中文

Journal of Applied Sciences ›› 2019, Vol. 37 ›› Issue (6): 825-834.doi: 10.3969/j.issn.0255-8297.2019.06.007

• Signal and Information Processing • Previous Articles     Next Articles

Satellite Time Autonomous Integrity Monitoring Technology Based on Inter-satellite Link

CHEN Tingting1,2,3,4, LIN Baojun3,4, GONG Wenbin3, FENG Lei3, CHANG Jiachao3, LIN Xia3   

  1. 1. Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;
    2. School of Information Science and Technology, ShanghaiTech University, Shanghai 201210, China;
    3. Innovation Academy for Microsatellites of CAS, Shanghai 200120, China;
    4. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-01-14 Revised:2019-04-22 Online:2019-11-30 Published:2019-12-06

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Abstract: In view of the fact that the Beidou satellite system is difficult to deploy globally, this paper proposes an autonomous integrity detection method using Kalman filter based on satellite time. A model of atomic clock and time-frequency system is established to analyze errors in inter-satellite measurement data using real in-orbit data of Beidou. Time information is calculated from the distance measurement value of inter-satellite link, and relative clock difference is obtained through the ergodic regression calculation, Kalman filter monitoring algorithm is designed to monitor phase hopping and frequency hopping. Through simulation, monitoring performance of Kalman filter for the phase jump and frequency jump of Beidou satellite in the real inter-orbit link ranging value is analyzed. And according to the range of the abnormal jump, a suitable detection threshold is put forward for engineering practice.

Key words: inter-satellite link, telemetry data, Kalman filter, satellite time, integrity monitoring

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