DRDO Anti-Radiation Missile G. Satheesh Reddy, the missile will feature a millimeter wave seeker capable of lock-on before launch and lock-on after launch modes. The missile picks up the radiation or signals of radars and communication facilities and homes on to the targets to destroy them. Instead of thrust propulsion, the missile uses dual pulse propulsion system just like Barak-8/LR-SAM. The benefit of dual pulse propulsion is that it will widen the envelope as well as the engagement capability of the missile. Work on the project began in 2012 at one of the DRDO laboratories soon after the project was given the go-ahead
Atmospheric refraction Atmospheric refraction Atmospheric refraction is the deviation of light or other electromagnetic wave from a straight line as it passes through the atmosphere due to the variation in air density as a function of height. This refraction is due to the velocity of light through air, decreasing (the refractive index increases) with increased density. Atmospheric refraction near the ground produces mirages. Such refraction can also raise or lower, or stretch or shorten, the images of distant objects without involving mirages. Turbulent air can make distant objects appear to twinkle or shimmer. The term also applies to the refraction of sound.