The Aim of Thesis
This work aims to make assess for the nature of the correlation between three different solar-ionospheric indices, these are: Smoothed Sunspot Number (SSN), Solar Flux (F10.7 cm) index and Ionospheric T-Index (T-index) to get the mathematical mutual correlated equations between these indices for the seasonal and annual times for the periods (Aug. 1996 – Nov. 2008) (Dec. 2008 – Nov. 2019) of the 23rd and 24th solar cycles. Also, the work aims to conduct a statistical study for the variation between the adopted indices (SSN, F10.7 & T-index) during the tested years to assess the correlation type between the three solar-ionospheric indices.