The amplitude scintillations and QTEC were measured using three GPS ionospheric scintillation and QTEC monitors at Wuhan.By using wavelet analysis and cross-correlation technique

the zonal apparent drift velocity of the ionospheric irregularities was estimated based on the observations of the three spaced GPS receivers during the great storm occurring in Nov.2004.Results show that there were the different scale ionospheric irregularities which caused strong amplitude scintillations and QTEC rapid fluctuations in the night of Nov.10.From measurements of the rate of QTEC（RT） at three spaced receivers

it is found that the irregularities drifted westward along the zonal direction

and the drift velocities exhibited degressive trend

changing from about 130 m/s at 21:30 BST to about 40 m/s at 02:30 BST.This research will provide a feasible method for measurement of the ionospheric zonal velocity.