Summary
A high-latitude tide basis function that describes the major migratingand non-migrating components of the semidiurnal and diurnal tide can be fitted to wind data using linear least-squares fitting techniques. MF radars at Davis (695, 78E), Syowa (695, 40E), Rothera (685, 68W) and Scott Base (785, l67E) in Antarctica that are operating concurrently allow real-time application of this tidal analysis technique. After consideration of the potential for spatial aliasing, time series of tidal amplitudes and times of maximum are calculated. A la-day fitting window provides insight into tidal variations at sub-monthly time scales. Using Davis meteor radar echo heights and width distributions to define equivalent heights, the westward zonal wavenumber one results are compared to those obtained concurrently by the COBRA meteor radar at South Pole and are found to agree. The seasonal and short-term variation of the tides are then considered, as are possible source mechanisms. It is found that nonmigrating components of both the diurnal and the semidiurnal tide are present in high southern latitude MLT winds.