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Re: Useless questions
Original poster: "rheidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>
An immaging radar of 3CM should be able to see the ion cloud when used
through the cloud off a reflector. If the radar has FTC or STC that would
nead to be turned off. An ion cloud should be reflective enough to see.
> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Sat, 23 Feb 2002 18:24:50 -0700
> To: tesla-at-pupman-dot-com
> Subject: Re: Useless questions
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Sat, 23 Feb 2002 18:30:09 -0700
> Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> Tesla list wrote:
>> Original poster: "Paul Nicholson by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <paul-at-abelian.demon.co.uk>
>> Jim, Ed, All,
>> I wasn't thinking of trying to form any sort of an image with the
>> radar, just hoping the radar would 'see' an overall reflection from
>> a sphere of ionisation around the topload. Then
>> a) The amplitude of the return would give info about the size
>> and/or density of the ionisation - we could see how quickly it
>> forms, and try to observe its persistence between cycles/bangs.
>> b) Observe the surface of the 'ionisation sphere' move towards/away
>> from the radar by looking for doppler-induced sidebands - the line
>> width of the return would tell us how fast it was moving, and the
>> homodyne is perfect for that, isn't it? You'd tap into it right at
>> the detector for max BW.
>> As for interference, I don't know. I'd guess that at 10Ghz you'd be
>> up above most of the hash. You'd need to take firm action to
>> prevent the coil RF from getting into the radar DC supply, etc, eg
>> battery powered, faraday cage, with small window for the radar to
>> see out through?
>> Paul Nicholson
> I'm sure that a) is indeed true. As for b) I can't see any way that
> the relatively low frequency doppler component of an echo from something
> as turbulent as streamers could be separated from the background noise.
> That's where a wide-band pulsed system could probably be used, if one
> were available.