The Global Oscillation Network Group (GONG) Project

@article{Harvey1996TheGO,
  title={The Global Oscillation Network Group (GONG) Project},
  author={J. W. Harvey and Frank Hill and Robert P. Hubbard and James R. Kennedy and John Leibacher and James A. Pintar and Peter A. Gilman and Robert W. Noyes and A. M. Title and J. Toomre and Roger K. Ulrich and Arvind Bhatnagar and John A. Kennewell and William M. Marquette and J. Patr{\'o}n and Oscar Sa{\'a} and E. A. Yasukawa},
  journal={Science},
  year={1996},
  volume={272},
  pages={1284 - 1286}
}
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… 

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The Taiwan Oscillation Network (TON) is a ground-based network to measure solar intensity oscillations to study the internal structure of the Sun. K-line full-disk images of 1000 pixels diameter are

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The Global Oscillation Network Group (GONG) Project is planning to place a set of instruments around the world to observe solar oscillations as continuously as possible for at last three years. The

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The Global Oscillation Network Group (GONG) Project will place a network of instruments around the world to observe solar oscillations as continuously as possible for three years. The Project has now

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For readers who were not doing astronomy three decades ago, the contrast between then and now is hard to appreciate. Before the appearance of the epochal papers of Leighton et al. and of Ulrich, no

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