What is D4 Drone system?

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Key facts about D4 Drone System:

What is it? The Drone Detect, Deter and Destroy system (D4S) is the first indigenously developed anti-drone system to be inducted into the Indian Armed Forces.
It is developed by Defence Research and Development Organisation (DRDO) and manufactured by Bharat Electronics Limited (BEL).
Purpose: To detect rogue drones that are likely to attack most vulnerable places.
Features:
- D4 system can instantly detect and jam micro drones (Soft kill) and use a laser-based kill mechanism to terminate targets (Hard kill).
- It uses DRDO’s RF/Global Navigation Satellite System (GNSS) to detect the frequency which is being used by the controller and the signals are then jammed.
- It can detect and jam micro-drones at a distance of up to 3 km.
- It can lase a target 1-1.25 km far depending on the wattage of the laser weapon.

About Aero India:

It is a biennial air show and aviation exhibition held in Bengaluru, India at the Yelahanka Air Force Station.
It is organised by the Defence Exhibition Organisation, Ministry of Defence.

Q1) What is an anti-drone system?

Anti-drone systems are designed to counter-drone technologies and interfere with them in various ways and are used to detect and/or intercept unwanted drones and unmanned aerial vehicles (UAVs).

Source: AI to missile systems, BEL to put up big show at Aero India