Investigation of FUV Irradiances Form Sdrs Data Based on Dmsp/ssusi during Various Strong Geomagnetic Storm Events
Abstract
The intensities of far ultraviolet (FUV) wavelengths during geomagnetic storm events are studied in this work based on the Sensor Data Records (SDRs) data. The SDRs data were observed by the Special Sensor Ultraviolet Spectrographic Imager (SSUSI) on board the Defense Meteorological Satellite Program (DMSP) F16, F17, and F18. The various strong geomagnetic storm events were chosen by using criteria of SYM/H, AE, and Kp indices. The SDRs data were used to analyze the irradiances from five different FUV wavelengths, which are Hα 1216 Å, OI 1304 Å, OI 1356 Å, N2 LBHS, and N2 LBHL. The variations of the intensities in each event were used to analyze in order to search for the correlations, for example, with the precipitation rate of energetic neutral atoms (ENAs) from ring current. The results show that the variations of intensities for each wavelength are distinctive among events. Some events have high intensity around magnetic equator, which were simultaneous with or delayed from the minimum of SYM/H index time. For most events, the intensities from the wavelength OI 1356 appeared high at regions above and below magnetic equator region. Moreover, the wavelength of both N2 wavelengths in some events were found to have unstable intensities around south magnetic latitudes at the same time in every day. These results could suggest the connection to magnetospheric behaviors, especially, in ring current and radiation belt regions.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMSM11B3284J
- Keywords:
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- 0310 Airglow and aurora;
- ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 2704 Auroral phenomena;
- MAGNETOSPHERIC PHYSICS;
- 2716 Energetic particles: precipitating;
- MAGNETOSPHERIC PHYSICS;
- 2772 Plasma waves and instabilities;
- MAGNETOSPHERIC PHYSICS