建立了多部雷达情况下的系统误差观测模型,分析了系统的可观测度,得出可观测度不一定随观测数据的增多而增强的结论。在此基础上,通过数据筛选的方法,可以获得一个使系统可观测度增大的观测子集,用于误差估计。实验结果表明,使用本文的方法,可确保估计算法的有效性 The system error observation model with multiple radars is established and the observability of the system is analyzed. It is concluded that the observable degree does not necessarily increase with the increase of the observed data. On this basis, through the data screening method, we can get a subset of observations that make the observability of the system increase, which is used to estimate the error. Experimental results show that the proposed method can ensure the validity of the estimation algorithm