Analysis and correction to the influence of satellite motion on the measurement of inter-satellite two-way clock offset

• Published in: EURASIP journal on wireless communications and networking 2019-01, Vol.2019 (1), p.1-7, Article 3
• Main Authors: Huang, Feijiang, Chen, Yanyu, Li, Tinghui, Shan, Qingxiao, Zhang, Junjun, Cai, Chenglin
• Format: Article
• Language: English
• Subjects: Clock offset measurement; Communications Engineering; Emerging Intelligent Algorithms for Edge-of-Things Computing; Engineering; Error analysis; Error correction; Influence; Information Systems Applications (incl.Internet); Networks; Polynomials; Satellite communication; Satellite constellation; Satellite motion; Signal,Image and Speech Processing; Time synchronization
• ISSN: 1687-1499; 1687-1472; 1687-1499
• DOI: 10.1186/s13638-018-1333-9

Aiming at the influence of satellite motion on the inter-satellite two-way clock offset measurement, this paper proposed a correction method to eliminate the influence of satellite motion. Firstly, the measuring principle for the inter-satellite two-way clock offset was offered, and then specific influences of satellite motion on the measurement of inter-satellite two-way clock offset were analyzed in details when the mutual closing and far-away motions were conducted among the satellites. Finally, this paper integrated the specific influences of two motions on the measurement of inter-satellite clock offset, and put forward the correction method of inter-satellite clock offset with the smallest error after the polynomial fitting of measured clock offset. Satellite tool kit (STK) was used for the simulation of two-way clock offset measurement, and the result indicated that the accuracy of measurement for the inter-satellite clock offset with the length of 8 min containing the simulation error was better than 1 ns. The clock offset correction method can be used for the autonomous and high-accuracy measurement of inter-satellite clock offset.