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导航卫星信号经由空间飞行器后将发生反射与散射,此信号对于飞行器自身的定位通常作为多径信号被消除。利用双基无源雷达的概念,提出利用该信号实现空间飞行器的远程定位方法。该方法充分利用空间飞行器对于导航卫星信号的反射与散射,在地面/空中设置可以接收此反射信号的接收机,从而实现飞行器的探测。接收机利用码延迟锁定环路实现直射信号与反射信号的锁定,并通过求解直射信号与反射信号的相关功率获得其路径差,进而计算出空间飞行器的位置。介绍了利用延迟映射接收机(DMR)探测空间飞行器的系统组成,并给出了远程定位的数学模型、关键技术分析、DMR的设计原理及验证实验,实验结果表明所设计的DMR可以有效地接收到导航卫星反射信号。为空间飞行器的探测提供了一种新型的手段。
The navigation satellite signal will reflect and scatter after passing through the spacecraft. The localization of this signal to the aircraft itself is usually eliminated as a multipath signal. Based on the concept of bistatic passive radar, a remote location method of spacecraft using the signal is proposed. The method takes full advantage of the spacecraft’s reflection and scattering of the navigation satellite signals and sets the receiver on the ground / sky to receive the reflected signals so as to realize the detection of the aircraft. The receiver locks the direct signal and the reflected signal by using the code delay locked loop, and obtains the path difference by solving the correlation power between the direct signal and the reflected signal, and then calculates the position of the space vehicle. This paper introduces the system configuration of spacecraft using delay map receiver (DMR) and presents the mathematical model of remote location, key technology analysis, design principle of DMR and verification experiment. The experimental results show that the designed DMR can effectively receive To navigation satellite reflection signal. It provides a new method for the exploration of spacecraft.