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Proceedings Paper

The synchronization method for distributed small satellite SAR
Author(s): Lei Xing; Xiaochun Gong; Wenxun Qiu; Zhaowei Sun
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Paper Abstract

One of critical requirement for distributed small satellite SAR is the trigger time precision when all satellites turning on radar loads. This trigger operation is controlled by a dedicated communication tool or GPS system. In this paper a hardware platform is proposed which has integrated navigation, attitude control, and data handling system together. Based on it, a probabilistic synchronization method is proposed for SAR time precision requirement with ring architecture. To simplify design of transceiver, half-duplex communication way is used in this method. Research shows that time precision is relevant to relative frequency drift rate, satellite number, retry times, read error and round delay length. Installed with crystal oscillator short-term stability 10-11 magnitude, this platform can achieve and maintain nanosecond order time error with a typical three satellites formation experiment during whole operating process.

Paper Details

Date Published: 10 November 2007
PDF: 6 pages
Proc. SPIE 6795, Second International Conference on Space Information Technology, 67953Z (10 November 2007); doi: 10.1117/12.775017
Show Author Affiliations
Lei Xing, Harbin Institute of Technology (China)
Xiaochun Gong, Harbin Institute of Technology (China)
Wenxun Qiu, Harbin Institute of Technology (China)
Zhaowei Sun, Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 6795:
Second International Conference on Space Information Technology

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