Sentences with phrase «ionospheric research instrument»
Its Ionospheric Research Instrument (IRI) puts out a maximum of 3.6 megawatts sending signals at 2.8 to 10 MHz — powerful enough heat up a small (on a global scale) but measurable part of the ionosphere.
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Just north of the Arctic Circle on Greenland's west coast the dancing «northern lights» offer the perfect backdrop to the antenna of the Sondrestrom Upper Atmospheric Research Facility's centerpiece instrument — the ionospheric radar system.