Complex sentence: From this location the radar would be able to see almost all of Eastern Europe, as well as the western parts of the Soviet Union, and of particular interest it would be able to track missile launches from the Northern Fleet Missile Test Center at Plesetsk.
Split into simpler sentences: From this location the radar would be able to see almost all of Eastern Europe as well as the western parts of the Soviet Union. In particular, it would be able to track missile launches from the Northern Fleet Missile Test Center at Plesetsk.