Ground and space-based geomagnetic data were used in the investigation of the longitudinal, seasonal and lunar phase dependence of the equatorial counter electrojet (CEJ) occurrence in the Peruvian, Brazilian, African, Indian and Philippine sectors during geomagnetically quiet days from the solar cycle 24 (2008 to 2018). We found that CEJ events occur more frequently during the morning (MCEJ) than in the afternoon (ACEJ). The highest MCEJ and ACEJ occurrence rates were observed for the Brazilian sector. Distinct seasonal dependence was found for each longitudinal sector under investigation. The lunar phase dependence was determined for the first time for the Philippine sector (longitude 125°E), and it was shown to be less pronounced than in the Peruvian, Brazilian and African sectors. We demonstrate that differences in CEJ rates derived from ground-based and satellite data can arise from the longitudinal separation between low-latitude and equatorial stations that are used to determine the signal and its consequent time delay in their sunrise/sunset times at ionospheric heights.

中文翻译：

---

赤道反电动射流在太阳周期中的纵向变化24

地磁和空基地磁数据用于调查太阳周期中地磁安静期间在秘鲁，巴西，非洲，印度和菲律宾地区发生的赤道逆电喷（CEJ）的纵向，季节和月相依赖性。 24（2008年至2018年）。我们发现，CEJ事件在上午（MCEJ）的发生比在下午（ACEJ）的发生更为频繁。在巴西，观察到最高的MCEJ和ACEJ发生率。在调查的每个纵向部门中发现了明显的季节性依赖性。菲律宾首次确定了月相依赖关系（经度为125°E），并且事实证明这种依赖性不如秘鲁，巴西和非洲地区明显。