Ionospheric E¿B convections are measured by a new technique that uses satellite scintillations. The measurements are for and ionospheric region centred on 39¿N, 82¿W geographic or 53¿ invarient latitude. Results are presented for spring equinox 1980. The quiet condition eastward convection drift is approximately ViE = -12+43 cos(2&pgr;/24)(t-13.4). During disturbed conditions at nighttime the westward convection becomes large and highly variable. The northward perpendicular E¿B convection is approximately ViN = -5+13 cos (2&pgr;/12)(t-10.5)+6 cos (2&pgr;/24) (t-11.5) m/s during quiet conditions. During disturbed conditions the semidiurnal component of the northward convection increases by about a factor of 3 and becomes larger than the diurnal. |