University of Tehran Press Journal of the Earth and Space Physics 2538-371X 27 2 2001 06 22 - - 12878 FA Journal Article 1970 01 01 The study of variations of different ionospheric layers at the day of solar eclipse and the calculation of the recombination factor of electrons «1), were our aim. In this regard, the measurements were made with an ionospheric vertical sounding instrument at the interval IS to I minutes at the control day and the day of solar eclipse. The ionospheric data extracted from the ionospheric records (ionograms) and electron density variations with height of the different layers were obtained based on the relation between electron density and frequency of the layers. Finally the recombination factor for F I layer was calculated. The behaviors of the electron density variations indicate a rapid decrease of ionization of different ionospheric layers. The study of variations of different ionospheric layers at the day of solar eclipse and the calculation of the recombination factor of electrons «1), were our aim. In this regard, the measurements were made with an ionospheric vertical sounding instrument at the interval IS to I minutes at the control day and the day of solar eclipse. The ionospheric data extracted from the ionospheric records (ionograms) and electron density variations with height of the different layers were obtained based on the relation between electron density and frequency of the layers. Finally the recombination factor for F I layer was calculated. The behaviors of the electron density variations indicate a rapid decrease of ionization of different ionospheric layers. https://jesphys.ut.ac.ir/article_12878_567d955090dff720a1633ae6b7140bd1.pdf