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Shtora-1 (Штора, "curtain") is an electro-optical active protection system or suite for tanks, designed to disrupt the laser designator and laser rangefinders of incoming anti-tank guided missiles (ATGMs). The system is mounted on the Russian T-80 and T-90 series tanks and the Ukrainian T-84. The existence of Shtora was revealed in 1980 by Adolf Tolkachev. Shtora-1 is an electro-optical jammer that disrupts semiautomatic command to line of sight (SACLOS) ATGMs, laser rangefinders and target designators. Shtora-1 is a soft kill countermeasure system. The system was shown fitted to a Russian main battle tank during the International Defense Exposition, held in Abu Dhabi in 1995. The first known application of the system is the Russian T-90 main battle tank, which entered service in the Russian Army in 1993. It is also available on the BMP-3M infantry fighting vehicle. The Shtora-1 has four key components: two electro-optical/infrared (EO/IR) "dazzlers" mounted on both turret cheeks, an infrared jammer, a modulator, and a control panel in the fighting compartment. Banks of forward firing grenade launchers on each side of the turret that lay an aerosol smoke screen opaque to IR light. A laser warning system consisting of four angle sensors with two higher precision sensors covering the frontal 90° arc and two lower precision sensors covering the sides and rear. A control system comprising control panel, microprocessor, and manual screen-laying panel. This processes the information from the sensors and activates the aerosol screen-laying system. Two IR lights, one on each side of the main gun, continuously emit coded pulsed-IR jamming when an incoming ATGM has been detected. Shtora-1 has twelve smoke grenade launchers and weighs 400 kg. It can lay a 15 meter high and 20 meter wide smoke screen in three seconds that lasts about twenty seconds at ranges from 50 to 70 meters. The Shtora-1 can also automatically slew the main gun towards a detected threat, so that the tank crew can return fire and so that the stronger frontal turret armour is facing it.

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