The global oscillation network group (GONG) project

Details The global oscillation network group (GONG) project The global oscillation network group (GONG) project

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999adspr..24..173l&link_type=abstract

Advances in Space Research, Volume 24, Issue 2, p. 173-176.

Physics

10

Scientific paper

The Global Oscillation Network Group (GONG) is an international, community-based project to conduct a detailed study of solar internal structure and dynamics using helioseismology. In order to exploit this technique, GONG has developed a network of six extremely sensitive and stable solar velocity imagers to obtain nearly continuous observations of the Sun's ``five-minute'' oscillations. GONG also provides magnetograms nominally every twenty minutes. The system became operational in October 1995, and will operate for an eleven-year solar cycle. The observation duty cycle has averaged about 90%, and single-site data loss due to instrument down time is less than 2%. Data is processed at pace with the collection rate. Progress is underway to replace the original 256 × 242 rectangular pixel cameras, with 1024 × 1024 square pixels cameras to obtain the optimal scientific return from the instruments from the eleven-year run. There are 175 individual members of the GONG, from 70 different institutions, and 20 nations.

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