This thesis firstly establishes error distribution model of radar measurement and aircraft close approach probability model and then improves the EVENT model according to the radar control system features to build up radar horizontal separation model. 雷达精度与飞行安全方面,本文首先建立了雷达测量误差模型和航空器近距离进近概率模型,然后根据雷达管制自身特点对EVENT模型进行了改进,建立了雷达水平间隔模型。