Laser & Optoelectronics Progress, Volume. 56, Issue 1, 011204(2019)
Time Synchronization in Laser Ranging with Multi-Receiving Telescopes Based on Fiber-Time-Frequency Transfer
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
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)