HAARP | Function, Location, & Facts | Britannica
https://www.britannica.com/topic/HAARP
Web ResultMar 11, 2024 · HAARP, scientific facility for studying the ionosphere, located near Gakona, Alaska. The main instrument is the Ionospheric Research Instrument (IRI), an array of 180 radio antennas spread over an area of 0.13 square kilometer (33 acres). The ionosphere is the outermost layer of Earth’s atmosphere.
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