INTRODUCTION

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<正> The Shaanxi Astronomical Observatory(SAO)of the ChineseAcademy of Sciences is engaged in research on time and frequencyas well as relevant theories and applications.The principal respon-sibilities of the SAO is to develop and maintain an independentAtomic Time Scale,to determine the Universal Time by means ofastronomical observations,and to broadcast standard time andfrequency from BPL and BPM stations at LF and HF,respectively.In addition,SAO carries out investigation on time......(本文共计1页)       [继续阅读本文]