[Laser] Re : Re : "How to" page for laser pointer communications now online

[Garnier Yves]

Tom
The camera works fully automaticaly without other control.
Fitted with its new big objective it does not work at all by daylight because it is fully saturated.
You can have a look on the kind of film that it is possible to take with this very low cost camera modified with a powerfull objective :
http://sd-1.archive-host.com/membres/videos/22679775843705539/MB_aiming.avi
The bouncing target is the "Mont blanc", the highest mountain in France with its 4807 meters ASL.
http://sd-1.archive-host.com/membres/images/22679775843705539/Mt_Blanc_21_H.jpg
http://sd-1.archive-host.com/membres/images/22679775843705539/Good_optical_propagation.jpg
The film was taken by moonlight to 170 km.
The snow near the top is well visible.
Our goal is to get some laser echoes from the highest part of this mountain on a 340 km total NLOS path.
It is a very great chalenge but a new APD RX with its 60 cm in diameter mirror and a powerful new laser could let to us a small chance ? 
73 Yves F1AVY
http://f1avyopto.wifeo.com



--- En date de : Ven 16.4.10, Tom Becker <GTBecker at RighTime.com> a écrit :

> De: Tom Becker <GTBecker at RighTime.com>
> Objet: Re: [Laser] Re : Re : "How to" page for laser pointer communications now online
> À: "Free Space LASER Communications" <laser at mailman.qth.net>
> Date: Vendredi 16 avril 2010, 22h03
> It's amazing what technology and
> consumers can make for $16.
> 
> Yves, do you allow the camera to operate fully
> automatically, or do you 
> control its chipset?  Do you suspect that the noise in
> the images of the 
> clock and distant hills resulted from the camera's longest
> shutter 
> period and highest AGC gain?  Will your camera also
> operate in daylight?
> 
> Tom
> ______________________________________________________________
> Laser mailing list
> Home: http://mailman.qth.net/mailman/listinfo/laser
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Laser at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>