Maybe, but dont know what they doing there. Also 2 Over The Horizon-B radars are building, one for Karwar and other for Varsha.
Nope, totally civilian. This is joint facility under ISRO,DAE and DRDO. But it looks like military one.
This is from very reliable sources that most of the facilities of SFC are in NE and in Ladakh, firstly the plan was to replace A1 and A2 with Shaurya and induct Prahhar.
But this plan for TNW dropped in 2012, and of Shaurya in 2013. Now the plan is to induct A4 as replacement to A1 and A2.