Astronomical Calendar and Restoration Design of Clepsydra in the Silla era

Details Astronomical Calendar and Restoration Design of Clepsydra in the Silla era Astronomical Calendar and Restoration Design of Clepsydra in the Silla era

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jass...25..299l&link_type=abstract

Journal of Astronomy and Space Sciences. Vol. 25, no. 3, 299-320

Astronomy and Astrophysics

Astronomy

Silla, Calendaric System, Water Clock

Scientific paper

We study on the astronomical calendars that was used in the Silla era. The calendars are deduced from the records in Samguksagi. They were influenced from calendaric system of Tang Dynasty, which are Lin duk calendar(?), Ta yen calendar(?) and Sun myung calendar(?). We analyse them in detail according to the time and duration of use. Water clock system of Unified Silla was used four water vessels for supplying water. We found the model from documents on ancient water clock that are appeared in the old Korean, Chinese and Japanese historical records. We have assumed the model of Unified Silla clepsydra is similar type with Chinese records during Tang dynasty and with Japanese reconstructed water clock in Temple Asoka. After fluid dynamic experiment, we decide the suitable diameter of supplying pipe and volume of the vessels used in the clepsydra. We introduce the experimental instruments and methods for accomplishing the clock. We designed and reconstructed the water clock of Unified Silla and float rods for measuring time, that is based on the Silla's calendaric system.

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