Adopted in 1981 RP-31 N007
backstop (Russian -
Zaslon). • the range of detection of air targets for Zaslon-A: 200 km (for the purpose of a
radar cross-section of 19 m2 on a collision angle with probability 0.5) • target detection distance with
radar cross-section of 3 m2 in the rear within 35 km with a probability of 0.5 () • number of detected targets: 24 (was originally 10) • number of targets for attack: 6 (was originally 4) • range of automatic tracking: 120 km • detection of thermal goals: 56 km • Has great opportunities for the detection of cruise missiles and other targets against the background of the earth's surface The onboard radar complex of the MiG-31BM can track 24 airborne targets at one time, 6 of which can be simultaneously attacked by
R-33S missiles. The MiG-31M, MiG-31D, and MiG-31BM standard aircraft have an upgraded
Zaslon-M radar, with larger antenna and greater detection range (said to be 400 km (250 mi) against
AWACS-size targets) and the ability to attack multiple targets — air and ground — simultaneously. The Zaslon-M has a 1.4 m diameter (larger) antenna, with 50% to 100% better performance than Zaslon. In April 1994 it was used with an
R-37 to hit a target at 300 km distance. ==Variants==