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- Title
The Ionospheric Three-Dimensional Electron Density Variations Induced by the 21 August 2017 Total Solar Eclipse by Using Global Ionospheric Specification.
- Authors
Lin, Chi-Yen; Liu, Jann-Yenq; Lin, Charles Chien-Hung; Chou, Min-Yang
- Abstract
Global Ionospheric Specification (GIS) is based on the Gauss–Markov Kalman filter to assimilate the slant total electron content (TEC) observed from ground-based GPS receivers and space-based radio occultation instrumentations in order to reconstruct three-dimensional (3D) ionospheric electron density structure, and it can remotely sense and monitor the weather condition in space. In this study, five minutes of high temporal resolution GIS is implemented in order to reconstruct the 3D electron density structure on the 21 August 2017 total solar eclipse and analyze the variations induced by the moon's shadow. To obtain more information of the ionosphere, from the extend 2200 GPS stations on the continental United States, are added for assimilation. The results show the ionosphere peak height (hmF2) uplift was 30–50 km altitude in latitude 25–40°N, and that the electron density depletion at higher altitudes (400 km) has a more noticeable time delay than at low altitudes (200 km), especially in low-latitude regions.
- Subjects
IONOSPHERIC electron density; TOTAL solar eclipses; ELECTRON density; LATITUDE; GEOGRAPHIC information systems; SPACE environment
- Publication
Remote Sensing, 2023, Vol 15, Issue 15, p3887
- ISSN
2072-4292
- Publication type
Article
- DOI
10.3390/rs15153887