Re: [GZG] Satellite imagery

Well, the exact PSB you decide to use isn't really that important.  At
some 
point, one has to keep in mind that we're discussing a sci-fi future
where 
the problem of how to travel faster than light -- which current physics 
holds to be either impossible outside of maybe the outlandish theory of 
dropping through a singularity of some sort and somehow managing to stay

alive in the process.  I would tend to say that if we're going to play
game 
where this is not only a problem that's been solved but is made a
trivial 
element that we can abstract into a given, it's a little silly to say
that 
we won't also have developed a way to build spy satellites that doesn't 
force us to still use giant physical glass lenses in the telescopes.

E

----- Original Message ----- 
From: <sipior@sipior.net>
To: <gzg-l@lists.csua.berkeley.edu>
Sent: Friday, March 10, 2006 1:59 PM
Subject: Re: [GZG] Satellite imagery

>> So, if your target is at a fixed longitude, very low latitude, and
your
>> optics are excellent, then geosynchronous orbits make sense for this 
>> role.
>>
>> For Earth's orbit at the extreme end of the visible spectrum (400 nm)
you
>> would need a ~8.75 m diffraction limited telescope to get 2 m
resolution
>> (which is pretty poor.)
>>
>> Maybe there is some way to PSB all these considerations (and any I've
>> missed) away.  I just don't see them ;-)
>>
>> Cheers, Tony C.
>
> Gravitic lenses for light focusing. I think that was the PSB Traveller

> used
> to explain how a ship-mounted laser could cut through another ship at
five
> light-seconds without an emitter 100 meters across ;-)
>
> Cheers,
>
> M.
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