Physics
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jatp...47..945z&link_type=abstract
(IUGG, IAGA, USAF, et al., International Symposium on Equatorial Aeronomy, 7th, Hong Kong, Mar. 22-29, 1984) Journal of Atmosphe
Physics
E Region, Electromagnetic Scattering, Equatorial Atmosphere, Ionospheric Propagation, Solar Eclipses, Doppler Effect, High Frequencies, Ionospheric Disturbances
Scientific paper
Results and analyses of solar eclipse effects on the lower ionosphere are presented. After the first contact of the total eclipse on February 16, 1980, an absorption increment of 12 dB was observed. At the same time, the frequency of amplitude fading increased and Doppler frequency shift disturbances appeared. The calculation of signal strength is carried out by means of Booker's (1978, 1980) scattering theory, supposing an outer scale equal to 1000 m and an inner scale equal to 5 m, of space scale spectrum of field-aligned irregularities in the equatorial E-region. The calculated results agree fairly well with observations. Results showed that, because of the formation of lower ionospheric field-aligned irregularities in the course of the obscuration of solar local ionization source, radio wave scattering was strengthened.
Xiong N. L.
Zhang Jia-Xiang
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