On the Variability Within-the-Hour and from Hour-to-Hour of the F-Region Characteristics Above Rome

摘要

The statistical analysis of daily 5-minutes f_oF2, M(3000)F2 and MUF values, measured at Rome, leads to interesting results regarding the variability within-the-hour and from hour-to-hour of these parameters. There is evidence that the relative deviations of the 5-minutes values of these characteristics from their corresponding nearest hourly daily value are less than ±0.10 during the post-dawn morning hours up to sunset whereas around dawn and sunset hours they are larger. An "intrinsic" fluctuation of more than 3% is always present.