I dont Think there is that many SSR-radars covering the area, counting Swedish and Norwegian together.
Wrong
The NATO recognised air picture takes feeds from both civ and MIL radar sites. (The screenshot is from that system) I cannot comment on here about the MIL feeds, but I can comment that of the Avinor (Norwegian ANSP) radar sites, at least five SSR/MSSR sites would cover the area at cruise FL, and 3 would cover it down to FL100 or lower. Letīs just say that Norwegian controllers have had way better radar coverage in northern
Sweden for the last 25 years than the civ controllers in Sweden.
On that you can add X number of AD radars.