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电离层的状态及其变化在短波通信、天波超视距雷达和短波广播等依赖天波技术的系统应用中有重要意义.以前很少看到关于短波信道与其链路穿过电离层的状态及其变化的同步观测及其相关性定量描述.本文利用2011年7月21-27日厦门—武汉链路短波信道观测数据和2011年12月10-16日西安武汉—莆田链路短波信道观测数据,以及厦门、武汉、西安电离层垂直观测数据,对西安—武汉—莆田链路短波信道、厦门—武汉链路短波信道及其链路穿过的电离层特征参量相关性进行了分析研究,结果如下:(1)西安—莆田链路短波信道的最大可用频率(MUF)与该链路的中点(武汉)电离层F层临界频率(foF2)的相关系数最大,为0.974;(2)西安—莆田链路MUF与链路端点(西安)电离层foF2的相关系数稍小些,西安武汉链路MUF与链路两端(武汉、西安)电离层foF2的相关系数也稍小些,但都接近于0.930;(3)西安—莆田链路MUF与厦门(距离莆田约为140 km)电离层foF2也比较小,为0.912;(4)西安一武汉链路MUF与厦门(距离武汉约770 km)电离层foF2的相关系数更小一些,为0.877;(5)根据厦门电离层垂测仪的观测,去除掉与电离层Es相关的数据后,厦门一武汉短波信道MUF与厦门电离层foF2的相关系数为0.557;不去除时,其相关系数几乎为零.这些结果对于提高短波信道预测能力和短波信道信息在依赖天波技术系统中应用水平有重要帮助.
The state of the ionosphere and its changes are of great importance in system applications that rely on sky-wave technology, such as shortwave communications, sky-wave over-the-horizon radars, and shortwave broadcasting. Previously seldom seen the state of the shortwave channel and its link through the ionosphere and its The change of synchronization observation and the quantitative description of its correlation.In this paper, using the observed data of Xiamen-Wuhan link shortwave channel from July 21-27, 2011 and the shortwave channel observations of Xi’an-Wuhan-Putian link from December 10-16, 2011, And the vertical observation data of ionosphere in Xiamen, Wuhan and Xi’an, the correlation between the ionospheric eigenparameters of Xi’an - Wuhan - Putian Link shortwave channel, Xiamen - Wuhan link shortwave channel and its link is analyzed and studied. The results are as follows : (1) The maximum correlation coefficient between the maximum available frequency (MUF) of the short-wave channel of Xi’an-Putian Link and the F-layer critical frequency of the ionospheric F layer at the mid-point of this link is 0.974; (2) The correlation coefficient between MUF of Putian Link and the ionospheric foF2 of Link End Point (Xi’an) is a little smaller. The correlation coefficient between MUF of Xi’an Wuhan Link and foF2 at the two ends of link (Wuhan and Xi’an) is slightly smaller, but both are close At 0.930; (3) ) Xi’an - Putian Link MUF and Xiamen (about 140 km away from Putian) The ionospheric foF2 is also relatively small, 0.912; (4) Xi’an-Wuhan link MUF and Xiamen (about 770 km away from Wuhan) ionospheric foF2 (5) According to the observations of Xiamen ionospheric vertical well, the correlation coefficient between Xiamen-Wuhan shortwave channel MUF and Xiamen ionospheric foF2 is 0.557 after removing the data related to ionospheric Es; When removed, the correlation coefficient is almost zero. These results are important to improve the prediction ability of shortwave channel and the shortwave channel information in the application dependent on the skywave technology system.