Global Oscillations Network Group


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Global Oscillations Network Group

(GONG) A program for the continuous monitoring of solar oscillations (see helioseismology), coordinated by the US National Solar Observatory. Six observatories spaced at approximately 60° intervals of longitude around the world form the observational network.
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Using data from the Global Oscillations Network Group (GONG) and the Michelson Doppler Imager (MDI), scientists from NorthWest Research Associates (NWRA) and the Max-Planck-Institut fur Sonnensystemforschung (MPS) have found detectable signs of magnetic fields before they emerge at the solar surface to form sunspots.
Hathaway and his colleagues made their observations in 1989 and 1991 at the National Solar Observatory facility at Kitt Peak, Ariz., using a prototype of a new filter and telescope system called the Global Oscillations Network Group (GONG).

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