The Global Oscillation Network Group (GONG) Project

Details The Global Oscillation Network Group (GONG) Project The Global Oscillation Network Group (GONG) Project

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996sci...272.1284h&link_type=abstract

Science, Volume 272, Issue 5266, pp. 1284-1286

Computer Science

166

Scientific paper

Helioseismology requires nearly continuous observations of the oscillations of the solar surface for long periods of time in order to obtain precise measurements of the sun's normal modes of oscillation. The GONG project acquires velocity images from a network of six identical instruments distributed around the world. The GONG network began full operation in October 1995. It has achieved a duty cycle of 89 percent and reduced the magnitude of spectral artifacts by a factor of 280 in power, compared with single-site observations. The instrumental noise is less than the observed solar background.

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