Byte-by-byte Description of file: CatalogueB.txt
| Bytes | Format | Units | Label | Explanations |
| 1-7 | A7 | "YYYY/MM" | Date | Date of Calculated Values |
| 8-12 | F5.1 | monthlyn | Monthly northern Sunspot Numbers | |
| 13-17 | F5.1 | monthlys | Monthly southern Sunspot Numbers | |
| 18-22 | F5.1 | monthlyn_smooth | Smoothed northern Sunspot Numbers | |
| 23-27 | F5.1 | monthlys_smooth | Smoothed southern Sunspot Numbers | |
| 28-32 | F5.1 | monthlyn_area |
Monthly northern Sunspot Numbers reconstructed from Sunspot Area (1874-05 to 2016-09)
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| 33-37 | F5.1 | monthlys_area |
Monthly southern Sunspot Numbers reconstructed from Sunspot Area (1874-05 to 2016-09)
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| 38-42 | F5.1 | monthlyn_area_s |
Smoothed northern Sunspot Numbers reconstructed from Sunspot Area (1874-05 to 2016-09)
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| 43-47 | F5.1 | monthlys_area_s |
Smoothed southern Sunspot Numbers reconstructed from Sunspot Area (1874-05 to 2016-09)
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| 48-52 | F5.1 | monthly_n_t06 |
Monthly northern Sunspot Numbers recalibrated from Temmer et al(2006) (1945-01 to 2004-12)
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| 53-57 | F5.1 | monthly_s_t06 |
Monthly southern Sunspot Numbers recalibrated from Temmer et al(2006) (1945-01 to 2004-12)
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| 58-62 | F5.1 | monthly_n_t06_s |
Smoothed northern Sunspot Numbers recalibrated from Temmer et al(2006) (1945-01 to 2004-12)
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| 63-67 | F5.1 | monthly_s_t06_s |
Smoothed southern Sunspot Numbers recalibrated from Temmer et al(2006) (1945-01 to 2004-12)
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| 68-72 | F5.1 | monthly_n_sil |
Monthly northern Sunspot Numbers from SILSO (1992-01 to 2020-10)
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| 73-77 | F5.1 | monthly_s_sil |
Monthly southern Sunspot Numbers from SILSO (1992-01 to 2020-10)
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| 78-82 | F5.1 | monthly_n_sil_s |
Smoothed northern Sunspot Numbers from SILSO (1992-01 to 2020-10)
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| 83-87 | F5.1 | monthly_s_sil_s |
Smoothed southern Sunspot Numbers from SILSO (1992-01 to 2020-10)
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