SNR-75
{{Infobox Radar
|name = SNR-75 radar
|image = Fan Song fire control radar of the SA-2 SAM-system.JPEG
|caption = Egyptian Fan Song E
|country = {{flagcountry|Soviet Union}}
|introdate =
|number =
|type = Fire control & tracking
|frequency = E/F band, G band {{cite web |url=http://www.globalsecurity.org/military/world/russia/fan-song.htm |title=FAN SONG |date=2006-04-22 |access-date=2010-06-01 |publisher=GlobalSecurity.org}}
|PRF = search: 828-1,440 Hz; track: 1,656-2,880 Hz (G band)
|beamwidth = 10x2deg (E/F band);
7.5x1.5deg (G band)
|pulsewidth = 0.4-1.2 μs (G band)
|RPM =
|range = 60-120 km (E/F band);
75-145 km (G band)
|altitude =
|diameter =
|azimuth =
|elevation =
|precision =
|power = 600 kW (E/F band);
1.0 MW (G band)
|other names =
}}
The SNR-75 (also referred to by the NATO reporting name Fan Song) is a series of trailer-mounted E band/F band and G band fire control and tracking radars for use with the Soviet SA-2 Guideline surface-to-air missile system.
Description
The Fan Song radars are capable of tracking 6 targets at a time, and can guide up to three missiles at once to it. The radars feature two orthogonal antennas, one for azimuth and one for elevation, which can operate in a track-while-scan mode. These antennas transmit 10 × 2 degree or 7.5 x 1.5 degree beams and perform a 'flapping' motion as they scan their sectors.{{cite web
|url=http://www.janes.com/articles/Janes-Radar-and-Electronic-Warfare-Systems/Fan-Song-missile-control-radars-Russian-Federation.html
|title='Fan Song' missile control radars (Russian Federation)
|access-date=2010-06-01
|archive-url=https://web.archive.org/web/20110815051824/http://articles.janes.com/articles/Janes-Radar-and-Electronic-Warfare-Systems/Fan-Song-missile-control-radars-Russian-Federation.html
|archive-date=2011-08-15
|publisher=Jane's Information Group
}}
The Fan Song E includes two additional parabolic dishes for narrow beam and LORO tracking modes.{{Cite web
|title=Missile Control Radar "Fan Song E" (PW S-75 "Wolchow")
|website=Radar Tutorial
|url=https://www.radartutorial.eu/19.kartei/11.ancient/karte030.en.html
}}