<page_title> Nizhny Novgorod Research Institute of Radio Engineering </page_title> <section_title> NNIIRT designed air surveillance radars </section_title> <table> <cell> P-8 Volga <col_header> Radar </col_header> </cell> <cell> KNIFE REST A <col_header> NATO reporting name </col_header> </cell> <cell> 1950 <col_header> Developed </col_header> </cell> <cell> The first Soviet radar with circular scan <col_header> Notes </col_header> </cell> <cell> 5N69 Salute <col_header> Radar </col_header> </cell> <cell> BIG BACK <col_header> NATO reporting name </col_header> </cell> <cell> 1975 <col_header> Developed </col_header> </cell> <cell> First Soviet 3D-radar <col_header> Notes </col_header> </cell> <cell> 55ZH6 Nebo <col_header> Radar </col_header> </cell> <cell> TALL RACK <col_header> NATO reporting name </col_header> </cell> <cell> VHF <col_header> Radio spectrum (NATO) </col_header> </cell> <cell> 1982 <col_header> Developed </col_header> </cell> <cell> First Soviet meter-wavelength 3D-radar <col_header> Notes </col_header> </cell> </table>
Innovations include the first Soviet air surveillance radar with a circular scan; the P-8 Volga (NATO: KNIFE REST A) in 1950, the first 3D-radar; the 5N69 Salute (NATO: BIG BACK) in 1975, and in 1982 the first VHF-band 3D-radar; the 55Zh6 Nebo (NATO: TALL RACK).