Abstract: he utility of Digisonde Drift Analysis(DDA)is demonstrated recently in the polar region ionospheric convection measurements. However, the assumption of uniform velocity in the field of view of sounder made in DDAis not always correct. Therefore a Generalized Digisonde Drift Analysis(GDDA)is introduced that is not limited to the condition of uniform velocity and thus makes it possible that the Digisonde drift measurement can be used in the complicated ionospheric motion analysis such as velocity shears, divergence and convergence. The main concept of GDDAand some promising simulation results are presented in the paper.