Study on Fine Structure of Ionosphere in China
Abstract
Many studies have revealed the ionospheric changes in geomagnetic storm to understand more deeply the ionosphere. In this study, we focus on the ionospheric longitudinal variations within small regions during the magnetic storm of August 2018. We use total electron content (TEC) data from a BeiDou geostationary orbit (GEO) receiver network in the Asia-Australia sector. The BDS GEO TEC provide continuous ionospheric monitoring at a single location, which can eliminate the mixed effect of spatial and temporal variations of the ionosphere. Pronounced longitudinal variations within a small region occurred at different times of the magnetic storm. It is observed that distinct longitudinal gradient is present in BDS GEO TEC at 23°N(95°-125°E) during quiet time. The TEC is larger in the west than in the east. But the longitudinal gradient is suppressed during initial and main phase even though this ionospheric storm effect is positive. And the location of TEC maximum is also changing. The longitudinal gradient is more various during the recovery phase. In addition, these striking longitudinal variations are only present in low latitude and no remarkable features in midlatitude.
- Publication:
-
43rd COSPAR Scientific Assembly. Held 28 January - 4 February
- Pub Date:
- January 2021
- Bibcode:
- 2021cosp...43E.648Y