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《Journal of Astronautics》 2009-01
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The Crucial Experiment for Checking Einstein's Postulate of the Constancy of the Speed of Light

LIN Jin1,LI Zhi-gang2,FEI Jing-gao3,HU De-feng4(1.China Academy of Launch Vehicle Technology,Beijing 100854,China;2.China National Time Service Center,Xi'an 710600,China;3.China Aerospace Engineering Consultation Center,Beijing 100048,China;4.China Academy of Launch Vehicle Technology,Beijing 100854,China)  
The crucial experiment for checking Einstein's postulate of the constancy of the speed of light was performed at the high precision TWSTT(Two Way Satellite Time Transfer) facility of the National Time Service Center,Chinese Academy of Sciences.The principle of the crucial experiment was based on the principle of special relativity and the definition of simultaneity by means of one way light signal.By comparison the measurement mechanisms of one way light signal simultaneity and "to-and-fro" two way light signal simultaneity,the principle of the crucial experiment has proved: if there exists relative motion,the "uplink" and "downlink" light signal passage times of the "to-and-fro" two way light signal are not equal.The cesium atomic clocks at Xian station and Urumuqi station transferred and exchanged pps time signals via Sino satellite and China Sat-1 satellite.The observation uncertainty is the order of 0.01 ns.The observed data have proved the equality tB-tA=t'A-tB,which was introduced by definition in Einstein's 1905 paper,is not valid in case if there exists relative motion between A and B.
【CateGory Index】: O412.1
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