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Alaska usa history and Video\r\nAlaska usa history Alaska usa history Frequently Asked Questions (FAQ) About HAARP The High-frequency Active Auroral Research Program (HAARP) is the worlds most capable high-power, high frequency (HF) transmitter for study of the ionosphere. The principal instrument is the Ionospheric Research Instrument (IRI), a phased array of 180 HF crossed-dipole antennas spread across 33 acres and capable of radiating 3.6 megawatts into the upper atmosphere and ionosphere. Transmit frequencies are selectable in the range of 2.7 to 10 MHz, and since the antennas form a sophisticated phased array, the transmitted beam can take many shapes, can be scanned over a