Abstract

The manifestation of the most powerful flares of class X9.3 and X8.2 recorded on September 6 and 10, 2017, respectively, in the total electronic content (TEC) of the ionosphere, are analyzed. GPS observations at midlatitude stations located in the conditions of an illuminated ionosphere were used as the initial data. The ionospheric response was determined from phase measurements of the TEC value along satellite flights over the observation station. A high linear correlation was found between the amplitude of the increase in TEC (ΔТЕС) during flares and the zenith angle of the Sun for longitudinally spaced stations. For the class-X9.3 flare, ΔТЕС exceeded 3 TECU, while for the X8.2 flare, the amplitude was almost two times smaller. It is shown that this is mainly due to the different positions of flares on the solar disk. The spatiotemporal response of the ionosphere to flares was analyzed with TEC maps with a time resolution of 5 min. Errors in navigation measurements that are caused by the effects of solar flares are identified and evaluated.

中文翻译：

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2017年9月太阳耀斑的电离层效应及其对导航测量误差的影响评估

摘要

分析了分别在2017年9月6日和10日记录的电离层总电子含量（TEC）中X9.3级和X8.2级最强耀斑的表现。使用位于电离层照亮条件下的中纬度站的GPS观测作为初始数据。电离层响应是通过沿观测站上的卫星飞行的TEC值的相位测量确定的。发现在耀斑期间TEC的增加幅度（ΔТЕС）与纵向间隔站点的太阳天顶角之间存在高度线性相关。对于X9.3级耀斑，ΔТЕС超过3个TECU，而对于X8.2级耀斑，其振幅几乎减小了两倍。结果表明，这主要是由于耀斑在太阳圆盘上的位置不同所致。电离层对耀斑的时空响应用TEC图进行分析，时间分辨率为5分钟。识别并评估由太阳耀斑的影响引起的导航测量误差。