EISCAT_3D with eyes between earth and space
A while ago the Swedish popular science magazine Populär Astronomi published an article about EISCAT_3D, written by Anders.
http://www.popularastronomi.se/wp-content/uploads/2018/04/2017_4_eiscat3d.pdf
The article is written in Swedish, but very interesting to read. Try Google Translate if you can not read Swedish.