Press TV:
The Washington-based Institute for the Study of War (ISW) said in new report that in 2015, Russia began to establish a partial independent air defense network in Syria to protect its military assets at the Hmeimim Airbase and Tartus Naval Facility on the Mediterranean Coast.
Since then, the report said, Moscow has deployed S-300 and S-400 missile defense systems as well as four unique electronic warfare systems to Syria.
It also stationed at least one advanced 1L122-1E targeting radar and Barnaul-T mobile command-and-control system for short-range air defense systems in the war-torn state, the report added.