 The Su @-@ 35 employs an Irbis @-@ E passive electronically scanned array radar that constitutes an essential component of the aircraft 's fire @-@ control system . The radar is capable of detecting a 3 @-@ square @-@ metre ( 32 sq ft ) aerial target at a distance of 400 km ( 250 mi ) , and can track 30 airborne targets and engage eight of them at the same time . Su @-@ 35S uses the <unk> Irbis passive antenna array with electronic scanning radar for improved locating . The radar can also map the ground using a variety of modes , including the synthetic aperture mode . The Irbis @-@ E is complemented by an OLS @-@ 35 optoelectronic targeting system that provides laser ranging , TV , Infra @-@ red search and track ( IRST ) functionality . The Su @-@ 35 is compatible with a multitude of long- and short @-@ range air @-@ to @-@ air missiles , precision and unguided air @-@ to @-@ ground weaponry that include missiles , fuel @-@ air bombs and rockets . A maximum weapon payload of 8 tonnes can be carried on the fourteen hardpoints . The fighter may use missiles with a range of up to 300 km 
