With the aim of contributing to the calibration of the International Atomic Time Scale (TAI), a cesium atomic fountain frequency standard is developed at the National Metrology Institute of Japan. The short-term stability is measured to be /spl sigma/(/spl tau/)=4.7/spl times/10/sup -13//spl times//spl tau//sup -1/2/ by comparison with a hydrogen maser. Preliminary results of the accuracy evaluation, including measurement of the second-order Zeeman shift, are presented.
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Kurosu et al. (2004) studied this question.
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