The SF-354 is a strike fighter aircraft (role of it - such as F-15E or Su-34). In air-to-surface configuration used 4 hardpoint under wing and 4 under fuselage for ordnance, Also have two internal weapon bay for stealth mission.
I seen different system in similar dome... Sattelite navigation system? (at chinese J-10B) Optical sensor? (at russian PAK-FA) Astronaviagation system? (at russain Tu-22M2/3 bomber). I think - second variant better.