OVERVIEW:  The TP-26 IRST (Infrared Search and Track) is a passive airborne sensor that detects infrared radiation.

DETAILS: 
 The IRST provides a passive search capability for use in a high ECM environment.  Additionally, when used with an IR missile, it allows for a surprise/no notice passive interception capability. However, the IRST is partially attenuated by atmospheric conditions.  Also, it has a shorter range than radar, although its angular resolution is superior.


Specifications:

	Frequency:	Infrared
	Range:		24.3 nm search at high altitude vs. bomber
			13.5 nm search at high altitude vs. fighter, tail aspect, 				afterburner
			8.0 nm search at high altitude vs. fighter, tail aspect, 			military power
			5.4 nm search at low altitude vs. fighter, tail aspect, 			afterburner
	Arc:		60 degrees azimuth, 15 degrees elevation, 6 degree/sec 			tracking
			


NOTES:  Used in the MiG-23MLD and MiG-23P.
 

SOURCES: Mladenov, Alexander. Soviet Cold War Fighters. Fonthill Media, 2017, location 3302-3316, 3584;(Kindle ed.) 

