THE CORRELATION OF AKR WAVES WITH PRECIPITATING ELECTRONS AS DETERMINED BY PLASMA-WAVE AND X-RAY IMAGE DATA FROM THE POLAR SPACECRAFT

Simultaneous measurements are presented of the intensities of AKR wave s in the 60 kHz to 800 kHz range and the local time distributions of t he fluxes of electrons precipitating into the atmosphere using wave an d bremsstrahlung x-ray data acquired on the POLAR spacecraft. The imag es of 2 to 12 keV x-ray emission measured with the PIXIE spectrometer were used to obtain the positions and intensities of the electron prec ipitation regions. Electric field wave measurements of the AKR were ob tained with the Plasma Wave Instrument (PWI). Data are presented from a satellite pass on 19 April 1996 in which there were several short te rm enhancements in the intensities of both waves and x-rays. Tile AKR electric field strengths were correlated with x-rays emitted over a si x hour local time range in the pre-midnight sector with a correlation coefficient of 0.51. At the times of some of the rapid increases in th e x-ray fluxes the AKR intensities exhibited similar sharp onsets.