June 29th 09, 05:03 AM
posted to sci.astro,rec.radio.amateur.space,rec.radio.amateur.antenna,sci.astro.seti,sci.physics
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external usenet poster
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First recorded activity by RadioBanter: Jun 2009
Posts: 1
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High data rate space transmissions through visible lightcommunication.
On Jun 28, 8:31*pm, Robert Clark wrote:
On Jun 28, 1:41 pm, Richard Clark wrote:
On Sun, 28 Jun 2009 17:14:14 +1000, "Peter Webb"
wrote:
Furthermore, the radiation from a reflected area is isotropic - goes in all
directions - and hence very little is directed towards the earth.
Actually, it is lambertian in its distribution, and it would have a
major lobe that was directed in rather typical fashion (at the same,
but negative angle to the norm to the surface). *However, as is the
intent of your response, very much less will find its way to the
intended target.
73's
Richard Clark, KB7QHC
*This describes the reflection from the Iridium antennas as specular
where most of the reflected light is concentrated in a single
direction:
SeeSat-L Apr-98: Method for predicting flare.http://satobs.org/seesat/Apr-1998/0175.html
*About specular reflection:
Specular reflection.http://en.wikipedia.org/wiki/Specular_reflection
*We could get even higher concentration of the image by using
parabolic mirror reflectors.
So basically you discovered the parabolic antenna. Congratulations.
CM
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