Based on the inertial guidance instrument error model, the model of reentry point's parameters is established in this paper.

基于惯性制导工具误差模型，推导出存在工具误差时的再入点运动参数模型。

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As the main error source of SINS, the errors of inertial instrument must be compensated.

惯性元件误差是捷联惯导系统的主要误差源，必须在导航过程中加以补偿。

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