探讨了对流层中雷达射线的准确快速描迹技术。和国内一直沿用积分方程进行对流层射线描迹不同，该文基于射线微分方程进行射线描迹，使用了高阶Runge-Kutta数值微分解法，它可避免积分算法计算效率低、零度仰角附近难以计算等方面的局限。模拟结果和已有研究结果的比较表明，该方法可以获得较为理想的准确结果和计算速度。

The technique of ray tracing with high accuracy and efficiency is discussed in this paper. Different from the technique of integral equation used in China to date, the differential equations of electromagnetic wave ray are chosen for ray-tracing, and Runge-Kutta method is used. With the technique, the drawback of integral calculation can be avoided, including the difficulty at low altitudes near zero angle and low computation efficiency. The simulation results and its comparison with that available show that accurate results and fast enough calculation speed can be obtained.

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