大气波导 meaning in English
atmospheric duct
tropospheric duct
Examples
- Evaporation ducts , or tropospheric ducts in general , can guide radio waves to distances far beyond the horizon with less attenuation , and then severely impair some certain radio wave system
以蒸发波导为代表的对流层大气波导传播，可使电波在较小的衰减下沿波导传播得很远，从而严重影响合适的无线电系统。 - According to state - of - the - art of evaporation duct propagation research , and to meet the demands on the prediction techniques of evaporation duct environment and the assessment of radar performance under evaporation duct environment , this dissertation gives a thorough research in depth on the subject described above . the researches include the prediction theory of evaporation duct and its applications , the theory of ray tracing based on which the prediction of radio wave rays are conducted and its application to the predicting of radar range performance under a given evaporation duct , and the characteristics of tropospheric ducts over china
根据上述情况，结合我国尽快得到蒸发波导环境预测技术及在其中运作无线电系统的性能预测技术等需求，本文针对蒸发波导传播及其相关应用这一热点难点问题较深入地研究了蒸发波导环境预测技术的理论及其应用、蒸发波导环境中雷达探测性能评估所要求的基本理论之一? ?射线描迹技术及其在代表性蒸发波导环境中雷达探测性能评估技术方面的应用和我国应用所需的我国大气波导环境特性等几个方面。 - In order to utilize the atmospheric duct phenomena , and to make the electronic reconnaissance facilities more effective and the status of battlefield more advantageous , on the basis of classification of the atmospheric duct , first the model for evaluating the effective detective zone of electronic reconnaissance facility is established , then the numerical value simulation method of electromagnetic wave propagation under the condition of surface duct calculated with parabolic equation and fourier arithmetic is presented , and finally the influences of atmospheric duct on electronic reconnaissance facility is analyzed
为充分利用大气波导条件，发挥电子侦察设备效能，使战场态势向有利于己方方向转化，在介绍大气波导分类的基础上，建立评估电子侦察设备的有效探测区的模型，给出用抛物线方程及其分布傅里叶算法计算电磁波在表面波导条件下传播的数值模拟方法，并分析了大气波导对电子侦察设备的影响情况。 - This means that the dielectric property changes with height and allows a slight increase in the speed of a radio wave as we move upwards through the atmosphere . this in turn means that if a radio wave moves away from the earth at an angle less than 90 degrees , then the upper part of the wave travels faster than the lower part . therefore even under normal conditions this can in effect bend , or refract , the wave back down to earth
其中一种显著的现象是：在一定的气象条件下，在大气边界层尤其是在近地层中传播的电磁波，受大气折射的影响，其传播轨迹弯向地面，当曲率超过地球表面曲率时，电磁波会部分地被陷获在一定厚度的大气薄层内，就好像电磁波在金属波导管中传播一样，称为大气波导传播，形成波导传播的大气薄层称为大气波导层。