Equatorial Ionization Anomaly Discontinuity Observed by GOLD, COSMIC‐2, and Ground‐Based GPS Receivers' Network

作者：Xuguang Cai, Wenbin Wang, R. Eastes, Liying Qian, N. M. Pedatella, Ercha Aa, Shun‐Rong Zhang, A. J. Coster, R. E. Daniell, W. E. McClintock · 发表于：Geophysical Research Letters · 年份：2023 · DOI：10.1029/2023gl102994 · 被引用次数：28 · 研究领域：Ionosphere and magnetosphere dynamics、GNSS positioning and interference、Geophysics and Gravity Measurements

Abstract We report a new ionosphere phenomenon: Equatorial ionization anomaly (EIA) discontinuity (EIAD), based on OI 135.6 nm radiance observations from the Global Observations of Limb and Disk (GOLD), ground‐based total electron content maps and in‐situ ion density data from Constellation Observing System for Meteorology, Ionosphere, and Climate‐2. The EIAD occurs when the OI radiance of the EIA crest has a local minimum, at a fixed UT, with the radiance in the local longitude region being weaker than that on the east and west sides. In the GOLD field‐of‐view, EIAD follows the seasonal variations of EIA. EIAD appears more often over the Atlantic Ocean and Africa than over South America. It occurs more in the southern crest during the December solstice, and more in the northern crest during both equinoxes. EIAD can occur under both quiet and disturbed times.