Physics
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008ge%26ae..48..232g&link_type=abstract
Geomagnetism and Aeronomy, Volume 48, Issue 2, pp.232-239
Physics
94.20.V.V, 94.20.Jj
Scientific paper
The observations of the state of the midlatitude ionospheric D region during the March 29, 2006, solar eclipse, based on the measurements of the characteristics of partially reflected HF signals and radio noise at a frequency of f = 2.31 MHz, are considered. It has been established that the characteristic processes continued for 2-4 h and were caused mainly by atmospheric gas cooling, decrease in the ionization rate, and the following decrease in the electron density. An increase in the electron density on average by 200-250% approximately 70-80 min after the eclipse beginning at altitudes of 90-93 km and approximately 240 min after the end of the solar eclipse at altitudes of 81-84 km, which lasted about 3-4 h, has been detected experimentally. This behavior of N is apparently caused by electron precipitation from the magnetosphere into the atmosphere during and after the solar eclipse. Based on this hypothesis, the fluxes of precipitating electrons (about 107-108 m-2s-1) have been estimated using the experimental data.
Gokov A. M.
Gritchin A. I.
Tyrnov Oleg F.
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