Yearly mean total Group Number

Time range: 1700 - last elapsed year

Data description:
Yearly mean total Group Number obtained by taking a simple arithmetic mean of the daily total sunspot number over all days of each year. (NB: in early years in particular before 1749, the means are computed on only a fraction of the days in each year because on many days, no observation is available).

"No data" is indicated by a -1 value.
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TXT
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Filename: GN_y_tot_V2.0.txt
Format: plain ASCII text

Contents:
Column 1: Gregorian calendar year (mid-year date)
Column 2: Yearly mean group number.
Column 3: Standard error on the yearly mean
Column 4: Number of observations (not available yet)
Column 5: Definitive/provisional marker. * indicates provisional values

Line format [character position]:
- [1-6] Year (decimal)
- [9-13] Yearly mean group number
- [15-19] Standard deviation
- [22-26] Number of observations
- [28] Definitive/provisional indicator

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CSV
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Filename: GN_y_tot_V2.0.csv
Format: Comma Separated values (adapted for import in spreadsheets)
The separator is the semicolon ';'.

Contents:
Column 1: Gregorian calendar year (mid-year date)
Column 2: Yearly mean group number.
Column 3: Standard error on the yearly mean.
Column 4: Number of observations (not available yet).
Column 5: Definitive/provisional marker. '1' indicates that the value is definitive. '0' indicates that the value is still provisional.