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。

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.

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本文从基于质点运动学的单站被动定位跟踪理论出发，介绍在已有的火控雷达本体上增加一套被动定位子系统所构成的单站被动定位跟踪系统。

On the theory of SOPLAT based on particle kinematics, this paper introduces a SOPLAT system made up of a fire control radar and a passive location subsystem.

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