1L269 Krasukha-2 designed to jam S-band (2.3 gigahertz/GHz to 2.5GHz/2.7GHz to 3.7GHz)
radars used by airborne early warning and control aircraft
1RL257 which is capable of detecting and geo-locating X-band transmissions meant that radars like the AN/TPQ-36 could fall foul of jamming
The Ka-band is the preferred band for high-performance geostationary communications satellites and is also being increasingly used by low-Earth orbit satellite constellations
the two systems seem to be mainly aimed at jamming airborne radar systems, Krasukha-4 is also widely reported to have the ability to interfere with observations of radar reconnaissance satellites. An old version of KRET’s website described it as a “mobile electronic warfare system to suppress spy satellites, ground-based radars and AWACS airborne systems,” adding that it can “fully cover an object from radar detection at 150–300 km” by creating “powerful jamming at fundamental radar frequencies
In May 2015, the Interfax-AVN news agency quoted an anonymous military official as saying that Krasukha-4 was being successfully used against US radar reconnaissance satellites of the Lacrosse type, which in his words were “mainly intended to observe the deployment sites of Topol and Yars mobile ICBM complexes,” adding they could “search for those satellites and ensure the necessary jamming.
“disguise ground-based and airborne objects from air-based and space-based reconnaissance through the electronic suppression of air-based and space-based radar systems.”
The ‘+30 dB’ idea is used in yet one more of the newest developments of VNII ‘Gradient’ — 1RL257 ‘Krasukha-4,’ which is at present being actively placed in EW brigades and independent battalions and is designated for suppression of air-based radars, including not only those on fighters and fighter-bombers, but also on E-8 and U-2 reconnaissance aircraft. True, there are doubts about the effectiveness of ‘Krasukha’ against the ASARS-2 radar at a U-2 altitude, since, judging by the available data, its signal is not only sufficiently complex, but still also noise-like.”
“In the opinion of developers and the military, under certain conditions, the 1RL257 can even jam warhead seekers of AIM-120 AMRAAM ‘air-to-air’ missiles, and also the command and control radars of the ‘Patriot’ surface-to-air missile system.”
the 1RL257E Krasukha-S4, is being delivered to the military this year, according to Kret. It is an X-band system designed for use against tactical airborne radars and AGS systems. Both Krasukha systems can operate independently, but are mainly intended to work as part of a multiplatform electronic attack force, with multiple, widely separated jammer locations used to increase the chances of jamming through a target’s main beam.
