Abstract
In ancient and medieval China,1 astronomers always made use of a gnomon to measure the solar motion. Calendar-makers usually gave lengths of the solar shadow at noon on the days of 24 solar seasons (qi) a in their calendar-making system.2 Those data were measured at the Imperial Observatory.
Research supported by a special fund of the Education Section of Shaanxi Province, and the China Scholarship Council (97861043).
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© 2002 Springer Science+Business Media Dordrecht
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Anjing, Q. (2002). Revisiting An Eighth-Century Chinese Table of Tangents. In: Ansari, S.M.R. (eds) History of Oriental Astronomy. Astrophysics and Space Science Library, vol 275. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9862-0_17
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DOI: https://doi.org/10.1007/978-94-015-9862-0_17
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