Abstract

Besides operating incoherent scatter radars, EISCAT offers a powerful HF transmitter (heating facility) in the 4-8 MHz range and a digital sounder (dynasonde). One of the areas of recent research interest is how do the various non-linear phenomena produced in the ionosphere by powerful HF-wave injection vary with look-direction, in particular with respect to the geomagnetic field. To address one aspect of this, we recently had a large international campaign where an HF interferometer was used to find the direction of arrival of stimulated electromagnetic emissions (SEE). Some initial results will be shown.

Various upgrades to the HF facility are being made. We are intending to use one of the transmitting antenna arrays as a 21 dBi gain receiving array to look for magnetospheric or other echoes at 8 MHz from along the geomagnetic field-aligned direction. Ideas for experiments and possible collaborations will be discussed.

The presentation (PDF)