高频地波雷达垂直向电离层电子浓度估计方法  

The vertical ionosphere electron density probing with high frequency surface wave radar

作　　者：杨旭光[1,2] 于长军 刘爱军 权太范[1] 

机构地区：[1]哈尔滨工业大学电子与信息工程学院,哈尔滨150001 [2]哈尔滨工程大学理学院,哈尔滨150001 [3]哈尔滨工业大学(威海)信息与电气工程学院,威海264209

出　　处：《电波科学学报》2016年第2期291-296,381,共7页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61571159;61171188)

摘　　要：高频地波雷达工作时,往往同时接收到大量的电离层反射回波,这些电离层杂波会对目标检测造成严重影响,因此,电离层杂波抑制是当前高频地波雷达领域的研究热点.文章将电离层回波视为可用信源,从中反演出垂直方向电离层对应的电子浓度与等离子体频率.对R-D(Range-Doppler)谱图进行预处理,获取垂直方向的电离层回波谱,建立其回波功率与电离层雷达散射截面积之间的数学模型,进而得到对应的电子浓度.在高频地波雷达站进行了实验,并将反演结果与IRI-2012进行对比,验证了该方法的可行性和有效性.High frequency surface wave radar（HFSWR） usually receives a mass of ionospheric echoes which degrade the capability of detecting target seriously, making the ionospheric clutter suppression a hot spot in the research of HFSWR. In this paper, however, the ionospheric echoes is taken as signal sources rather than clutters, thus providing a method to extract electron density and plasma frequency regarding the vertical ionosphere. First, the pretreatment is taken in the Range-Doppler（R-D） Spectrum to extract the vertical ionospheric echoes. Then, the corresponding electron density is obtained from the mathematic relationship between echoes power and ionosphere RCS. At last, experiments is proceeded in the HFSWR station, and the effectiveness and feasibility of ionosphere remote sensing is verified in comparison with the inversion results with that of IRI-2012.

关 键 词：高频地波雷达 电离层垂直探测 电子浓度 相关特性 

分 类 号：TN011.2[电子电信—物理电子学]