我从50年代初就开始从事时间测量现代化工作.前期的工作主要是提高世界时的测量精度.世界时的测定是以恒星位置依据来确定地球自转瞬间的角位置.近一个世纪来,为提高测定恒星的精度,国外科学家在仪器上和方法上均付出了巨大努力,但提高精度不太理想,其中主要问题是观测一组星的内部精度要比组与组之间的精度高2—3倍,而总的观测精度并不太高,这已成了提高测时精度的主要障碍.我分析了一个地方不同观测仪器的观 I have been engaged in the work of time measurement and modernization since the early 1950s, and my previous work mainly focused on improving the measurement accuracy of the world. The determination of the world time is based on the position of the star to determine the angular position of the Earth’s rotation moment. For nearly a century, Determining the accuracy of a star, foreign scientists have made great efforts on the instrument and method, but to improve the accuracy is not ideal, the main problem is the observation of a group of stars than the internal precision of the group than the high precision 2-3 Times, and the total observation accuracy is not too high, which has become a major obstacle to improve the accuracy of measurement.I analyzed the concept of different observation instruments in one place