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Based on monitoring and tracking the maritime maneuvering target, the passive tracking system of space-based bearing-only measurement is constructed. Due to the strong maneuverability of target and strong nonlinearity of tracking system, an algorithm based on Bayes estimation is introduced in the interacting multiple model (IMM). By deriving the equivalent description of IMM's covariance matrix in SCKF (Square-root Cubature Kalman Filter), this paper solves the problem of mismatch between the input and output of the two algorithms, and a new algorithm flowchart is proposed. The simulation results show that the proposed algorithm can adapt to the maneuverability quickly and estimate the probability of target motion model accurately. To be more accurately, the average position and speed tracking accuracy can reach 53.79m and 1.54m / s respectively, which verifies the effectiveness of the proposed algorithm.

Marine Maneuvering Target Tracking Based on Space-Based Bearing-Only Measurement