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本文根据微分几何原理，导出了与导弹头并形的旋转抛物面上绕射场的UTD参数的计算公式。通过拟椭球积分得到了旋转抛物面上短程线的解析式，避免了数值方法射线寻迹的复杂性，同时简化了UTD参数的计算。这些公式是UTD法计算并形阵的辐射特性和耦合特性时所必需的。
Based on the principle of differential geometry, this paper deduces the formula of UTD parameter of the diffraction field of the paraboloid rotating parallel to the missile head. The analytic formula of the geodesic on the paraboloid of revolution is obtained by the quasi- ellipsoidal integral, which avoids the complexity of the ray tracing by the numerical method and simplifies the calculation of the UTD parameters. These formulas are necessary for the UTD method to calculate the radiation characteristics and coupling characteristics of a matrix.