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S1

S1 has an exact 24-hour period but is mostly a radiational, land-sea-breeze signal, so a year of data is needed before it can be trusted apart from K1.

Angular speed

15 °/h

Period

24.0 h

Species

diurnal

Origin

solar, largely radiational

Resolvable

≥ 365 days

Back to the table. Sum these into a curve. Data: /api/constituents.json