Laser & Optoelectronics Progress, Volume. 56, Issue 1, 011204(2019)

Time Synchronization in Laser Ranging with Multi-Receiving Telescopes Based on Fiber-Time-Frequency Transfer

Haifeng Zhang1,2、*, Huarong Deng1, Mingliang Long1, Zhien Cheng1, Zhongping Zhang1,2, Gang Zhao1, and Jialiang Wang3
Author Affiliations
  • 1 Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China
  • 2 Key Laboratory of Space Object and Debris Observation, Chinese Academy of Sciences, Nanjing, Jiangsu 210008, China
  • 3 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
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    The number of laser echoes can be obviously increased with multi-receiving telescopes to simultaneously receive signals, and the detection ability of target laser signals can be enhanced. However, the precision of time and frequency synchronization directly influences the errors of laser ranging data by means of multi-receiving telescopes. Thus the time and frequency synchronization method for the laser ranging system with multi-receiving telescopes is described based on fiber-time-frequency transfer. The performance of a fiber-time-frequency transfer device is tested and the results show that its time synchronization precision is 62 ps and the linear slope is 4 ps a day, which meet the requirements of laser ranging to satellites. The experiments of laser ranging to satellites are performed with single-transmitting telescope and dual-receiving telescopes based on the laser ranging system with dual-receiving telescopes and the fiber-time-frequency transfer device. Compared with that of the precise orbits of satellites, the error of ranging data derived from the dual-receiving telescopes is less than 6 cm, indicating that it can be used for the precise orbit determination of satellites. Moreover, the experimental results confirm the application feasibility of the fiber-time-frequency transfer method in laser ranging with multi-receiving telescopes.

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    Haifeng Zhang, Huarong Deng, Mingliang Long, Zhien Cheng, Zhongping Zhang, Gang Zhao, Jialiang Wang. Time Synchronization in Laser Ranging with Multi-Receiving Telescopes Based on Fiber-Time-Frequency Transfer[J]. Laser & Optoelectronics Progress, 2019, 56(1): 011204

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    Paper Information

    Category: Instrumentation, Measurement and Metrology

    Received: Jun. 7, 2018

    Accepted: Jul. 20, 2018

    Published Online: Aug. 1, 2019

    The Author Email: Zhang Haifeng (hfzhang@shao.ac.cn)

    DOI:10.3788/LOP56.011204

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