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HAARP Induction Magnetometer
The induction magnetometer detects temporal variation of the geomagnetic field based on Faraday's law of magnetic induction. This instrument, which was provided by the University of Tokyo, is composed of three individual sensors. Each sensor is comprised of a large number of turns of fine copper wire wound around a rod with high magnetic permeability. (See a photograph of the sensor and its construction.) The sensitivity of each sensor is determined by the effective area of the detection coil, that is, the cross sectional area of each winding, and the number of turns, and by magnetic flux density threading the coil. The magnetic flux density is enhanced by a factor of approximately 1,000 by the high-permeability metal core.
Quel grafico che vedete è la misurazione che il magnetometro di HAARP fa del campo magnetico, è una ricezione, non una emissione