How does radar work?

[tfsporer71559]

Do you get a wide range from one built up station or do you need them in every industrial center and coastal defense province?

[GIJoe597]

The higher/larger you build a radar station the larger area it covers. If you also research the radio tech lines the radar station will be used as a listening post.

Radar impact on air battles;
http://www.hoi3wiki.com/Air_combat#Radar_impact

Radar/intelligence

http://www.hoi3wiki.com/Intelligence