Nocturnal variation of total absorption and nighttime E-region

Details Nocturnal variation of total absorption and nighttime E-region Nocturnal variation of total absorption and nighttime E-region

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ijrsp...5..263j&link_type=abstract

(Symposium on Ionosphere and Magnetosphere, Waltair, India, Jan. 7-9, 1976.) Indian Journal of Radio and Space Physics, vol. 5,

Physics

Space Physics

E Region, Ionospheric Propagation, Night Sky, Nocturnal Variations, Radio Attenuation, Atmospheric Ionization, D Region, Electromagnetic Absorption, Ionospheric Electron Density, Lyman Alpha Radiation, Lyman Beta Radiation

Scientific paper

The results of a study on ionospheric absorption during night hours at Udaipur (23 degrees 35 min N) are presented. In the nocturnal variation of the total absorption, a dip is observed during twilight hours. The higher value of absorption observed during the night hours as compared to that during twilight hours is attributed to ionization in the E-region caused by geocoronal Lyman-beta and Lyman-alpha. The electron density at the peak of the nighttime E-region is estimated to be of the order of 10 to the 4th electron/cu cm.

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