| 1. | Analysis of radar detection ability in evaporation duct environment
蒸发波导环境中的雷达探测性能分析 |
| 2. | A method of evaluating radar oth performance in evaporation duct environments
蒸发波导环境下雷达超视距性能评估方法 |
| 3. | So the researches on the characteristics of evaporation duct environment , propagation and its applications have great theoretical significance and are of great value to military
使开展蒸发波导环境特性传播特性及其应用的研究具有重大理论意义和军事价值。 |
| 4. | The conclusions derived from these investigations are following : first , the theoretical prediction method of evaporation duct brought forward in this dissertation is successful
对这几个方面的研究，本文得到了如下结论：一、本文首次提出的以伪折射率为核心相似参量的蒸发波导环境预测理论是成功的。 |
| 5. | 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。 |
| 6. | To evaluate accurately the ability of radar in evaporation duct environments , a method is proposed which is combined the electromagnetic waves propagation numerical equation with the theories of radar receiver
该文主要针对如何准确评估蒸发波导环境下雷达的探测能力问题，利用电磁波传播的数值方程并结合雷达接收机理论，构建了雷达探测定量评估的模型和方法。 |
| 7. | Radars always display the anomalous performance characteristics such as over the horizon ( oth ) detection capability when they are operated in marine environments because they are influenced by evaporation duct which is a kind of familiar natural phenomenon
摘要蒸发波导是海洋大气环境中一种常见的自然现象，受其影响，雷达常常出现如超视距探测等异常特征。 |
| 8. | It is concluded from the investigations that evaporation duct propagations and other tropospheric duct propagations become very complicate multi - discipline problems at present time including em theory , atmospheric science and applied science etc . , and one of the tough and hot issues in the field of tropospheric propagation
经过多年的研究，目前蒸发波导传播等电波传播问题成为非常复杂的多学科问题，涉及到电磁波理论、大气科学和应用科学等，成为对流层传播研究中的一个热点和难点问题。 |
| 9. | According to the results of the field test , the accuracy of this method in predicting the occurrence of evaporation duct arrives at 80 % , the error of the average predicted evaporation duct height is about 28 % with each error ranging from 24 . 6 % to 57 . 6 % within the measurement height range
根据外场试验的结果，其预测蒸发波导环境出现的准确率可达到80 ，对平均蒸发波导高度的预测误差约为28 ，在试验可测量的高度范围内，不同蒸发波导高度的误差在24 . 6 57 . 6之间。 |
| 10. | 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。 |
