Superpulse
Encyclopedia
Superpulse is a term for very strong man-made radio signals. The two most common instances of superpulses are those transmitted by the VLF transmitter GBZ
, and occasionally by an unidentified station on 17.8 kHz.
The purpose of superpulses is unknown, but they are believed to be an element of an obsolete sound-based navigational system. Superpulses can overdrive the front-end amplifier of a PC several hundred kilometres away from the transmitter, when a PC with an aerial attached to its soundcard is used as a VLF receiver.
GBZ
GBZ is the call sign of a British VLF transmitter on 19.6 kHz from Anthorn, Cumbria , which is involved with transmitting encrypted signals to submarines...
, and occasionally by an unidentified station on 17.8 kHz.
The purpose of superpulses is unknown, but they are believed to be an element of an obsolete sound-based navigational system. Superpulses can overdrive the front-end amplifier of a PC several hundred kilometres away from the transmitter, when a PC with an aerial attached to its soundcard is used as a VLF receiver.