Modern ionosondes provide more than a classical ionogram sounding. Their construction together with a geometry of the antenna field allow additional monitoring of the other property of the ionospheric plasma. On the regular basis the ionogram measurements are accompanied by routine plasma drift measurements. Join measurements of the ionogram and plasma drift is important for the correct drift setting. Knowledge of the drift behavior gives us a chance to understand dynamic processes in the ionosphere. The ionosonde drift is derived from the measured Doppler frequency shift and angle of arrival of reflected HF echoes. It is possible to detect drifts in both F and E ionospheric region with properly selected sounding frequency window. The quality of the automatic scaling of the echo traces in ionograms gives a good chance for optimal sounding frequency selection individually for each F-region drift measurement. Estimation of the drift velocity depends on the number of reflection points and their distribution. Because the oblique echoes occur due to ionospheric irregularities disturbing the electron density contours, the disturbed ionosphere is requirement for successful drift measurement. Selection of correct reflection points from raw drift data is also important for reliable drift velocity estimation.