@article{article_339346, title={The Investigation of Relationship between Solar Parameters and Total Electron Content over Mid-Latitude Ionosphere}, journal={Celal Bayar University Journal of Science}, volume={13}, pages={707–716}, year={2017}, DOI={10.18466/cbayarfbe.339346}, author={Atıcı, Ramazan and Sağır, Selçuk}, keywords={IRI-2012,IONOLAB,Mid-Latitude Ionosphere,Solar Parameters,TEC}, abstract={<p style="text-align: justify; "> <span lang="EN-US" style="font-size:10.0pt;line-height: 115%;font-family:"Times New Roman","serif";mso-fareast-font-family:"Times New Roman"; mso-ansi-language:EN-US;mso-fareast-language:TR;mso-bidi-language:AR-SA">In this study, the relationship with solar parameters (F10.7 index, proton density and proton speed) of the Total Electron Content (TEC) values obtained from IONOLAB and IRI-2012 models is statistically examined during equinox months (March and September) of 2009 over mid-latitude ionosphere for night and day time. As a statistical tool, a multiple regression model is used to determine the relationship between solar parameters and TEC values. At Universal Time (UT) 1200, the explainable rates by solar parameters of TEC changes are calculated as 58% and 55% for IONOLAB TEC values in March and September equinox months, </span> <span lang="EN-US" style="font-size:10.0pt;line-height:115%; font-family:"Times New Roman","serif";mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin;mso-ansi-language:EN-US;mso-fareast-language: EN-US;mso-bidi-language:AR-SA"> on the other hand </span> <span lang="EN-US" style="font-size:10.0pt;line-height:115%;font-family:"Times New Roman","serif"; mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN-US;mso-fareast-language: TR;mso-bidi-language:AR-SA">these rates are obtained as 99% and 57%  for IRI-2012 TEC values. At 2400UT, </span> <span lang="EN-US" style="font-size:10.0pt;line-height:115%;font-family:"Times New Roman","serif"; mso-fareast-font-family:Calibri;mso-fareast-theme-font:minor-latin;mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">57 % and 39 % </span> <span lang="EN-US" style="font-size:10.0pt;line-height:115%;font-family:"Times New Roman","serif"; mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN-US;mso-fareast-language: TR;mso-bidi-language:AR-SA">of changes in IONOLAB and </span> <span lang="EN-US" style="font-size:10.0pt;line-height:115%;font-family:"Times New Roman","serif"; mso-fareast-font-family:Calibri;mso-fareast-theme-font:minor-latin;mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">51 % and 59 % </span> <span lang="EN-US" style="font-size:10.0pt;line-height:115%;font-family:"Times New Roman","serif"; mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN-US;mso-fareast-language: TR;mso-bidi-language:AR-SA">of changes in IRI-2012 TEC values during equinox months </span> <span lang="EN-US" style="font-size:10.0pt;line-height:115%; font-family:"Times New Roman","serif";mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin;mso-ansi-language:EN-US;mso-fareast-language: EN-US;mso-bidi-language:AR-SA">could be explainable by solar parameters, respectively. </span> <span lang="EN-US" style="font-size:10.0pt;line-height:115%; font-family:"Times New Roman","serif";mso-fareast-font-family:"Times New Roman"; mso-ansi-language:EN-US;mso-fareast-language:TR;mso-bidi-language:AR-SA"> It is observed that the IONOLAB-TEC values are higher than IRI-2012 TEC values on both equinox months. Also, IONOLAB-TEC values on September 2009 are greater than ones on March 2009. When compared to the two models, we concluded that IONOLAB model is more sensitive than IRI-2012 model to the changes occurring in the sun over mid-latitude. </span> </p>}, number={3}, publisher={Manisa Celal Bayar Üniversitesi}