Journal of the Korean Society of Earth Science Education (대한지구과학교육학회지)
- Volume 5 Issue 2
- /
- Pages.139-147
- /
- 2012
- /
- 2005-5668(pISSN)
- /
- 2289-0386(eISSN)
DOI QR Code
Modern Reformation of So-ganui Invented during King Sejong Period and It's Altitude and Azimuth of the Sun Observations
세종시대 창제된 소간의(小簡儀)의 현대적 개조와 태양의 고도 및 방위각 관측
- Choi, Hyun-Dong (Seoul Daebang Elementary School) ;
- Kim, Chil-Young (Kongju National University)
- Received : 2012.02.20
- Accepted : 2012.04.12
- Published : 2012.08.30
Abstract
The purpose of this study was to explain how extraordinary the scientific technology or our ancestor was from the modern perspective by remodeling the most unique astronomical instrument, So-ganui (小簡儀), developed in the Sejong Period (世宗時代) after being examined with contemporary and the principles of the science and observational technology would be properly understood and measured directly. When measuring the altitude of the sun and azimuth using So-ganui, it was adjusted with the horizontal coordinate system and measured using Jipyeonghwan (地平環), Ipeunhwan (立運環) and Guyhyeong (窺衡). Based such measuring principles, the measurement accuracy proposed using So-ganui are as follows. The remodeled So-ganui produced approximately