far field approximation的意思|示意

A backscatter model was developed for measuring wind field with far-field approximation method.

提出了一种基于远场近似法建立的大气风场测量散射模型。

The expression of complex amplitude is given in reference plane vertical to the optical axis by far-field approximation when the line source and the principal axis are at any Angle.

在柱坐标下从微分波动方程出发，推导柱面光波的场分布，并利用远场近似条件导出当线光源与光轴成任意角度时，在垂直光轴方向的参考面上的复振幅表示。

By using the reconstructed far-field approximation space covariance matrix at the same bearings from the revised near-field space covariance matrix, the bearings of multiple sources can be obtained.

通过对近场空间协方差矩阵进行修正，用重构在相同方位上的远场近似空间协方差矩阵确定声源方位角。

Taking Gaussian beam as example, Integral method and Localized Approximation for BSC's is discussed. Finally the far-field scattered intensity is simulated. 6.

同时以高斯波束为例，给出了波束因子的主要计算方法：积分法和区域近似法。