Astra uses a terminal active radar seeker, let's see the philosophy behind it. Other seekers are only receivers, but the one used in Astra is a transceiver a transistor cum receiver, it is basically a mini radar itself radars can be fooled and can be deceived , but the more a radar is closer to the target the lesser are the chances of fooling it. Since terminal guidance stage goes active when it is 'enough near’ the target the question weather the terminal active seeker be spoofed, jammed or decoyed is a big question. To counter the spoofing and jamming their is an effective technique, which is passive radiation homing . Spoofing the active seeker means using the radio waves coming from it and showing a false target, Jamming means shooting heavy pulses at an antenna in an order to overload and burn it from inside.
Here in both spoofing and jamming the enemy would be giving radio waves and the technique of passive radiation homing uses these same waves as 'feed’ and homes in on a target. During tests in March 2016 conducted near Pune, Astra Missile was tested, it was sought to be jammed to see how it performs in such a scenario at the time of war when the enemy tries to jam its operation. The ECCM (electronic counter-countermeasure) features of the missile to overcome any jamming were evaluated. “The trials were vigorous. But the state-of-the-art missile did very well,” said a source that reported this event.