中国近海蒸发波导区划研究

Research on the Distribution of Evaporation Duct in China's Offshore Areas

蒸发波导是发生在海洋近地层中的一种异常折射现象,它能够改变电磁波的正常传播特性,对雷达、通信等电子设备性能产生重要的影响。利用被动式大气波导探测系统监测数据和国家海洋信息中心同化的0.25°×0.25°格点数据,对中国近海的蒸发波导进行了统计分析,结合蒸发波导对雷达的影响,对中国近海的蒸发波导进行了区域区划,形成了中国近海蒸发波导四级分布,以及雷达可利用波导范围的区划,为指导部队训练过程中利用蒸发波导环境提供了数据支持。

The evaporation duct is a kind of abnormal refraction phenomenon in the surface layer of oceans. It can change the normal propagation characteristics of electromagnetic waves, and significantly affect the performance of radars and communication electronic equipment. In this paper, the evaporation duct has been carried on the statistical analysis on China＇s offshore areas, by using the monitoring data of evaporation duct based on the passive duct detection system and the 0.25° ×0.25° assimilating lattice data derived from the National Marine Data Information Centre. Combined with the influence of radar caused by evaporation duct,this paper completes the division map of the evaporation duct in China＇s offshore areas, and establishes the fourlevel distribution of the evaporation duct. In addition, the available waveguide regions of radar are built. The results of this paper can provide the data support for naval ships to utilize the evaporation duct environment.