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Solar Physics

, Volume 224, Issue 1–2, pp 113–120 | Cite as

The Sidc: World Data Center for the Sunspot Index

  • P. Vanlommel
  • P. Cugnon
  • R. A. M. Van Der Linden
  • D. Berghmans
  • F. Clette
Article

Abstract

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.

Keywords

Sunspot Number World Data Royal Observatory Solar Influence Influence Data 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Springer Science + Business Media, Inc. 2004

Authors and Affiliations

  • P. Vanlommel
    • 1
  • P. Cugnon
    • 1
  • R. A. M. Van Der Linden
    • 1
  • D. Berghmans
    • 1
  • F. Clette
    • 1
  1. 1.SIDC-Royal Observatory of BelgiumBrusselsBelgium

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