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Note: Inter-satellite laser range-rate measurement by using digital phase locked loop

作者： 来源：叶贤基 发布时间：2015年02月03日 00:00 点击次数：[]

Rev. Sci. Instrum.  86, 016106 (2015); doi: 10.1063/1.4905579 (Download PDF)
Yu-Rong Liang1,2, Hui-Zong Duan1, Xin-Long Xiao1, Bing-Bing Wei1 and Hsien-Chi Yeh1,a)
    1 MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, 1037 Luo Yu Road, Wuhan 430074, People’s Republic of China
    2 Department of Electronics and Information Engineering, Huazhong University of Science and Technology, 1037 Luo Yu Road, Wuhan 430074, People’s Republic of China
    a) yexianji@hust.edu.cn
     
    ABSTRACT

    This note presents an improved high-resolution frequency measurement system dedicated for the inter-satellite range-rate monitoring that could be used in the future’s gravity recovery mission. We set up a simplified common signal test instead of the three frequencies test. The experimental results show that the dominant noises are the sampling time jitter and the thermal drift of electronic components, which can be reduced by using the pilot-tone correction and passive thermal control. The improved noise level is about 10−8 Hz/Hz1/2@0.01Hz, limited by the signal-to-noise ratio of the sampling circuit.