NDLI: Algorithm of intersatellite dynamic two-way time transfer based on GEO satellite

Content Provider	IEEE Xplore Digital Library
Author	Feijiang Huang Xiaochun Lu Haitao Wu Yujing Bian Hang Zhao
Copyright Year	2009
Description	Author affiliation: National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China (Feijiang Huang; Xiaochun Lu; Haitao Wu; Yujing Bian; Hang Zhao)
Abstract	Two-way time transfer is a common method applied to spacecrafts and ground stations to carry out time transfer. This method improved the accuracy of time transfer by eliminating the impact of propagation paths and extra delay caused by atmosphere, so the algorithm of two-way satellite time transfer is presently one of the time transfer methods with high accuracy. But this method requires the spacecrafts and ground stations, on which time transfer is to be performed, to keep a relatively static state in time transfer. So it is mainly used in GEO satellites for satellite-ground two-way time transfer. On the basis of two-way satellite time transfer algorithm, the characteristics of the propagation delay of two-way time transfer signals between MEO satellite and GEO satellite varying with intersatellite range were analyzed, and the rule of intersatellite clock offset varying with intersatellite range obtained with this algorithm was deduced. This paper presents a dynamic two-way time transfer algorithm(DTWTTA) with which high-accuracy intersatellite clock offset is solved through the combination of intersatellite pseudo-range polynomial fitting and clock-offset polynomial fitting. Simulation data of actual satellites showed that with the algorithm the intersatellite time transfer error can be controlled within 5ns provided with minimum square fitting, the two-way time transfer periods beginning at moments basically symmetrical with the occurrence of minimum intersatellite range relatively, and the impact of other factors being taken into account. As a result the algorithm can be used for intersatellite high-accuracy time transfer.
Starting Page	688
Ending Page	691
File Size	542324
Page Count	4
File Format	PDF
ISBN	9781424435111
ISSN	10756787
DOI	10.1109/FREQ.2009.5168271
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-04-20
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Heuristic algorithms Clocks Space vehicles Satellite ground stations Propagation delay Polynomials Delay effects Atmosphere Signal analysis Algorithm design and analysis
Content Type	Text
Resource Type	Article

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