OVERVIEW:  The SPS-141 series airborne DECM active noise jammer for self-protection and aircraft element protection, operating in the G -I band.

DETAILS: 
  The SPS-141 is a first generation pod-mounted repeater jamming system that automatically generates active response jammers (repeaters) depending on the type of radar signals received and, through combinations of various range and angle deception techniques, enables individual self-protection and protection of aircraft formations against antiaircraft, air-to-air missiles and radar-guided antiaircraft guns. Response interferences are directed against pulse, continuous wave (CW), or quasi-CW radars.

The SPS-141 is against tracking radar systems and either active or semiactive missile seekers. The SPS-141 jams two distinct bands. It works in four modes: individual protection, two-aircraft protection (both aircraft having the SPS-141, cooperating with each other in jamming the enemy radar), "Doppler noise" mode, and low-level mode, where the equipment uses the terrain bounce effect in jamming.

When used by Iraq in the 1980's, strike formations using the jammer typically were composed of a  of four aircraft, each consisting of two elements of two aircraft. The lead of each element carries the SPS-141 for the protection of the section. The pod is activated about 5-10 NM outside the maximum range of the threat weapon system and deactivated when clear of the threat. 


Specifications:

	Frequency:	4-10 Ghz
	Power:		15W
	Coverage:	60° azimuth, 30° elevation
	
			
NOTES:  Airborne "thermal" jammer in the Gvozdika series.  The system was primarily designed to work against the NATO HAWK SAM system. 

 

SOURCES:  DIA, "Electronic Warfare Forces Study-Iraq (August 1990) https://www.archives.gov/files/declassification/iscap/pdf/2014-033-doc01.pdf; Friedman, Norman. The Naval Institute Guide to World Naval Weapons Systems, 1997-1998. Naval Inst Press, 1997, pg. 515 ; "Soviet MiG-21SM Fishbed-J." Eastern Order of Battle. Accessed February 12, 2022. https://www.easternorbat.com/html/soviet_mig-21sm_fishbed-j_eng.html ; "SU22M4." Homepage Manfred Bischoff. Accessed February 13, 2022. https://www.manfred-bischoff.de/SU22.htm#St%F6r-/T%E4uschbeh%E4lter%20SPS-14.

