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- 地方时、UTC、GPST、TAI等的对应关系
- http://leapsecond.com/java/gpsclock.htm
- 测绘英语缩写
- ERP Earth Rotation Parameters(地球自转参数） ITRF The International Terrestrial Reference Frame ITRS The International Terrestrial Reference System
- GPS周、儒略日查询
- http://www.rvdi.com/freebies/gpscalendar.html http://sopac.ucsd.edu/scripts/convertDate.cgi
- 国际科技数据委员会(CODATA)基本物理常数推荐值（2010）
- 热度 1
- CODATA Internationally recommended values of the fundamental physicsl constant 详细网址： http://physics.nist.gov/cuu/Constants/index.html Fundamental Physical Constants — Frequently used constants（2010）
- 秒的国际定义
- http://www.bipm.org/en/CGPM/db/13/1/ SI unit of time (second) * The 13th Conférence Générale des Poids et Mesures (CGPM), considering that the definition of the second adopted by the Comité International des Poids et Mesures (CIPM) in 1956 (Resolution ...
- 光速
- http://www.bipm.org/en/CGPM/db/15/2/ Resolution 2 of the 15th meeting of the CGPM (1975) Recommended value for the speed of light * The 15th Conférence Générale des Poids et Mesures, considering the excellent agreement among the results of wav ...
