基于HCOPAR雷达的中国低纬F层V型散射回波研究

V-shaped scattered echoes in F-layer observed by the HCOPAR radar in low-latitude areas of China

摘要:

基于中国子午工程在海南富克台站获取的甚高频相干散射雷达数据，对低纬度地区电离层F层的场向不均匀体特性进行了细致探究。在此过程中，识别出一种罕见的V型结构不均匀体，进一步绘制后向扇形图，结合测高仪数据分析其时频特性。将分析结果与相应时段的气辉图像进行比对，结果显示这种V型结构不均匀体是由于重力波对电离层背景电场的调制，导致其动力学状态的改变所致。

Abstract:

Meridian Project, a detailed investigation of the characteristics of field-aligned irregularities in the F region of the ionosphere in low latitude areas in China was conducted. During this process, a rare V-shaped structure of irregularities was identified. Further mapping of the fan-shaped diagram and analysis of its time-frequency characteristics in conjunction with ionosonde data were performed. The analysis results were compared with the airglow images of the corresponding period, and the results show that this V-shaped structure of irregularities is caused by the modulation of the background electric field of the ionosphere by gravity waves, leading to changes in its dynamic state.