Abstract Hourly monthly median values of the F2-layer critical frequency, foF2, measured at some European stations over one solar cycle at least, are fitted to the linear regression model foF2=aR+b. The coefficients a and b are determined for constant cosχ values for each month in each station. The results show that the most responsible for the winter-summer anomaly is the coefficient a, although b has before mid-day a smaller value in summer than in winter. On the contrary, from about mid-day up to sunrise b is greater in summer than in winter, so that it shows a diurnal anomaly. These anomalies seem to be related to corresponding variations of the composition of the neutral atmosphere at ionospheric heights.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Behaviour of foF2 over European mid-latitudes


    Contributors:
    Kouris, S.S. (author) / Dominici, P. (author) / Zolesi, B. (author)

    Published in:

    Publication date :

    1993-01-01


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Appendix to behaviour of foF2 over European mid-latitudes

    Kouris, S.S. / Dominici, P. / Zolesi, B. | Elsevier | 1993



    Variability of foF2 at Low and Middle Latitudes

    Gulyaeva, T. L. / Aggarwal, S. / Mahajan, K. K. et al. | British Library Conference Proceedings | 1998