• Anita Agrawal
• Arvind Bhargava
• Dr.Kalpana maski
• Dr.S.K Vijay
• Dr.S.D Mishra

This paper presents the empirical modelling of foF2 at low latitude station Jicamarca (12oS, 76.90oW) during high solar activity period of 23rd and 24th solar cycle. To develop the model hourly value of foF2 are collected from the site NGDC Space Physics Interactive data Resource (SPIDR) website (http://spidr.ngdc.noaa.gov). Diurnal variation is expressed by Fourier expansion of Cosine and sine function with period of 24 hours. To describe the solar activity effect, we established relationship between foF2 and sunspot number R by linear fitting method. The Second Degree Regression is applied to make improvement & the quadratic relationship between sunspot number R & foF2. We found that model and observed value of foF2 matched during sun set hours, but at the time of sunrise, there is some deviation between model and observed value of foF2. So model requires an improvement. Solar activity relation between foF2 and sunspot number, nonlinear dependent is observed.

Empirical, Fourier, Diurnal, Solar activity, Sun spot number.

"EMPIRICAL MODELING OF foF2", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.1-7, May-2019, Available :http://www.jetir.org/papers/JETIR1905R01.pdf

"EMPIRICAL MODELING OF foF2", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp1-7, May-2019, Available at : http://www.jetir.org/papers/JETIR1905R01.pdf