VizieR Online Data Catalog: Monthly numbers of sunspot groups 1749-1996 (Usoskin+, 2017)
Abstract
The file contain the monthly numbers of sunspot groups including the fractional year [Y], the Mean value [GM], the low [Gl] and upper [G_u] 1-sigma (68% bounds).
(1 data file).- Publication:
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VizieR Online Data Catalog
- Pub Date:
- March 2017
- Bibcode:
- 2017yCat..36010109U
- Keywords:
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- Sun