2002/02/28 by L. A. Leonovich, É. L. Afraimovich, E. L. Afraimovich +2 · 53 citations
Biochemistry, Genetics and Molecular Biology · Physics and Astronomy · #Astronomy #Atmosphere (unit) #Coronal mass ejection #Earth's magnetic field #Environmental science #Flare #Geology #Geomagnetism and Paleomagnetism Studies #Global Positioning System #Ionosphere #Ionosphere and magnetosphere dynamics #Magnetic field #Meteorology #Physics #Plasma #Remote sensing #Solar and Space Plasma Dynamics #Solar flare #Solar wind #Space weather #TEC #Total electron content #physics.geo-ph
paper · pdf · doi:10.5194/angeo-20-1935-2002
published in Annales Geophysicae 20(12), 1935-1941 (Copernicus Publications) · LaTeX, 6 pages, 4 figures, 1 table
arxiv created 2002/02/28 · openalex publication_date 2002/12/31 · arxiv updated 2015/06/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract. This paper proposes a new method for estimating the contribution from different ionospheric regions to the response of total electron content variations to the solar flare, based on data from the international network of two-frequency multichannel receivers of the navigation GPS system. The method uses the effect of partial "shadowing" of the atmosphere by the terrestrial globe. The study of the solar flare influence on the atmosphere uses GPS stations located near the boundary of the shadow on the ground in the nightside hemisphere. The beams between the satellite-borne transmitter and the receiver on the ground for these stations pass partially through the atmosphere lying in the region of total shadow, and partially through the illuminated atmosphere. The analysis of the ionospheric effect of a powerful solar flare of class X5.7/3B that was recorded on 14 July 2000 (10:24 UT, N22 W07) in quiet geomagnetic conditions (Dst = -10 nT) has shown that about 75% of the TEC increase corresponds to the ionospheric region lying below 300 km and about 25% to regions lying above 300 km.Key words. Ionosphere (solar radiation and cosmic ray effects; instruments and techniques) – Solar physics, astrophysics and astronomy (ultraviolet emissions)