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Title: Nocturnal Variation of Total Absorption & Nighttime E-Region
Authors: Jain, S L
Rai, R K
Issue Date: Sep-1976
Publisher: NISCAIR-CSIR, India
Abstract: The results of a study on ionospheric absorption during night hours at Udaipur (23o 35'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-β and Lyman-ɑ. The electron density at the peak of the nighttime E-region is estimated to be of the order of 104 electron/cm3.
Page(s): 263-264
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections:IJRSP Vol.05(3) [September 1976]

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