Simultaneous electric field measurements made in the auroral ionosphere by using three independent techniques

摘要

The present paper deals with the initial results of these three electric field experiments. In the first flight, which took place under slightly disturbed conditions (+40 7), all methods indicated a roughly northerly field of about 22 mv/m. In the second flight (under quiet conditions), a southerly field between 3 and 6 mv/m was observed by the different experiments. The direction of the plasma drift derived from the measured orientaion of the wake of the rocket agrees within 10° with that derived from the double-probe results and the barium cloud observations. Estimates of electron density and temperature were obtained from the operation of the double-probe system in different modes. These electron density values were in good agreement with those derived from the ionosonde data. and from the Langmuir-probe data.