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Published May 31, 1996 | public
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The Global Oscillation Network Group (GONG) Project

Harvey, J. W.
Hill, F.
Hubbard, R. P.
Kennedy, J. R.
Leibacher, J. W.
Pintar, J. A.
Gilman, P. A.
Noyes, R. W.
Title, A. M.
Toomre, J.
Ulrich, R. K.
Bhatnagar, A.
Kennewell, J. A.
Marquette, W.
Patrón, J.
Saá, O.
Yasukawa, E.
An error occurred while generating the citation.

Abstract

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.

Additional Information

© 1996 American Association for the Advancement of Science. 18 March 1996; Accepted 6 May 1996. The GONG project is managed by the National Solar Observatory, a Division of the National Optical Astronomy Observatories, which is operated by the Association of Universities for Research in Astronomy under a cooperative agreement with NSF.

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August 18, 2023
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October 19, 2023