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• High Frequency Active Auroral Research Program — HAARP is often confused with Project HARP, the High Altitude Research Project (a joint project of The Pentagon and the Canadian Department of National Defence).The High Frequency Active Auroral Research Program (HAARP) is an investigation project …   Wikipedia

• Ionosonde — A ionosonde, or chirpsounder, is a special radar for the examinatation of the ionosphere. An ionosonde is a shortwave transmitter tunable through the whole shortwave range, which transmits on various shortwave frequencies pulses, whose echos are… …   Wikipedia