The synchronization method for distributed small satellite SAR

Lei Xing; Xiaochun Gong; Wenxun Qiu; Zhaowei Sun

doi:10.1117/12.775017

10 November 2007 The synchronization method for distributed small satellite SAR

Lei Xing, Xiaochun Gong, Wenxun Qiu, Zhaowei Sun

Proceedings Volume 6795, Second International Conference on Space Information Technology; 67953Z (2007) https://doi.org/10.1117/12.775017
Event: Second International Conference on Spatial Information Technology, 2007, Wuhan, China

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.

Citation Download Citation

Lei Xing, Xiaochun Gong, Wenxun Qiu, and Zhaowei Sun "The synchronization method for distributed small satellite SAR", Proc. SPIE 6795, Second International Conference on Space Information Technology, 67953Z (10 November 2007); https://doi.org/10.1117/12.775017

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