This paper proposes a space target filtering algorithm based on velocity measurement of netted radar sys-tems including three radars.First,the true velocity vector of a target is calculated in the rectangular coordinate sys-tem by using the velocity vector decomposition method.In addition,the necessary conditions for applying the veloc-ity vector decomposition method to obtain the true velocity vector are discussed.Secondly,extended Kalman filte-ring is used to improve the position accuracy and velocity accuracy of the target.The scenario in which more than three radars are netted is also analyzed.The simulation results show that the proposed method has higher filtering accuracy than that of the radial velocity based single radar filtering method under target maneuvering and low SNR conditions.
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