Observational accuracy of sunrise and sunset times in the sixth century China
文献类型：期刊论文
| 作者 | Li, Yong
|
| 刊名 | CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2006 |
| 卷号 | 6期号:5页码:629-634 |
| 关键词 | History Of Astronomy Astrometry Solar-terrestrial Relations Methods : Statistical |
| 英文摘要 | The Daye Calendar was compiled in AD 597 in the Sui Dynasty. We investigate the records of sunrise and sunset times on the 24 solar-term days in the calendar. By converting the ancient Chinese time units, Chen, Ke and Fen to hour, minute and second, and carrying out a comparison between the ancient records and values computed with modem astronomical theory, we find that the accuracy of solar measurements in the Sui period is remarkably high: for sunrise times, the average absolute deviation is 3.63 min (this value can be further reduced to 3.03 min when erroneous data are excluded), and for sunset times it is 3.48 min. We also find that the observed sunrise and sunset times are strictly symmetrically distributed with respect to both the Winter Solstice and the Summer Solstice, with their deviations showing a similar symmetrical distribution as well. We give a discussion on the date of observation, the feature of the data, and possible reasons of the deviation. |
| 语种 | 英语 |
| WOS记录号 | WOS:000241487800016 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8940]  |
| 专题 | 国家天文台_应用天文研究部 |
| 作者单位 | Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Yong. Observational accuracy of sunrise and sunset times in the sixth century China[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2006,6(5):629-634. |
| APA | Li, Yong.(2006).Observational accuracy of sunrise and sunset times in the sixth century China.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,6(5),629-634. |
| MLA | Li, Yong."Observational accuracy of sunrise and sunset times in the sixth century China".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 6.5(2006):629-634. |
入库方式： OAI收割
来源：国家天文台
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