低功耗电离层垂测仪系统及在银川地区的试验

Development of a Low-power Ionosonde in Yinchuan and Analysis of Preliminary Test Results

研制了一台低功耗电离层垂测仪,该系统采用新型Delta天线、可变接收时长和类巴克码脉冲编码设计,安装在宁夏银川地震监测试验场。2021年8月开展了全天连续观测试验,观测获得的科学数据验证了垂测仪的探测能力和探测效率。试验结果表明:F2层临界频率日变化与银川地区太阳高度角日变化趋势存在一定的正相关性;采用图像处理技术实现了原始频高图中O/X波自动分离,获得两极化波临界频率之差约为0.7 MHz,与银川当地0.5倍磁旋频率0.7 MHz基本一致。该电离层垂测仪系统运行稳定,试验数据可靠,对后续星地联合多维度探测和信号处理具有一定的算法参考和数据积累意义。

A low-power ionosonde is developed,with a pair of new kind Delta antenna and barker-liked coding technique.A varied sampling duration is utilized in the receiving windows to improve the test efficiency.The ionosonde is built in Yinchuan Earthquake Monitoring Test Site,Ningxia Hui Autonomous Region of China.The continuous observation test was carried out for a whole day in August 2021.The preliminary test result shows that the diurnal variation of the critical frequency of the F2 layer has a positive correlation as of the solar elevation angle in Yinchuan area.An image processing technique is employed for the automatic separation of the O/X waves in the original ionograms.The difference between the critical frequencies of the two polarized waves is about 0.7 MHz,which is basically consistent with the local 0.5 times magnetic spin frequency of Yinchuan,which is 0.7 MHz also.The operation of the ionosonde is stable,and the obtained data are reliable,which provides a valuable algorithm reference and data accumulation significance for the subsequent in-depth processing of satellite-ground joint multi-dimensional data.