Hemispheric sunspot numbers ${R_{n}}$ and ${R_{s}}$ from 1945–2004: catalogue and N-S asymmetry analysis for solar cycles 18–23
نویسندگان
چکیده
منابع مشابه
Hemispheric Sunspot Numbers Rn and Rs: Catalogue and N-S asymmetry analysis
Sunspot drawings are provided on a regular basis at the Kanzelhöhe Solar Observatory, Austria, and the derived relative sunspot numbers are reported to the Sunspot Index Data Center in Brussels. From the daily sunspot drawings, we derived the northern, Rn, and southern, Rs, relative sunspot numbers for the time span 1975– 2000. In order to accord with the International Sunspot Numbers Ri, the R...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2006
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20054060