We also have to consider a brand new digital standard too.  I wonder what
that would be considering that interference and electrical noise is so
common down there.





On Thu, 3 Aug 2006, Colin McDonald wrote:

> are you sure it goes to 30K, and not 300K?
> 300K is a bit more common for your average HF wide band receiver.
> 100 is the next most common.
>
> at any rate, its about time they start using ground penetrating RF signals
> to communicate.
> I think there has been some research by NASA into those possibilities, but
> nothing camercial yet.
> I wonder what freq range  they are looking at using.
>
> 73
> Colin, V A6BKX
> ----- Original Message -----
> From: "Jeff Kenyon" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, August 03, 2006 4:25 PM
> Subject: New VLF Radio Technology (fwd)
>
>
> > Hi everyone, I just saw this and it came in with the last post about FM
> > DX.  I don't konw about the rest of you, but the lowest my equipment will
> > go in frequencies is 100 KHz on the F6A.
> >
> >
> >
> >
> >
> > ---------- Forwarded message ----------
> > Date: Thu, 3 Aug 2006 15:17:32 -0700
> > From: Punworg <[log in to unmask]>
> > To: [log in to unmask]
> > Subject: New VLF Radio Technology
> >
> > Quick!  Somebody design some new scanners!
> > ---------------------------------------
> > New 'underground radio' technology improves emergency
> > capabilities
> >
> > New Mexico Business Weekly - 12:43 PM MDT Wednesday
> >
> > Los Alamos National Laboratory says Vital Alert
> > Technologies Inc. has signed two exclusive license
> > agreements with the lab for Underground Radio=99, a
> > technology that will provide two-way voice and text
> > capability known as Through-The-Earth-Communication=99
> > for first responders, rescue and security teams,
> > underground miners and the public in critical
> > emergency situations.
> >
> > Underground Radio, originally developed by LANL for
> > the Department of Energy, is being commercialized by
> > Vital Alert Technologies for use by emergency crews in
> > urban centers and by the mining industry.
> >
> > Vital Alert is a wholly-owned subsidiary of Vital
> > Alert Communication Inc. Vital Alert develops pre- and
> > post-emergency, safety and rescue technology for the
> > urban and mining communications sectors.
> >
> > "The new technology is a breakthrough in digital and
> > wireless communications," says Joe Miller, president
> > and CEO of Vital Alert, in a news release. "As a pre-
> > and post-emergency warning, evacuation and rescue
> > communication system, it solves radio frequency
> > failure problems and eliminates systems' downtime
> > complications in difficult environments such as
> > subways, tunnels, skyscrapers and mines. The new
> > technology will also greatly enhance the ability of
> > mining companies to protect their workers."
> >
> > Underground Radio uses very low frequency (VLF)
> > electromagnetic radiation and digital audio
> > compression technologies to carry voice and text data.
> > The VLF signals also can transmit tracking and
> > location data for radio users in case they are unable
> > to respond.
> >
> > "This is a technical solution to the problem of voice
> > communication in underground areas," said David
> > Reagor, the principal investigator of the Los Alamos
> > team that originally developed the technology. "It's
> > also inexpensive to build."
> >
> > Underground Radio can be used to alert individuals of
> > underground conditions during blasts, fires or
> > collapses, or to locate trapped miners. The technology
> > was designed to provide convenient, portable
> > underground communication and a data link to robotic
> > machines.
> >
> > Peter Vieth
> > KB4FVJ
> > Roanoke, VA
> >
> > __________________________________________________
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