nice wide
one.

-- 

Chuck Hast  -- KP4DJT --
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