EFFECTS OF PRODUCTION AND LOSS OF ELECTRONS ON HF DOPPLER RADAR MEASUREMENTS OF VERTICAL PLASMA DRIFTS

The measurements of vertical plasma drifts at magnetic equator using H F Doppler radar include contributions due to production and loss of el ectrons and also due to the equatorial electric field. From the comput ation of the electron density profiles, the temporal variation of elec tron density changes has been studied and the contribution of producti on and loss of electrons to the vertical plasma drift measurements usi ng HF Dopper radar during daytime has been evaluated. The evaluation o f vertical drifts has been made for different conditions of the ionosp here and for different zenith angles.