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Re: Goubou line, "G-line" (was Tesla Coil RF Transmitter)

Original poster: Paul Nicholson <paul@xxxxxxxxxxxxxxxxxxx>

Robert Heidlebaugh wrote:

> A signal can be transmitted through the earth...

> The only way it can work is by producing a standing wave
> energy in the ground just like a transmitted wave
> in space from an antenna.

Yes, indeed.   Some important stuff is based on passing
radio waves through the earth...

a) Comms to submarines (80Hz), cavers (10-100kHz), etc.

b) Ground penetrating radar, for archeology, geology, mining, ...
   (UHF to Microwave).

c) Magnetotellurics. (0.1-100Hz)

The latter is an interesting one.  It exploits the background
incident field at ELF.  These waves penetrate the ground,
sometimes to 10 km or more, inducing currents which in
turn contribute to the EM field above ground.  MT analyses
the EM field at the ground surface, decomposing the field
into incident and reflected waves, and software, by a complicated
process of tomography, deduces the subterranean distribution
of conductivity necessary to create the observed surface field.

 http://www.google.co.uk/search?q=%2BMagnetotelluric
--
Paul Nicholson
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