Physics – Geophysics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3124801w&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 24, CiteID L24801
Physics
Geophysics
11
Exploration Geophysics: Remote Sensing, Ionosphere: Ionospheric Disturbances, Radio Science: Space And Satellite Communication, Radio Science: Radio Wave Propagation, Radio Science: Ionospheric Propagation (2487)
Scientific paper
The noisy and impulsive fluctuations in the CHAMP radio occultation (RO) amplitude data are similar to the C-type and S-type ionospheric amplitude scintillations formerly observed at 1.5 GHz in the mid-latitude region in satellite-to-Earth Inmarsat links. These amplitude scintillations can be associated with different types of ionospheric structures. S-type amplitude variations can be explained by the influence of inclined plasma layers in the ionosphere where the RO signal trajectory is perpendicular to the sharp plasma gradient. Simulation indicates the possibility to reveal the spatial distribution of the electron density in the inclined ionospheric layers from analysis of the S-type RO amplitude variations. The seasonal, geographical and temporal distributions of CHAMP RO events with high S4 index values observed during the years 2001-2003 indicate their dependence on solar activity.
Igarashi Kaori
Liou Yuei-An
Matyugov S. S.
Pavelyev A. A.
Pavelyev Aleksandr G.
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