EISCAT VERIFICATION IN THE DEVELOPMENT OF IONOSPHERIC TOMOGRAPHY

This paper highlights the important role played by the EISCAT radar fo r verification in the development of tomographic techniques to produce images of ionospheric electron density. A brief review is given of so me of the stages in the application of tomographic reconstruction tech niques to the ionosphere. Results are presented to illustrate the effe ctiveness of the method in imaging ionospheric spheric structures at h igh latitudes. In addition, the results include the first tomographic image of the ionosphere for a region extending from mid-latitudes over mainland Scandinavia to high latitudes above Svalbard.