The Sidc: World Data Center for the Sunspot Index

Details The Sidc: World Data Center for the Sunspot Index The Sidc: World Data Center for the Sunspot Index

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004soph..224..113v&link_type=abstract

Solar Physics, Volume 224, Issue 1-2, pp. 113-120

Physics

9

Scientific paper

Since January 1981, the Royal Observatory of Belgium (ROB) has operated the Sunspot Index Data Center (SIDC), the World Data Center for the Sunspot Index. From 2000, the SIDC obtained the status of Regional Warning Center (RWC) of the International Space Environment Service (ISES) and became the “Solar Influences Data analysis Center”. As a data analysis service of the Federation of Astronomical and Geophysical data analysis Services (FAGS), the SIDC collects monthly observations from worldwide stations in order to calculate the International Sunspot Number, R i . The center broadcasts the daily, monthly, yearly sunspot numbers, with middle-range predictions (up to 12 months). Since August 1992, hemispheric sunspot numbers are also provided.

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