基于HF返回散射和斜向探测的PD变换新方法  

A New PD Transformation Method Based on HF Backscatter and Oblique Sounding

作　　者：王世凯[1] 柳文[1] 郭延波[1] 凡俊梅[1] 焦培南[1] 

机构地区：[1]中国电波传播研究所青岛研发中心电波环境特性及模化技术国防重点实验室,山东青岛266107

出　　处：《中国电子科学研究院学报》2010年第1期90-96,共7页Journal of China Academy of Electronics and Information Technology

基　　金：国家自然科学基金项目(60771049);预先研究项目(513070204)

摘　　要：提出了基于实测返回散射电离图和斜向探测电离图及三维射线追踪技术综合处理的群路径P到地面距离D变换(简称PD变换)的坐标配准系数(kτ)修正方法,采用"归一化"的思想,计算射线追踪技术合成的斜测电离图和实测斜测电离图的归一化频率对应的群路径差值,利用该差值,修正不同距离的合成的群路径,特别是能够对远区没有信标参考地区的坐标配准系数进行修正。仿真分析了临界频率和反射高度估计存在误差时"归一化"方法修正的有效性,从而验证了该方法能够有效地克服电离层参数估计不准对坐标配准系数的影响。A method for correcting the coordinate registration coefficients of PD transformation based on backscatter ionograms, oblique ionograms and three-dimensional ray tracing techniques is developed. Using the idea of normalization, the corresponding group path difference of the normalized frequencies given by the synthesized and the real oblique ionograms is obtained. With the difference value, the synthesized group paths from different distance bins are corrected. In particular, the coordinate registration coefficients in the far zone where there are no reference sources such as beacons can be modified. The validation of the method is demonstrated when the estimations of the ionospheric critical frequency and the reflecting height are incorrect, which proves that the method can overcome the influence of the incorrect estimations of the ionospheric characteristic parameters on the coordinate registration coefficients.

关 键 词：坐标配准 返回散射探测 斜向探测 归一化 电离层 临界频率 射线追踪 

分 类 号：TN911[电子电信—通信与信息系统]