According to this, this paper focuses on the study of bearings-only passive tracking system in the aspects of the target location, time alignment and nonlinear filtering algorithm.
基于这样的背景，本文从目标定位、时间配准和非线性滤波算法三个方面对多站纯方位被动跟踪系统进行了研究和算法改进。
This article states the principle of passive time difference tracker which is used for the fast location to target.
为使反辐射技术对目标进行快速定位，研制了无源时差跟踪器。
Passive location techniques realized by using electromagnetic waves emitted by the target or other sources.
无源定位技术是利用目标自身辐射的信号或利用他源信息进行定位的方法。
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