VNIIRT
VNIIRT - All-Russian Scientific Research Institute of Radio Engineering () is a Russian manufacturer of air surveillance radars. It is part of the Almaz-Antey holding. VNIIRT is the primary Russian designer of ground-based air surveillance radars. It performs scientific research and experimental design work on radars for both the strategic air defense forces and for the ground forces. It has devoted much attention to metric-band (VHF) radars, which have inherent counter-stealth capabilities and are relatively unaffected by meteorological obscuration. VNIIRT's products also have application to civil air traffic control.