Raw data of all the Observers (SN Version 1)
All the raw data from the Mittheilungen for the years 1818-1848.
Columns are detailed in the first lines of the CSV file.
Sunspot Series Version 2.1
Reconstructed SN from 1818-1848 : daily, monthly and yearly values respectively.
Sunspot number V2.1 Daily
Columns are detailed in the first lines of the CSV file
Sunspot number V2.1 Monthly
Columns are detailed in the first lines of the CSV file