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Re: Satellite communications from hand helds

Michael Hart wrote:

> Last night I saw a show about the US ECHELON network.  They indicated that
> the satellites used could receive signals from mobile telephones.
> I realise that the NSA budget is probably a little bigger than AMSAT's but
> since amateur hand helds put out signifcantly higher power levels than
> mobile phones is should be easier to receive them.
> What are the main technical problems in designing a satellite to enable hand
> held FM communications via satellite?

Already been done.  UO-14 and SO-35 come to mind.  When there is no QRM, both
are (or were in the case of SO-35) easy with a handheld.

Jim Walls - K6CCC
626-302-8515    FAX  626-302-7501
AMSAT member 32537 / WSWSS member 395

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