Indian Air Defence Systems and Integrated Air Command and Control

India maintains a multi-layered air defence architecture designed to counter threats ranging from low-altitude unmanned aerial vehicles (UAVs) to long-range ballistic and cruise missiles. This defense apparatus integrates surface-to-air missile (SAM) batteries, anti-aircraft artillery, airborne warning platforms, and radar arrays into a central automated backbone known as the Integrated Air Command and Control System (IACCS).

Integrated Air Command and Control System (IACCS)

The IACCS functions as the central digital nerve center for the Indian Air Force (IAF). Developed indigenously by Bharat Electronics Limited (BEL), it links all air defence assets to establish a unified operational view.

Operational Mechanism

The IACCS operates over the Air Force Network (AFNet), a secure fiber-optic digital grid. It aggregates real-time data from diverse platforms into a single Recognized Air Situation Picture (RASP).

• Sensor Data Fusion: Integrates inputs from civilian air traffic radars, military ground radars, aerostats, and Airborne Early Warning and Control (AEW&C) systems.
• Automated Threat Assessment: Evaluates target speed, trajectory, and radar cross-section to classify incoming objects as hostile, friendly, or neutral.
• Command Distribution: Facilitates central decision-making while enabling decentralized execution at tactical command nodes across regional sectors.

Joint Air Defence Integration

To build a joint operational framework across all military branches, the IACCS integrates distinct service-level air defence networks.

• Akashteer System: Developed by BEL for the Indian Army, Akashteer automates low-level air defence control in forward battlefield areas.
• Trigun System: The Indian Navy’s tactical command network feeds maritime aerial track data directly into the IACCS grid.
• Joint Air Defence Centre (JADC): Brings Army radar inputs from Akashteer, IAF networks, and civilian radars under a single command structure led by the IAF.

Multi-Layered Air Defence Tiers

India arranges its kinetic air defence weapons in distinct operational tiers based on engagement range and interception altitude.

Key Weapon Systems and Technologies

Ballistic Missile Defence (BMD)

The Defence Research and Development Organisation (DRDO) developed India’s two-tier BMD shield.

• Prithvi Air Defence (PAD) / Pradyumna: Exo-atmospheric interceptor designed to hit targets at altitudes between 50 km and 80 km.
• Advanced Air Defence (AAD) / Ashwin: Endo-atmospheric interceptor operating at altitudes up to 30 km.
• AD-1 and AD-2 Interceptors: Developed under BMD Phase II, these platforms target long-range intercontinental ballistic missiles and low-earth orbit satellites.

Strategic Long-Range and Medium-Range SAMs

• S-400 Triumf: Sourced from Russia, this mobile long-range system uses four missile types (40N6E, 48N6, 9M96E2, 9M96E) to counter targets up to 400 km away.
• Project Kusha (XRSAM): An indigenous long-range surface-to-air missile system under development by DRDO, designed to engage targets up to 350 km.
• MR-SAM (Barak-8): Jointly developed by DRDO and Israel Aerospace Industries (IAI), featuring an active radar seeker and dual-pulse motor for engagement up to 70 km.

Indigenous Short and Very Short-Range Systems

• Akash System: Uses a supersonic ramjet propulsion engine and phased-array Rajendra radar to track up to 64 targets and engage multiple threats simultaneously.
• QRSAM (Quick Reaction Surface-to-Air Missile): Designed for army strike columns, capable of detecting and engaging targets on the move.
• VSHORADS: Man-portable, 4th-generation infrared homing system designed by DRDO for low-altitude aerial threats in mountainous terrain.

Anti-Aircraft Artillery and Counter-UAS

• Upgraded Air Defence Guns: Modernized L-70 Bofors and ZU-23-2 twin guns fitted with electro-optical tracking, thermal cameras, and laser rangefinders for point defense against drone swarms.
• D4 System: DRDO’s Drone Detect, Deter and Destroy system utilizes soft-kill measures (RF jamming, spoofing) alongside hard-kill laser energy weapons against low-radar-cross-section UAVs.

Surveillance and Radar Networks

Radar Systems

• Arudhra: Medium Power Radar (MPR) featuring a 3D active electronically scanned array (AESA).
• Ashwini: Low Level Light-weight Radar (LLTR) optimized for high-mobility detection of low-flying targets in mountain regions.
• Swordfish Long-Range Tracking Radar (LRTR): Derived from the Israeli Green Pine radar, functioning as the primary detection sensor for the BMD program.

Airborne Early Warning Platforms

• NETRA AEW&C: Embraer-145 platform carrying an indigenous dual-side AESA radar with 240-degree coverage.
• A-50EI Phalcon AWACS: Il-76 platform equipped with Israeli EL/W-2090 AESA radar providing continuous 360-degree aerial tracking over long distances.

Key Facts and Exam Trivia

• AFNet Foundation: The Air Force Network (AFNet) replaced outdated 1950s tropo-scatter communication technology in September 2010.
• Akashteer Developer: Built by Bharat Electronics Limited (BEL) under the Atmanirbhar Bharat initiative for the Indian Army.
• Akash Missile Propulsion: Employs a solid-booster ramjet rocket engine that maintains supersonic speed throughout its flight path.
• BMD Interception Speed: The PAD interceptor missile achieves speeds up to Mach 5 to neutralize incoming ballistic missiles.
• Primary Radar Developer: LRDE (Electronics and Radar Development Establishment), a Bengaluru-based laboratory under DRDO, designs India’s indigenous military radars.
• Network Integration Status: The integration of naval, army, and civilian radar nodes into the IAF’s IACCS enables single-window airspace management across Indian territory.