"Ambient backscatter techniques utilize the ever-present cloud of TV and cellular signals already in the air."


"The team was able to demonstrate communication from node to reader over 22 m (72 ft) when using ambient signals from broadcast towers, and over 50 m (164 ft) with data rates of up to 1 kbps by simultaneously harnessing 17 ambient signal sources."






Submarine communication with low frequency electromagnetic signals


BBC Horizon show - episode "The Mysterious Mr. Tesla" presented by Bob Symes in 1982



Introduction: Radio waves do not travel well in electrical conductors like salt water. This means that submarines have to approach the surface to receive communication signals. However, electromagnetic signals of low frequency can penetrate seawater, and the lower the frequency the deeper they reach. 


Transcript from the video starting at 4.46 (Note that the show was presented in 1982).
"ELF, extremely low frequency* will be most important for the United States submarine fleet in years to come. Could submarines be protected by a development of Tesla's wireless work?"


*3 to 30Hz


"Submarines are at their most vulnerable when they approach the surface to communicate with their headquarters. To change that, the US Navy is building two giant wireless stations up near the Canadian border, in Wisconsin and Michigan. Each of them will radiate under 4 Watts just enough to light a doll's house but the power behind each transmitter will be enormous. The station at Clam Lake needs two aerials each 14 miles long. That's because the signals, like the Woodpecker, will go out at extremely low-frequency (ELF) which requires special arrangements. Because ELF is low frequency it takes a long time to send a message, but it does penetrate the ocean to great depth. Vessels like the newly-launched Ohio will be able to receive operating orders without ever rising to the pedals at the surface." 


"Most 'Teslarians' believe that the great man described ELF transmissions in his patents and that the US Navy went back to these papers for the concept. But what did Tesla actually say? 'It is necessary to employ oscillations in which the rate of radiation of energy into space in the form of hertzian or electromagnetic waves is very small. The lowest frequency would appear to be 6 per second.' All credit to Tesla for even thinking in this area but it comes clear from the context that he was describing the sending of electrical energy without wires through the earth and not the sending of radio waves through the sea."


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BBC Horizon show (1982) investigates the “Russian Woodpecker" electromagnetic signal, a 31-bit binary with 10Hz repetition rate transmitted to many countries worldwide



A shortwave over-the-horizon radar? (Detecting targets at very long ranges, beyond ordinary radar horizon).


Linked to mind control and behavioral modification? Dr. A. Michrowski says it is a signal of same frequency range and same type as brain signals.



From the BBC Horizon show episode "The Mysterious Mr. Tesla" presented by Bob Symes in 1982. (Link)


The episode can be found in four videos of this YouTube playlist: 


The relevant video is part 3.

A video demonstrating the Woodpecker and providing an equivalent German paradigm – by Martin Bott


Martin Bott: « In 1982 the BBC Television series Horizon reports about the Soviet shortwave Woodpecker radar. A shortwave radar allows to see objects, especially rockets beyond the horizon. This is possible because shortwave radio signals, in contrast to microwaves, are reflected back to the earth in the ionosphere. »



Figure 1: The WoodPecker


Bob Symes: "The noise is called the Woodpecker because it makes this pecking noise 10 times per second. It is being going on since 1976 and has blotted out radiotransmissions on frequencies between 6 and 20 MGHz. Ten pulses a second is extremely low frequency. The Woodpecker has been traced to Latvia, there seems to be a second trasmitter near Kiev and the third further to the East. It is not jamming, it is too random. So what are the Russians up to ?"



1st Hypothesis: An over-the-horizon radar


"The Russians might be trying a form of over-the-horizon radar which would allow them to locate incoming objects with extreme accuracy even if they are totally out of line of sight. One analysis says every Woodpecker pulse carries a sophisticated carrier. Each pulse lasts 3100 microseconds."



Figure 2: Trace of WoodPecker


Note : Please refer to the 3rd figure (grid) which represents one pulse of 3100 microseconds. There are 31 columns or 31 squares per row, each representing one bit having a width of 100 microseconds.


The signal is described as "a 31-bit pseudo-random binary sequence, with bit-width of 100 μs (3.1 ms pulse) and 10Hz repetition rate".

Bob Symes : « Over a sequence of a 100 microseconds intervals, the signal is counted as a zero until it reverses phase or direction. Phase reversal changes the zero to one. Each further reversal forges 1 to 0 and back again until all the pulses have been transmitted. The final list gives what is called a maximum length pseudorandom binary sequence, a unique code. When a signal returns from an approaching object it can only be used if its pattern matches precisely the pattern of the transmitter signal a sort of key that fits into a lock. The result gives a radar system which can see five times further than any ordinary radar of the same power or more likely five times more accurately at the same distance. »



Figure 3: Representation of one pulse of 3100 microseconds. 31 bits of a 100 microsecond width are shown.


Keywords : Woodpecker, Pseudorandom noise (PRN), Pseudorandom binary sequence,

Noise signal (signal - audio or electromagnetic - produced by a stochastic process), White noise (flat power spectrum profile), Pink noise (i.e. power-falling-with-frequency profile)



2nd hypothesis: Mind interference and behavioral modification


Bob Symes: Andrew Michrowski is an official working for the Canadian government in Ottawa. In his spare time he runs a group called Planetary Association for Clean Energy, PACE for short (http://pacenet.homestead.com/). PACE thinks the Russians are using a Tesla transmitter to affect the way we behave.


A. Michrowski: Now, the signals, especially those seen on the oscilloscope, which are magnetic only by the way (that's the sort of the signal), that happens to be something that can work on my brain and anybody on this planet at this time. Because it is the same frequency, in the same frequency range, and it is also the same type of activity that goes on in our brain. That is the terrible thing about this signal. The capacity to impose on the way people would quote “think”. This thinking, what I'm talking about is the thinking of being “peaceful”, the ability to be calm, the ability to rationalize; all these are affected from the purely mental point of view by signals of this nature.


Bob Symes: Is there any defense? This personal transmitter puts out 7.8 cycles per second, which Michrowski says is a natural planetary frequency the body is tuned to. It swamps the incoming signal from the Woodpecker. Remove the transmitter’s protective field and the Russian signal reasserts itself.


A. Michrowski: It is being used as far as we're aware of by the German civil service (...), and it is mainly a protective mechanism to ensure that the German civil servant, especially on external affairs duty, is able to keep his composure for negotiations, especially with other people, other countries, to make sure that they're not influenced.


Bob Symes: The German government denies using the microset but Michrowski is sure it works. 



Figure 4: Woodpecker signal




Figure 5: Woodpecker signal overridden by German transmitter signal


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Detecting a shortwave radar signal in one's living-room


(Same video as above - demonstration by Martin Bott)


Martin Bott [2''.44']: "(...) Shortwave radars allow for easy detection with a cheap oscilloscope. In the case of microwave radar you either need an expensive oscilloscope suitable for microwave measuring or if sufficiently low pulses are used by a microwave radar, a diode may be used to rectify the microwave. This rectified signal allows to show the pulse form on a cheap oscilloscope.


Here I have connected a one-meter antenna to an oscilloscope. It shows a shortwave radar signal at a very high pulse repetition rate of 100.000 pulses per second. This makes it unsuitable for long range surveillance. The signal was measured today (2012-04-11) in our living room."



Figure 4: Radar signal detection with an oscilloscope