Ionospheric drifts at Ibadan: Results from correlation and dispersion analyses.

Abstract

E and F region drift records observed (by the Mitra method) at Ibadan between November, 1974 and March, 1975 have been subjected to both the full correlation and dispersion methods of analyses. The paper examines the relative occurrence frequency of dispersive motions in E and F region records at an equatorial station and the validity of the suggestion by JONES and MAUDE (1972) that inadequate spacing of receiving aerials could be responsible for the low value of the true velocity V of the correlation analysis relative to the mid-frequency range of the Fourier velocities obtained by dispersion analysis. This of course requires the determination of aerial spacing that could be considered adequate for E and F region drift measurements at Ibadan. Finally, as an aid to the interpretation of dispersion analyses results, the degree of the consistency with which both the correlation and dispersion methods of analyses could detect steady winds or bulk motion in E region records has been investigated.