Ionospheric conductivities according to Doppler radar observations of stimulated turbulence

Results of Doppler radar observations are discussed of HF scattering from h eater induced inhomogeneities in an underdense ionospheric plasma. The quas iperiodic variations shown by the Doppler frequency shift are associated wi th the E x H plasma drift in the electric field of geomagnetic pulsations. Combined with a theoretical model of hydromagnetic wave propagation, with a llowance for an arbitrary dip angle of the geomagnetic field and arbitrary angle of incidence, the Doppler shift measurements at several points along the geofield tube permit estimating height-integrated ionospheric conductiv ities (C) 1999 Elsevier Science Ltd. All rights reserved.