Survey of Localized Solar Flare Signatures in the Ionosphere with GNSS, VLF, and GOES Observations

Blevins, Sandra ; Hayes, Laura ; Collado-Vega, Y ; Michael, Benjamin P ; Noll, Carey E

关键词: EARTH IONOSPHERE;    ELECTRON DENSITY (CONCENTRATION);    EXTREME ULTRAVIOLET RADIATION;    IONIZATION;    NAVIGATION SATELLITES;    SATELLITE OBSERVATION;    SOLAR FLARES;    D REGION;    F REGION;    GLOBAL POSITIONING SYSTEM;    GOES SATELLITES;    SPACE WEATHER;    VERY LOW FREQUENCIES;   

RP-ID  :  IN43C-0092,GSFC-E-DAA-TN54904

学科分类：地球科学(综合)

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Global navigation satellite system (GNSS) phase measurements of the total electron content (TEC) and ionospheric delay are sensitive to sudden increases in electron density in the layers of the Earth’s ionosphere. These sudden ionospheric disruptions, or SIDs, are due to enhanced X-ray and extreme ultraviolet radiation from a solar flare that drastically increases the electron density in localized regions. SIDs are solar flare signatures in the Earth’s ionosphere and can be observed with very low frequency (VLF ~ 3-30 kHz) monitors and dual-frequency GNSS (L1 = 1575.42 MHz, L2 = 1227.60 MHz) receivers that probe lower (D-region) to upper (F-region) ionospheric layers, respectively.