【摘要】 对国际原子时(TAI),地球力学时(TDT)和质心力学时(TDB)的定义和概念作了回顾和阐述。对其中一些有争议的问题进行了介绍和讨论。我们认为,TAI的建立应当与地心坐标系的选择有关,而把TDT看为是在去除地心引力的虚拟时空中的地心处的原时比较恰当。更多还原

【Abstract】 This paper reviews the definition and conception of TAI, TDT and TDB, introduces and discusses some problems which are disputed recently among astronomers and physicists. We think, the construction of TAI should depend on the choice of geocentric coordinate System and TDT should be considered as the proper time at geocentre in a fictitious spacetime when the gravitation of the earth were removed.更多还原