摘要
中山站高频相干散射雷达于2010年4月建成投入观测,并加盟SuperDARN雷达观测网,成为中国探测电离层对流的重要手段。首先简要介绍中山站高频雷达的工作原理及工作模式,然后利用该雷达第一年的观测数据,给出了每个波束观测的电离层回波总数随距离和回波强度、多普勒速度及谱宽的分布以及电离层回波发生率随频率的变化特性。观测结果和射线追踪的模拟计算表明,由于波束指向不同,电波矢量方向与地磁场形成正交条件的区域有所不同,因此会造成不同频率下,不同波束观测的电离层回波发生率的差别。
The HF coherent scatter radar is one of the most powerful tools used to investigate ionospheric convection. The Zhongshan HF radar has been operational since April 2010, and is one of the SuperDARN network radars. The op- erational principles and procedures of the Zhongshan HF radar in Antarctica are introduced in this paper. Using da- ta from the first year＇ s observations the distribution of ionospheric echoes at each of 16 beams, the variation of ion- ospheric echoes with frequency are analyzed. The occurrence of ionospheric echoes at different frequencies is then presented. The results from observations and simulation by ray tracing show that the statistical difference of the oc- currence of ionospheric echoes between beams for different frequencies arises from the direction of beam pointing, and the area over which the beam can achieve orthogonality between the wave vector and the earth＇ s magnetic field.
出处
《极地研究》
CAS
CSCD
北大核心
2012年第4期397-407,共11页
Chinese Journal of Polar Research
基金
国家自然科学基金(41031064)
国家"863"计划项目(2008AA121703)
海洋公益性行业科研专项(201005017)共同资助
