OVERVIEW:  The Sapfir-21 aka JAY BIRD aka RP-22M radar is an airborne air-to-air fire-control radar operating in the NATO J band.

DETAILS: 
 The Sapfir-21 aka JAY BIRD aka RP-22M uses a twist-Cassegrain antenna and monopulse target tracking instead of a conical scan, improving its resistance to both passive and active jamming.  The radar can conduct limited high-aspect (side) intercepts.  Although it lacked a LD/SD capability, it had a limited ability to discern targets from background clutter.


Specifications:

	Frequency:	12.88-13.2 GHz (J-band (NATO))
	PRF:		1.592 -1792;   2.042 -2,048 ; 2.716 - 2.724 Khz
	Pulse width:	??
	Power: 		 ?? KW (peak) 
	Scan Limits:	30 ° azimuth, ±20 ° elevation.
	Range:		16/9.7 nm search (bomber/fighter aircraft)
			8/6 nm tracking (bomber/fighter aircraft)		

NOTES:  IOC: 1965.  Used in the MiG-21S as RP-22S.  Also used in the MiG-23S

SOURCES: Mladenov, Alexander. Soviet Cold War Fighters. Fonthill Media, 2017, location 3123  (Kindle ed.) ; Jane's Radar and Electronic Warfare Systems, "Sapfir Series Radars," 19 October 2000;  Mladenov, Alexander, Mikoyan-Gurevich MiG-21 (Air Vanguard 14)
