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Cave Radios-Communicating between the underground and surface is pretty much impossible with normal radios. Here you'll find out how to build a sub-surface
radio using low frequency.
Echelon-The
NSA has created a system that can tap into any form of communication today including your phone calls. Is Big Brother listening to you?
Ekahau's Wireless Real-Time Location Technology Uses Standard Wi-Fi Networks To Pinpoint Miners Trapped Underground
Enhanced Underground Communications-The use of superconducting materials in communication equipment will increase the range of through-the-earth communications and make underground
wireless networks commonplace in underground mining operations.
FCC Auctions-Want to purchase
an electromagnetic spectrum? (radio frequencies) Then sign up here. Open to companies and individuals IF you have the money.
Fiber Optic Communications-Here is an article on the benefits of FO communications and the benefits.
Fire damages print business; radios fail in underground space-Most people don't realize communications fail between the underground and the surface.
GATR Technologies develops and markets deployable, inflatable SatCom antennas and systems that provide for quick deployment and high-bandwidth communications in remote, hard-to-reach areas.
Grundig Radio-Shortwave,
world news, wind up radio requires no battery.
Harris Long Range Communications-looking for portability? This High Frequency system comes in a suitcase small enough to fit under an airline seat.
The Model GPS - NovAtel's SPAN (Synchronized
Position Attitude Navigation) Technology combines GPS and inertial functionality to provide uninterrupted operation with highly accurate position and attitude measurements.
Quantum Teleportation-If I
understand this brief synopsis you could teleport your signal and talk instantly anywhere without any signal to tap into.
Tadiran Communications-high frequency radio can utilizes the ionosphere to
communicate over hundreds or thousands of miles without the need for satellite..
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