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本文提出以如下具有慢时变万差的线性回归－自回归混合模型用于描述跟踪雷达测量误差的变化规律，并提出了模型个数的估计方法．数值例子表明，本文提出的模型能较好地拟合跟踪雷达误差数据．
In this paper, we propose a linear regression-autoregressive hybrid model with slow time-varying variability to describe the variation of tracking radar measurement errors and propose a method to estimate the number of models. The numerical examples show that the proposed model can well fit the tracking radar error data.